Foundation is an important structural member of a building as it transfers all the structural loads to the ground safely and uniformly so that no stress concentration will occur anywhere in the building. So the foundation of the structure should be designed properly as per the codal provision and maintained according to the structural modification. But when the structural modification occurs in the form of extension of the building horizontally or vertically it becomes necessary to modify the foundation due to the additional load. But some people don’t consider the foundation as a structural element and hence they don’t modify the foundation according to the modified structural requirement. It results in the deficiency of foundation in the terms of reduction of bearing capacity and settlement of foundation. For these deficient foundations retrofitting is needed so that the deficiency can be minimized. In this work the case of vertical storey extension has been taken and deficiency of foundation has been calculated. A retrofitting technique has been discussed which can be applied for the deficient foundation i.e Underpinning by Micropiling. This technique has been applied on the foundation and hence retrofit effectiveness of the technique has been assessed.
{"title":"Analysis of Retrofitting Technique of Deficient Foundation by Underpinning by Micropiling: A Critical Review","authors":"Saswati Sahoo, S. Satapathy","doi":"10.2139/ssrn.3761563","DOIUrl":"https://doi.org/10.2139/ssrn.3761563","url":null,"abstract":"Foundation is an important structural member of a building as it transfers all the structural loads to the ground safely and uniformly so that no stress concentration will occur anywhere in the building. So the foundation of the structure should be designed properly as per the codal provision and maintained according to the structural modification. But when the structural modification occurs in the form of extension of the building horizontally or vertically it becomes necessary to modify the foundation due to the additional load. But some people don’t consider the foundation as a structural element and hence they don’t modify the foundation according to the modified structural requirement. It results in the deficiency of foundation in the terms of reduction of bearing capacity and settlement of foundation. For these deficient foundations retrofitting is needed so that the deficiency can be minimized. \u0000 \u0000In this work the case of vertical storey extension has been taken and deficiency of foundation has been calculated. A retrofitting technique has been discussed which can be applied for the deficient foundation i.e Underpinning by Micropiling. \u0000 \u0000This technique has been applied on the foundation and hence retrofit effectiveness of the technique has been assessed.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123893256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This research, it is primarily intended to assess parametric study of pre-stressed Box-Girder bridges. Radius of Curvature was varied in 50m span bridge in horizontal direction only. All the models are subjected to self-weight and moving load of IRC class 70R vehicle [3]. For this research, a three dimensional finite element (FE) model of two lane simply supported Box Girder Bridge made up of pre-stressed concrete has been developed using commercial software SAP 2000 version 14.0. Modal analysis has been carried out to obtain the mode shapes and various vibration properties such as fundamental time period and frequencies. For acceleration time history analysis Gorkha Earthquake has been used. From modal analysis the longitudinal stress at top and bottom of cross sections, bending moment, torsion, deflection and fundamental frequency are calculated. The responses of a curved bridges in comparison straight bridge are recorded. The ratio of responses is represented by a parameter. From the responses linear equation has been generated for torsion, bending moment, and deflection. Increase in Bending Moment, Torsion, deflection and stresses due to curvature can be represented by multiplication factor, ratio of maximum response of curved bridge to that of straight bridge from moving load analysis, within reasonable accuracy which can be used in preliminary design.
