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Analytical method for evaluating the tensioned membrane effect in the geosynthetic-reinforced unsaturated embankment soil subjected to localized sinkholes 土工合成加筋非饱和路堤土受局部陷落孔影响的张拉膜效应分析方法
IF 2.1 4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-26 DOI: 10.1080/19648189.2023.2271981
Hao-ru Zhang, Xiao-qiang Dong, Xi-dong Zhang, Ming-xing Xie
In karst regions, the occurrence of sinkholes is a common cause of roadway failures, leading to significant embankment deformation and instability. The advantages of geosynthetic reinforcement have...
在喀斯特地区,陷落孔的发生是巷道破坏的常见原因,导致路堤严重变形和失稳。土工合成钢筋具有…
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引用次数: 0
Analytical solutions for one-dimensional nonlinear large strain consolidation of soft soils with high compressibility under a multi-stage loading 高压缩性软土在多级加载下的一维非线性大应变固结的解析解
IF 2.1 4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-23 DOI: 10.1080/19648189.2023.2282560
Chao Qiu, Chuanxun Li
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引用次数: 0
Numerical modeling of trench adjacent to a shallow foundation for mitigating reverse fault rupture effects 浅基础附近海沟的数值模拟以减轻逆断层破裂的影响
IF 2.1 4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-14 DOI: 10.1080/19648189.2023.2282556
Armin Shidloon, Mehdi Ashtiani, Abbas Ghalandarzadeh
This study investigates the effectiveness of a vertical trench in mitigating the hazards associated with reverse faulting on shallow foundations and assesses the accuracy of analytical relations fo...
本文研究了垂直沟槽在减轻浅层基础上逆断层所带来的危害方面的有效性,并评估了分析关系的准确性。
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引用次数: 0
Designing sustainable high-strength self-compacting concrete with high content of supplementary cementitious materials 设计高掺量补充胶凝材料的可持续高强自密实混凝土
IF 2.1 4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-14 DOI: 10.1080/19648189.2023.2279563
Abdullah Alshahrani, Tianyi Cui, Ayman Almutlaqah, Sivakumar Kulasegaram
A sustainable and green approach to concrete mix design is fundamental for the construction sector in terms of reducing carbon dioxide (CO2) emissions and conserving non-renewable natural resources...
在减少二氧化碳(CO2)排放和保护不可再生的自然资源方面,可持续和绿色的混凝土混合设计方法是建筑部门的基础……
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引用次数: 0
Effect of loading rate on mechanical properties of autoclaved aerated concrete having steel wool fibres, construction waste and alkaline solution by employing accelerated curing 加速养护加载速率对含钢棉纤维、建筑垃圾和碱性溶液蒸压加气混凝土力学性能的影响
4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-07 DOI: 10.1080/19648189.2023.2276129
Pradyut Anand, Anand Kumar Sinha, Puja Rajhans
AbstractThis paper introduces a new method for developing Autoclaved Aerated Concrete (AAC) blocks, investigating the impact of different loading rates on compressive strength and failure behaviour. Alkaline solution and accelerated curing tank curing were explored as alternatives to conventional methods using aluminium powder and autoclave curing with fly ash. Construction and demolition waste was used as a substitute for fly ash, and chopped steel wool fibres were added to enhance block strength. The blocks were tested under various loading rates, and stress–strain graphs were generated to calculate Young’s modulus of elasticity values. ANSYS software was used for simulation and comparison, validating the accuracy of analytical models. The study shows a correlation between experimental and simulated values, confirming the successful incorporation of CDW and CSWF in AAC block development. Increasing the loading rate during testing leads to lower measured Young’s modulus, indicating strain rate dependency. However, including CSWF enhances Young’s modulus by redistributing stress and restraining crack propagation. The research contributes to understanding AAC's mechanical properties and performance, supporting its potential as a sustainable alternative for masonry materials in structural applications.Keywords: Autoclaved aerated concrete (AAC)chopped steel wool fibres (CSWF)construction and demolition waste (CDW)loading ratestress – strain graphyoung’s modulus of elasticity (E) AcknowledgementThe authors would like to acknowledge Birla Institute of Technology Mesra, Ranchi, India, for providing seed funding for the raw materials necessary for experimental observations and research.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementAll data and models generated or used during the study appear in the submitted article.
