Pub Date : 2020-12-18DOI: 10.19080/cerj.2020.11.555807
Alexander Kalaydo V
{"title":"Passive Technologies for Providing Radiation Safety of Buildings at the Design Stage","authors":"Alexander Kalaydo V","doi":"10.19080/cerj.2020.11.555807","DOIUrl":"https://doi.org/10.19080/cerj.2020.11.555807","url":null,"abstract":"","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79556203","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 : 2020-12-10DOI: 10.19080/CERJ.2020.11.555806
V. Smolentsev
The results of research on the stabilization of the geometric dimensions of large hull blocks obtained using welded joints are presented. The connection between the change in the construction geometry and the modes of strengthening by vibration effects caused by controlled electromagnetic pulses with the imposition of an electric field is shown. The ways of controlling multiple mechanical impulses to strengthen the surface layer and equalize the internal stresses of the mating parts are shown, which allows reducing errors after welding. Developed methodology for designing a combined technological process for pulse stabilization of the geometry of workpieces.
{"title":"Magnetic Pulse Stabilization of the Geometry of Prefabricated Products","authors":"V. Smolentsev","doi":"10.19080/CERJ.2020.11.555806","DOIUrl":"https://doi.org/10.19080/CERJ.2020.11.555806","url":null,"abstract":"The results of research on the stabilization of the geometric dimensions of large hull blocks obtained using welded joints are presented. The connection between the change in the construction geometry and the modes of strengthening by vibration effects caused by controlled electromagnetic pulses with the imposition of an electric field is shown. The ways of controlling multiple mechanical impulses to strengthen the surface layer and equalize the internal stresses of the mating parts are shown, which allows reducing errors after welding. Developed methodology for designing a combined technological process for pulse stabilization of the geometry of workpieces.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88969546","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 : 2020-12-03DOI: 10.19080/CERJ.2020.11.555804
Xianxian Tao
A set of shaking table model tests of hydrodynamic pressures on bridge piers are presented in this paper. Five models made of Perspex and concrete with rectangular, elliptical and variable sections are built, and fixed in a steel tank on shaking table with 0.9 m to 1.6 m water, respectively. The seismic hydrodynamic pressures observed at 4/7/8 submerged depths from two level inputs of ground motions and two direction combinations show that the representative values per unit area increase with submerged depth obviously, the increasing rate is generally faster than those by the two classical assumptions at shallow depth, but slower at deep depth.
{"title":"A Set of Shaking Table Model Tests of Seismic Hydrodynamic Pressure on Bridge Pier with Submerged Depth","authors":"Xianxian Tao","doi":"10.19080/CERJ.2020.11.555804","DOIUrl":"https://doi.org/10.19080/CERJ.2020.11.555804","url":null,"abstract":"A set of shaking table model tests of hydrodynamic pressures on bridge piers are presented in this paper. Five models made of Perspex and concrete with rectangular, elliptical and variable sections are built, and fixed in a steel tank on shaking table with 0.9 m to 1.6 m water, respectively. The seismic hydrodynamic pressures observed at 4/7/8 submerged depths from two level inputs of ground motions and two direction combinations show that the representative values per unit area increase with submerged depth obviously, the increasing rate is generally faster than those by the two classical assumptions at shallow depth, but slower at deep depth.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83985016","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 : 2020-11-18DOI: 10.19080/CERJ.2020.11.555803
G. PavelYeremeyev
A great number of unique wide-span structures have been built in Russia in recent years. More than 30 new stadiums and covered arenas have been or are being built for the 2014 Winter Olympics and the 2018 Football World Cup. The most interesting of these are briefly described below. The objects were designed, manufactured and erected with the participation of TsNIISK.