本研究主要是对预应力箱梁桥的参数化研究进行评估。50m跨径桥梁的曲率半径仅在水平方向发生变化。所有模型均承受IRC级70R车辆的自重和移动载荷[3]。本研究利用商业软件SAP 2000 version 14.0建立了预应力混凝土双车道简支箱梁桥的三维有限元模型。进行了模态分析，得到了模态振型和各种振动特性，如基本周期和频率。用廓尔喀地震进行加速度时程分析。通过模态分析，计算了截面上下纵向应力、弯矩、扭转、挠度和基频。记录了弯桥与直桥的响应。响应的比率由一个参数表示。从响应中得到了扭转、弯矩和挠度的线性方程。曲率引起的弯矩、扭转、挠度和应力的增加可以用移动荷载分析得出的曲线桥与直桥最大响应之比的乘法因子来表示，在合理的精度范围内，可用于初步设计。
{"title":"Parameters of Pre-Stressed Box Girder Bridge under Different Radius of Curvature","authors":"Dr Rajan Suwal, D. Sharma","doi":"10.2139/ssrn.3741371","DOIUrl":"https://doi.org/10.2139/ssrn.3741371","url":null,"abstract":"This research, it is primarily intended to assess parametric study of pre-stressed Box-Girder bridges. Radius of Curvature was varied in 50m span bridge in horizontal direction only. All the models are subjected to self-weight and moving load of IRC class 70R vehicle [3]. For this research, a three dimensional finite element (FE) model of two lane simply supported Box Girder Bridge made up of pre-stressed concrete has been developed using commercial software SAP 2000 version 14.0. Modal analysis has been carried out to obtain the mode shapes and various vibration properties such as fundamental time period and frequencies. For acceleration time history analysis Gorkha Earthquake has been used. From modal analysis the longitudinal stress at top and bottom of cross sections, bending moment, torsion, deflection and fundamental frequency are calculated. The responses of a curved bridges in comparison straight bridge are recorded. The ratio of responses is represented by a parameter. From the responses linear equation has been generated for torsion, bending moment, and deflection. Increase in Bending Moment, Torsion, deflection and stresses due to curvature can be represented by multiplication factor, ratio of maximum response of curved bridge to that of straight bridge from moving load analysis, within reasonable accuracy which can be used in preliminary design.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121981635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.15587/1729-4061.2020.206373
S. Novak, V. Drizhd, O. Dobrostan
Given the need to minimize the weight-dimensional indicators of steel structures, the issue of the effective use of a combined fire protection system is relevant. The article deals with the thermal state of steel structures with such a system of fire protection under conditions of fire exposure in the standard temperature mode according to DSTU B V. 1.1-4-98*. The experimental samples used square steel plates with a side of 500 mm and a thickness of 5 mm and 10 mm. The conducted research revealed the peculiarities of dependences of the temperatures of steel structures with passive and reactive fire-retardant materials of two brands on the duration of fire exposure. It was established that these dependences for steel structures with combined, passive, and reactive fire protection systems have a monotonously growing character. The maximum values of the duration of fire exposure are typical of the experimental samples that have the steel plate of the thickness of 10 mm, for a critical temperature of steel of 600 °C. They are 111 min, 101 min, 55 minutes, respectively, for the combined, passive, and reactive fire protection systems. It was established that a combined fire protection system is characterized by an increase in the duration of reaching the critical temperature of steel in comparison with passive and reactive fire protection systems. This is due to the effective combination of physical and chemical properties of passive and reactive fire-retardant materials. For the duration of fire exposure up to 79 min, the value of the duration of reaching the critical temperature of steel for a combined fire protection system exceeds the sum of durations of its achievement, which are typical for passive and reactive fire protection systems. This indicates the effectiveness of a combined system in this range of fire exposure duration. At an increase in the duration of fire exposure, the effectiveness of a combined fire protection system decreases.