摘要本文介绍了一种开发蒸压加气混凝土(AAC)砌块的新方法,研究了不同加载速率对其抗压强度和破坏行为的影响。探索了碱液和加速固化槽固化替代铝粉和粉煤灰蒸压罐固化的方法。以建筑垃圾代替粉煤灰,加入碎钢棉纤维提高砌块强度。在不同加载速率下对砌块进行试验,生成应力-应变图,计算弹性模量。利用ANSYS软件进行仿真对比,验证了分析模型的准确性。研究表明,实验值与模拟值之间存在一定的相关性,证实了CDW和CSWF在AAC区块开发中的成功结合。在测试过程中增加加载速率导致测量的杨氏模量降低,表明应变速率依赖性。然而,加入CSWF通过重新分配应力和抑制裂纹扩展来提高杨氏模量。该研究有助于了解AAC的机械性能和性能,支持其作为砌体材料在结构应用中的可持续替代品的潜力。关键词:蒸压加气混凝土(AAC)短切钢棉纤维(CSWF)建筑垃圾(CDW)加载速率应力-应变图杨氏弹性模量(E)致谢作者要感谢印度梅斯拉市Birla理工学院为实验观察和研究所需的原材料提供种子资金。披露声明作者未报告潜在的利益冲突。数据可用性声明在研究过程中生成或使用的所有数据和模型都出现在提交的文章中。
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引用次数: 0
Intelligent modelling of unconfined compressive strength of cement stabilised iron ore tailings: a case study of Golgohar mine 水泥稳定铁矿尾矿无侧限抗压强度智能建模——以果尔戈哈尔矿为例
4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-06 DOI: 10.1080/19648189.2023.2276133
Ali Reza Ghanizadeh, Farzad Safi Jahanshahi, Seyed Saber Naseralavi
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引用次数: 0
Investigation of the behaviour of adhesively bonded joints between timber and self-compacting concrete 木材与自密实混凝土粘结接头性能的研究
4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-06 DOI: 10.1080/19648189.2023.2276132
Mohammed Shehada, Zakaria Ilyes Djamaï, Frédéric Duprat
AbstractComposite constructions made of wood and concrete are being researched as revolutionary structural components that offer many benefits. The connection in timber-concrete-composite (TCC) is typically made via mechanical means. This study describes the TCC bonded by adhesives, particularly the mechanical behaviour of the joints between timber (GL24h) and self-compacting concrete (SCC) set by the dry or wet bonding process. For this purpose, double push-out shear tests on TCC joints bonded by epoxy resin of adhesives were performed. The role of several variables was considered for both fabrication processes. These parameters were: variation of moisture content (m.c.) of timber, adhesive type, adhesive thickness, sand addition, concrete surface treatment, and scale of bonding length. The results showed that glueing seems to be a feasible alternative instead of mechanical means for producing dry and wet TCC joints. Under dry conditions of timber elements, the shear strength can be considered highly satisfactory, with a mean value range of 6–8 MPa. The failure mode is primarily affected by concrete and timber failure. However, the findings of this study confirm the hypothesis that increasing the moisture content of timber before the gluing process significantly reduces the shear strength of adhesively bonded TCC joints by approximately 30% in certain instances. These results contribute to understanding the challenges and limitations of the bonding system, providing valuable insights for optimizing the design and manufacturing of timber-concrete composites.Keywords: Timber-concrete compositesshear strengthpush-out testepoxy adhesive bonding AcknowledgementsThe authors would like to thank and acknowledge technicians from the National Institute of Applied Sciences of Toulouse, and GA Smart Building Co., for their assistance during the experimental works. The appreciation would also be extended to SIKA Co. for gracefully supplying resins and discussing the mechanical performance of used resins.Disclosure statementThe authors have no competing interests to declare that are relevant to the content of this article.Data availability statementThe raw data required to reproduce these findings are available from the corresponding author upon reasonable request.Additional informationFundingThe research was financially supported by the GA Smart Building Co.
摘要由木材和混凝土组成的复合结构作为具有许多优点的革命性结构构件正在被研究。木-混凝土复合材料(TCC)的连接通常是通过机械手段进行的。本研究描述了胶粘剂粘合的TCC,特别是木材(GL24h)和自密实混凝土(SCC)之间的接缝的机械行为,这些接缝是由干或湿粘合过程设置的。为此,对环氧树脂胶粘剂粘结的TCC接头进行了双推力剪切试验。考虑了两个制造过程中几个变量的作用。这些参数是:木材含水率变化、胶粘剂类型、胶粘剂厚度、加砂量、混凝土表面处理、粘接长度尺度。结果表明,胶合似乎是一种可行的替代机械手段,以生产干湿TCC接头。在木材构件干燥条件下,抗剪强度可以认为是非常令人满意的,其平均值范围为6 - 8mpa。破坏模式主要受混凝土和木材破坏的影响。然而,本研究的结果证实了一个假设,即在粘合过程之前增加木材的含水率,在某些情况下会显著降低粘接TCC接头的抗剪强度,降低幅度约为30%。这些结果有助于理解粘合系统的挑战和局限性,为优化木-混凝土复合材料的设计和制造提供有价值的见解。关键词:木结构-混凝土复合材料;抗剪强度;推出试验;环氧胶粘接致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢致谢感谢西卡公司提供的树脂,并讨论了废旧树脂的机械性能。声明作者没有与本文内容相关的竞争利益需要声明。数据可用性声明复制这些发现所需的原始数据可在合理要求下从通讯作者处获得。本研究由GA智能建筑公司提供资金支持。
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引用次数: 0
In-plane shear behaviour of concrete sandwich panels reinforced with various geogrids 各种土工格栅加固混凝土夹芯板的面内剪切性能
4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-11-02 DOI: 10.1080/19648189.2023.2276141
Upender Bishnoi, A. B. Danie Roy, Naveen Kwatra
AbstractSeismic occurrences have caused severe damage and even the collapse of fragile unreinforced masonry structures. New technologies are replacing these conventional methods of construction; concrete sandwich panels (CSP) are one such technique gaining popularity. In-plane diagonal shear strength of concrete sandwich panels is studied experimentally, and the effect of incorporating geogrids on the deformation capability and load-bearing capacity is reported. Two forms of geogrid material, plastic uniaxial geogrid (PUG) and polyester biaxial geogrids (PBG2 and PBG3) are used to improve the strength and ductility of concrete sandwich panels. Diagonal compression tests have been carried out better to understand the behavior of CSP under in-plane strength. This paper also discusses the effect of the different mixes, the effect of geogrids, load-deformation behaviour, shear capacity, deflection ductility factor, mode of failure, shear strength, and energy dissipation. In contrast to the control specimen, specimens cast with plastic geogrid had a 13.7% and 26% improvement in shear capacity and load-bearing capability for the two types of micro-concrete mixes used in this study. The conclusion reached is that plastic uniaxial geogrid is effective in improving the concrete sandwich panels’ load-bearing capacity, shear capacity, and deformation ability. Polyester biaxial geogrids enhanced the ductility of the concrete sandwich panels.Keywords: Concrete sandwich panelIn-plane diagonal compressiongeogridsenergy dissipation Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe data that support the findings of this study are available from the corresponding author, upon reasonable request.