考虑到需要尽量减少钢结构的重量尺寸指标，有效使用组合消防系统的问题是相关的。本文根据DSTU B V. 1.1-4-98*的标准温度模式，讨论具有这种防火系统的钢结构在火灾暴露条件下的热状态。实验样品采用边长为500mm，厚度为5mm和10mm的方形钢板。所进行的研究揭示了两种品牌的被动和反应阻燃材料的钢结构的温度对火灾暴露时间的依赖性的特殊性。结果表明，具有组合式、被动式和反应式防火系统的钢结构的这些依赖关系具有单调增长的特征。在钢的临界温度为600°C时，火灾暴露持续时间的最大值是典型的具有10 mm厚钢板的实验样品。组合式、被动式和反应式消防系统分别为111分钟、101分钟和55分钟。结果表明，与被动和反应式消防系统相比，组合式消防系统的特点是达到钢的临界温度所需的时间更长。这是由于被动和反应性阻燃材料的物理和化学性能的有效结合。对于火灾暴露时间长达79分钟的组合消防系统，达到钢的临界温度的持续时间的值超过其达到的持续时间的总和，这是典型的被动和反应性消防系统。这表明在此火灾暴露时间范围内组合系统的有效性。随着火灾持续时间的增加，综合消防系统的有效性降低。
{"title":"Thermal State of Steel Structures With a Combined Fire Protection System Under Conditions of Fire Exposure","authors":"S. Novak, V. Drizhd, O. Dobrostan","doi":"10.15587/1729-4061.2020.206373","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.206373","url":null,"abstract":"Given the need to minimize the weight-dimensional indicators of steel structures, the issue of the effective use of a combined fire protection system is relevant. The article deals with the thermal state of steel structures with such a system of fire protection under conditions of fire exposure in the standard temperature mode according to DSTU B V. 1.1-4-98*. The experimental samples used square steel plates with a side of 500 mm and a thickness of 5 mm and 10 mm. The conducted research revealed the peculiarities of dependences of the temperatures of steel structures with passive and reactive fire-retardant materials of two brands on the duration of fire exposure. It was established that these dependences for steel structures with combined, passive, and reactive fire protection systems have a monotonously growing character. The maximum values of the duration of fire exposure are typical of the experimental samples that have the steel plate of the thickness of 10 mm, for a critical temperature of steel of 600 °C. They are 111 min, 101 min, 55 minutes, respectively, for the combined, passive, and reactive fire protection systems. It was established that a combined fire protection system is characterized by an increase in the duration of reaching the critical temperature of steel in comparison with passive and reactive fire protection systems. This is due to the effective combination of physical and chemical properties of passive and reactive fire-retardant materials. For the duration of fire exposure up to 79 min, the value of the duration of reaching the critical temperature of steel for a combined fire protection system exceeds the sum of durations of its achievement, which are typical for passive and reactive fire protection systems. This indicates the effectiveness of a combined system in this range of fire exposure duration. At an increase in the duration of fire exposure, the effectiveness of a combined fire protection system decreases.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116847676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-10DOI: 10.35337/ejasr.2020.v02i04.005
G. Buvanesan, P. Haritha, A. Karthikeyan, K. Vidhya, R. Manirasu
Fundamentally, concrete is extensively used as structure material because of the truth of its over the top quality cost extent in various applications. Significant improvements usually are foreseen to deftly inconvenience-free providers over the range of its inferred arrangement life. Regardless, these wants are not perceived in multiple revisions given the truth of assistant insufficiency, material rot, unanticipated loadings or physical wickedness, and subsequently, Civil structures like structures, dams, ranges, etc. are presented to steady deterioration all through the long haul. This level of damage or disintegrating depends on the unimaginable substances and artistry at each the structure stage. The breaking down of advancements can be a last result of the extent of factors far-reaching radiator hurt, ice movement, substance attack, utilization of steel, etc. at some stage in the structure's lifestyle scope. The adequacy assessment is consequently essential for finding the construction's contemporary convenience and its expansion for future developments or alterations in its utilization. Such an evaluation can be finished using the methodologies: a) Visual evaluation, b) Non-Destructive Testing c) Partial Destructive Testing. Also, it changes into essential for structures hit with the guide of a seismic quake, a bomb sway, or any exceptional calamity. All around, Soundness evaluation to be executed for improvements which are navigated 15 years of age.
{"title":"Strength Assessment and Restoration of RC Structures by Structural Health Monitoring Techniques","authors":"G. Buvanesan, P. Haritha, A. Karthikeyan, K. Vidhya, R. Manirasu","doi":"10.35337/ejasr.2020.v02i04.005","DOIUrl":"https://doi.org/10.35337/ejasr.2020.v02i04.005","url":null,"abstract":"Fundamentally, concrete is extensively used as structure material because of the truth of its over the top quality cost extent in various applications. Significant improvements usually are foreseen to deftly inconvenience-free providers over the range of its inferred arrangement life. Regardless, these wants are not perceived in multiple revisions given the truth of assistant insufficiency, material rot, unanticipated loadings or physical wickedness, and subsequently, Civil structures like structures, dams, ranges, etc. are presented to steady deterioration all through the long haul. This level of damage or disintegrating depends on the unimaginable substances and artistry at each the structure stage. The breaking down of advancements can be a last result of the extent of factors far-reaching radiator hurt, ice movement, substance attack, utilization of steel, etc. at some stage in the structure's lifestyle scope. The adequacy assessment is consequently essential for finding the construction's contemporary convenience and its expansion for future developments or alterations in its utilization. Such an evaluation can be finished using the methodologies: a) Visual evaluation, b) Non-Destructive Testing c) Partial Destructive Testing. Also, it changes into essential for structures hit with the guide of a seismic quake, a bomb sway, or any exceptional calamity. All around, Soundness evaluation to be executed for improvements which are navigated 15 years of age.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122361630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-07DOI: 10.34218/ijciet.11.1.2020.017
Masdiana Masdiana, Siti Nurjanah Ahmad, Mrs. Sulha, M. T. Azikin, Ahmad Syarif Sukri
The Technology of precast concrete growing rapidly. The concrere research has been aimed to create an innovation simplify and to reduce weaknesses of concrete include precast concrete. This study aims to research the connection of precast beams with combination notches type. This study used precast beams which dimensions were 20x30x270 cm, f’(c) was 25MPa. The precast beams which connection by diagonal types, the length of connection was 15 cm and 20 cm. The samples used 3(three) beams ie. 2 (two) of beams precast as BM-15 and BM-20 which are connected by diagonal types with grouting 0MPa and 1 (one) of monolith beam as BN. The results of researches that the strongest beam precast was BM-20 on 44,05 kN or 30,41 % than monolith beam (BN).
预制混凝土技术发展迅速。混凝土研究的目的是创造一种创新，简化和减少混凝土的弱点，包括预制混凝土。本研究旨在研究组合缺口式预制梁的连接方式。本研究采用预制梁，尺寸为20x30x270 cm, f ' (c)为25MPa。预制梁采用对角线连接方式，连接长度分别为15 cm和20 cm。样品采用3(三)梁即。2(2)根预制为BM-15和BM-20，采用对角线方式连接，注浆0MPa; 1(1)根整体梁为BN。研究结果表明，BM-20预制梁强度为44.05 kN，比整体梁(BN)高30.41 %。
{"title":"The Study of Beam Connection with Diagonal Models","authors":"Masdiana Masdiana, Siti Nurjanah Ahmad, Mrs. Sulha, M. T. Azikin, Ahmad Syarif Sukri","doi":"10.34218/ijciet.11.1.2020.017","DOIUrl":"https://doi.org/10.34218/ijciet.11.1.2020.017","url":null,"abstract":"The Technology of precast concrete growing rapidly. The concrere research has been aimed to create an innovation simplify and to reduce weaknesses of concrete include precast concrete. This study aims to research the connection of precast beams with combination notches type. This study used precast beams which dimensions were 20x30x270 cm, f’(c) was 25MPa. The precast beams which connection by diagonal types, the length of connection was 15 cm and 20 cm. The samples used 3(three) beams ie. 2 (two) of beams precast as BM-15 and BM-20 which are connected by diagonal types with grouting 0MPa and 1 (one) of monolith beam as BN. The results of researches that the strongest beam precast was BM-20 on 44,05 kN or 30,41 % than monolith beam (BN).<br>","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116210498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Biswas, V. Dalvi, S. Deshmukh, S. Panse, J. Joshi
As the exploitation of solar energy has taken place in the field of R&D, structural steel has become a major part of the design and development of the next generation collectors. The design practice used in India and in the Asian community has been considered in major designing and has been considered as a new approach in analysing the wind-load, dead load conditions. These load conditions have been evaluated and analysed at various angular positions of the collector. The optimum dimension for some elements due to the state of the art design has been described in this work and has been highlighted.