摘要地震的发生会对脆弱的未加筋砌体结构造成严重的破坏甚至倒塌。新技术正在取代这些传统的建造方法;混凝土夹芯板(CSP)就是这样一种越来越受欢迎的技术。试验研究了混凝土夹芯板的面内斜抗剪强度,并报道了加装土工格栅对夹芯板变形能力和承载能力的影响。采用塑料单轴土工格栅(PUG)和聚酯双轴土工格栅(PBG2和PBG3)两种形式的土工格栅材料来提高混凝土夹芯板的强度和延性。为了更好地了解CSP在面内强度作用下的性能,进行了斜向压缩试验。本文还讨论了不同混合料的影响,土工格栅的影响,荷载-变形行为,抗剪能力,挠曲延性系数,破坏模式,抗剪强度和能量耗散。与对照试件相比,采用塑料土工格栅浇筑的两种微混凝土试件抗剪承载力和承载能力分别提高了13.7%和26%。得出塑性单轴土工格栅对提高混凝土夹芯板的承载能力、抗剪能力和变形能力是有效的结论。聚酯双轴土工格栅增强了混凝土夹芯板的延展性。关键词:混凝土夹芯板面内斜压地格栅耗能披露声明作者未报告潜在利益冲突。数据可用性声明支持本研究结果的数据可在合理要求下从通讯作者处获得。
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引用次数: 0
Shrinkage performance and modelling of concretes incorporating crushed limestone sand with a high content of fillers for pavement slabs 混凝土的收缩性能和模型结合碎石石灰石砂与高含量的填充物路面板
4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-10-31 DOI: 10.1080/19648189.2023.2276128
Amal Bousleh, Saloua El Euch Khay
AbstractBecause of the gradual depletion of gravel and river sand resources and restrictions on quarrying activities to maintain the ecological balance, limestone crushed sand with a high content of limestone fillers is being explored to be used, as an alternative source of supply, in Portland cement concrete (PCC) for rigid pavement. This paper aims to first present mechanical test results carried out on three types of PCC formulated with crushed limestone sand as fine aggregates, devoid of superplasticizers. Since shrinkage cracking is an important problem for rigid pavement, the shrinkage behaviour of these concretes is then experimentally investigated. Furthermore, three existing models (ACI-209, Eurocode2, and triple-sphere models) and a novel-developed model are used to estimate the mixtures’ shrinkage. Results showed that the designed mixtures exhibited normal shrinkage values. The shrinkage modelling revealed that the proposed model well fitted the experimental data. Besides, Eurocode2 and ACI-209 models may be adapted for the case of limestone concretes containing a high content of limestone fillers and then used to accurately estimate their shrinkage strains. However, the triple-sphere model was unsuitable for these concretes and overestimated their ultimate shrinkage since it does not take into account their high filler content. Nevertheless, by adjusting the paste shrinkage expression, the ultimate shrinkage strain values of the tested mixtures were improved.Keywords: Rigid pavementconcretecrushed limestone sandShrinkagemodelling Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe data that support the findings of this study are openly available in Mendeley data at http://doi.org/ 10.17632/d828k98rrk.1.
摘要由于砾石和河砂资源的逐渐枯竭,以及为了维持生态平衡而限制采石活动,人们正在探索将石灰石填料含量高的石灰石碎砂作为一种替代供应来源,用于硅酸盐水泥混凝土(PCC)的刚性路面。本文首先介绍了以石灰石碎砂为细集料,不含高效减水剂配制的三种PCC的力学试验结果。由于收缩开裂是刚性路面的一个重要问题,因此对这些混凝土的收缩行为进行了实验研究。采用ACI-209、Eurocode2和三球模型和一个新开发的模型对混合料的收缩进行了估计。结果表明,设计的混合料具有正常的收缩值。收缩模型表明,该模型与实验数据拟合较好。此外,Eurocode2和ACI-209模型可适用于石灰石混凝土含有高含量石灰石填料的情况,然后用于准确估计其收缩应变。然而,三球模型不适合这些混凝土,高估了它们的最终收缩率,因为它没有考虑到它们的高填料含量。通过调整膏体收缩表达式,提高了试验混合料的极限收缩应变值。关键词:刚性路面混凝土冲砂石灰石收缩模型披露声明作者未报告潜在利益冲突。数据可用性声明支持本研究结果的数据可在Mendeley数据中公开获取,网址为http://doi.org/ 10.17632/d828k98rrk.1。
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引用次数: 0
Strain hardening composite made of LC3 binder and mineral impregnated carbon yarn: effect of crystalline admixture on mechanical characteristics and microstructure LC3粘结剂与矿物浸渍碳纱应变硬化复合材料:结晶掺合物对力学性能和微观结构的影响
4区 工程技术 Q2 ENGINEERING, CIVIL Pub Date : 2023-10-31 DOI: 10.1080/19648189.2023.2276126
Smitha Gopinath, Marko Butler, Viktor Mechtcherine
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引用次数: 0
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European Journal of Environmental and Civil Engineering
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