{"title":"Designing of Parabolic Trough Solar Concentrator Using Structural Steel","authors":"D. Biswas, V. Dalvi, S. Deshmukh, S. Panse, J. Joshi","doi":"10.2139/ssrn.3526697","DOIUrl":"https://doi.org/10.2139/ssrn.3526697","url":null,"abstract":"As the exploitation of solar energy has taken place in the field of R&D, structural steel has become a major part of the design and development of the next generation collectors. The design practice used in India and in the Asian community has been considered in major designing and has been considered as a new approach in analysing the wind-load, dead load conditions. These load conditions have been evaluated and analysed at various angular positions of the collector. The optimum dimension for some elements due to the state of the art design has been described in this work and has been highlighted.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132789380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Comparing experimental results on the shear capacity of steel fiber-reinforced concrete (SFRC) beams without mild steel stirrups, to the ones predicted by current design equations and other available formulations, still shows significant differences. In this paper we propose the use of artificial intelligence to estimate the shear capacity of these members. A database of 430 test results reported in the literature is used to develop an artificial neural network-based formula that predicts the shear capacity of SFRC beams without shear reinforcement. The proposed model yields maximum and mean relative errors of 0.0% for the 430 data points, which represents a better prediction (mean Vtest / VANN = 1.00 with a coefficient of variation of 1× 10-15) than the existing expressions, where the best model yields a mean value of Vtest / Vpred = 1.01 and a coefficient of variation of 27%.
不加低碳钢箍筋的钢纤维混凝土(SFRC)梁的抗剪承载力试验结果与现有设计方程和其他可用公式的预测结果相比，仍然存在显著差异。在本文中，我们提出使用人工智能来估计这些成员的抗剪能力。利用文献中报道的430个试验结果的数据库，开发了一个基于人工神经网络的公式，该公式可以预测无抗剪加固的SFRC梁的抗剪能力。该模型对430个数据点的最大相对误差和平均相对误差为0.0%，比现有表达式的预测效果更好(平均Vtest / VANN = 1.00，变异系数为1× 10-15)，其中最佳模型的平均值为Vtest /Vpred = 1.01，变异系数为27%。
{"title":"ANN-based Shear Capacity of Steel Fiber-Reinforced Concrete Beams Without Stirrups","authors":"M. Abambres, E. Lantsoght","doi":"10.2139/ssrn.3457585","DOIUrl":"https://doi.org/10.2139/ssrn.3457585","url":null,"abstract":"Comparing\u0000experimental results on the shear capacity of steel fiber-reinforced concrete\u0000(SFRC) beams without mild steel stirrups, to the ones predicted by current\u0000design equations and other available formulations, still shows significant\u0000differences. In this paper we propose the use of artificial intelligence to estimate\u0000the shear capacity of these members. A database of 430 test results reported in\u0000the literature is used to develop an artificial neural network-based formula that\u0000predicts the shear capacity of SFRC beams without shear reinforcement. The\u0000proposed model yields maximum and mean relative errors of 0.0% for the 430 data\u0000points, which represents a better prediction (mean Vtest / VANN = 1.00 with a coefficient of\u0000variation of 1× 10-15) than the existing expressions, where the best\u0000model yields a mean value of Vtest /\u0000Vpred = 1.01 and a coefficient of variation of 27%.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"9 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132927225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fire in buildings is one of the most destructive accidental loads that may occur during its design lifetime which can significant loss of life and property. Past building fire incidents indicated the necessity of incorporation of its effect in structural design approaches. Currently, the fire design of RC columns is based on the prescriptive method suggested in National Building Code (NBC) 2016 and IS 456: 2000 which only provides minimum dimensions and cover values for various fire durations with an assumption that all column faces will be subjected to fire exposure simultaneously. However, in realistic scenarios the columns may be subjected to non-uniform/uniform fire scenarios viz. 1-, 2-, 3-face fire exposures are non-uniform and all 4 face fire exposures is uniform, depending on their location in building and location of fire. As the modern design approaches are moving towards the performance based design, the assumption of uniform fire case does not holds good. This paper presents a comparative study of column capacities subjected to non-uniform fire exposures computed using Tan and Yao method and compares with column capacities computed by zoning method of Eurocode-2. In this study a set of columns of an existing educational building with different fire exposure conditions are considered. The collapse load for those columns is determined by both Eurocode-2 method which considers uniform fire case and Tan and Yao method which considers non-uniform case. The variation in their collapse loads from both methods is shown. The study also provides the actual fire rating of columns subjected to non-uniform fires which is an aspect of public fire safety in buildings.
{"title":"Performance Assessment of RC Columns Subjected to Non-Uniform Fire Exposure","authors":"Anand Chatter, Ratnesh Kumar","doi":"10.2139/ssrn.3368026","DOIUrl":"https://doi.org/10.2139/ssrn.3368026","url":null,"abstract":"Fire in buildings is one of the most destructive accidental loads that may occur during its design lifetime which can significant loss of life and property. Past building fire incidents indicated the necessity of incorporation of its effect in structural design approaches. Currently, the fire design of RC columns is based on the prescriptive method suggested in National Building Code (NBC) 2016 and IS 456: 2000 which only provides minimum dimensions and cover values for various fire durations with an assumption that all column faces will be subjected to fire exposure simultaneously. However, in realistic scenarios the columns may be subjected to non-uniform/uniform fire scenarios viz. 1-, 2-, 3-face fire exposures are non-uniform and all 4 face fire exposures is uniform, depending on their location in building and location of fire. As the modern design approaches are moving towards the performance based design, the assumption of uniform fire case does not holds good. This paper presents a comparative study of column capacities subjected to non-uniform fire exposures computed using Tan and Yao method and compares with column capacities computed by zoning method of Eurocode-2. In this study a set of columns of an existing educational building with different fire exposure conditions are considered. The collapse load for those columns is determined by both Eurocode-2 method which considers uniform fire case and Tan and Yao method which considers non-uniform case. The variation in their collapse loads from both methods is shown. The study also provides the actual fire rating of columns subjected to non-uniform fires which is an aspect of public fire safety in buildings.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131312060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shivani S. Shahane, Nikita S. Rasate, Dhanashree D. Rane, Ramesh V. Bhandare
In day to day life, bent tubes or pipes finds its application in various sectors like hydraulic lines, fuel lines, exhaust pipes, water lines, boiler, air conditioning, ship building, furniture, power generation, recreational vehicle, railroad, automotive, off road and farm equipment, aircraft industries and many more. Hence, the study and analysis of bent pipe has gained a huge importance .The purpose of current study is to analyze the bent pipes for various spans when load is applied to check its effect on parameters like stress, deformation using Ansys Workbench software. It has been observed that stress and total deformation is maximum at the point of application of load.
{"title":"To Analyse Effect of Various Parameters on Pipe While Bending","authors":"Shivani S. Shahane, Nikita S. Rasate, Dhanashree D. Rane, Ramesh V. Bhandare","doi":"10.2139/ssrn.3349071","DOIUrl":"https://doi.org/10.2139/ssrn.3349071","url":null,"abstract":"In day to day life, bent tubes or pipes finds its application in various sectors like hydraulic lines, fuel lines, exhaust pipes, water lines, boiler, air conditioning, ship building, furniture, power generation, recreational vehicle, railroad, automotive, off road and farm equipment, aircraft industries and many more. Hence, the study and analysis of bent pipe has gained a huge importance .The purpose of current study is to analyze the bent pipes for various spans when load is applied to check its effect on parameters like stress, deformation using Ansys Workbench software. It has been observed that stress and total deformation is maximum at the point of application of load.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116792115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper the dynamic response of an Euler-Bernoulli beam subjected to moving mass is investigated. The beam is considered to be simply supported and the material properties vary continuously along the beam thickness according to the power law. The beam damping is described using fractional order derivative, and the governing equation of motion is solved using the decomposition method. In this study, the effect of the damping ratio and the order of the fractional derivative are investigated. The numerical results clarify the great influence of these parameters on the dynamic deflection of the beam.
{"title":"Dynamic Response of Functionally Graded Fractionally Damped Simply Supported Beam Subjected to Moving Mass","authors":"Amro A. Almbaidin, Ibrahim M. Abu-Alshaikh","doi":"10.2139/ssrn.3274036","DOIUrl":"https://doi.org/10.2139/ssrn.3274036","url":null,"abstract":"In this paper the dynamic response of an Euler-Bernoulli beam subjected to moving mass is investigated. The beam is considered to be simply supported and the material properties vary continuously along the beam thickness according to the power law. The beam damping is described using fractional order derivative, and the governing equation of motion is solved using the decomposition method. In this study, the effect of the damping ratio and the order of the fractional derivative are investigated. The numerical results clarify the great influence of these parameters on the dynamic deflection of the beam.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131292281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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