{"title":"Modern Wide-span Spatial Metal Structures in Russia","authors":"G. PavelYeremeyev","doi":"10.19080/CERJ.2020.11.555803","DOIUrl":"https://doi.org/10.19080/CERJ.2020.11.555803","url":null,"abstract":"A great number of unique wide-span structures have been built in Russia in recent years. More than 30 new stadiums and covered arenas have been or are being built for the 2014 Winter Olympics and the 2018 Football World Cup. The most interesting of these are briefly described below. The objects were designed, manufactured and erected with the participation of TsNIISK.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87485081","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 : 2020-09-24DOI: 10.19080/cerj.2020.10.555797
Malyuk Vv
The article provides an analysis of the operating conditions of port facilities in heavy hydrometeorological conditions on the coast of Sakhalin Island to establish durability characteristics for the development of design life models. Typical types of concrete destruction in the zone of variable level are considered. The directions of research in the field of forecasting the durability of concrete and reinforced concrete structures for seaport facilities on actual durability characteristics are outlined.
{"title":"Climatic Conditions and Experience of Operation of Port Facilities on Sakhalin Island","authors":"Malyuk Vv","doi":"10.19080/cerj.2020.10.555797","DOIUrl":"https://doi.org/10.19080/cerj.2020.10.555797","url":null,"abstract":"The article provides an analysis of the operating conditions of port facilities in heavy hydrometeorological conditions on the coast of Sakhalin Island to establish durability characteristics for the development of design life models. Typical types of concrete destruction in the zone of variable level are considered. The directions of research in the field of forecasting the durability of concrete and reinforced concrete structures for seaport facilities on actual durability characteristics are outlined.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76766424","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 : 2020-09-21DOI: 10.19080/cerj.2020.10.555796
S. Sk
Fatigue cracking is very critical among all types of distresses in pavements once the fatigue crack start in pavement it led to fast pavement deterioration and thus reduced the life of pavement and quality of riding on pavement. Thus, to control such distress it is necessary to understand the mechanics behind such crack initiation and propagation and to find the fracture parameters to choose best mixture to resist the failure. There are various methods to understand the fracture properties of the bituminous concrete (BC) mix. This paper describes the semi-circular bending test for BC mix, which was designed to be very effective, and user friendly. This method is adopted because it simulates the field conditions and its availability. Semi-circular samples of forty-eight were prepared out of which half was made of unmodified bitumen and the rest were made of plastic modified bitumen. These all samples were then tested at different loading rates and value of load at each deflection is measured. Two fracture parameters like fracture energy and stress intensity factor are evaluated. The plastic modified bituminous concrete shows that the value of energy is increased 2 to 3 times than the unmodified bituminous concrete at intermediate temperature. Hence, plastic modified bituminous concrete has the greater cracking resistance potential.
{"title":"Evaluation of Crack Potency in the Bituminous Concrete using Fracture Mechanics Parameters","authors":"S. Sk","doi":"10.19080/cerj.2020.10.555796","DOIUrl":"https://doi.org/10.19080/cerj.2020.10.555796","url":null,"abstract":"Fatigue cracking is very critical among all types of distresses in pavements once the fatigue crack start in pavement it led to fast pavement deterioration and thus reduced the life of pavement and quality of riding on pavement. Thus, to control such distress it is necessary to understand the mechanics behind such crack initiation and propagation and to find the fracture parameters to choose best mixture to resist the failure. There are various methods to understand the fracture properties of the bituminous concrete (BC) mix. This paper describes the semi-circular bending test for BC mix, which was designed to be very effective, and user friendly. This method is adopted because it simulates the field conditions and its availability. Semi-circular samples of forty-eight were prepared out of which half was made of unmodified bitumen and the rest were made of plastic modified bitumen. These all samples were then tested at different loading rates and value of load at each deflection is measured. Two fracture parameters like fracture energy and stress intensity factor are evaluated. The plastic modified bituminous concrete shows that the value of energy is increased 2 to 3 times than the unmodified bituminous concrete at intermediate temperature. Hence, plastic modified bituminous concrete has the greater cracking resistance potential.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88059500","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 : 2020-09-17DOI: 10.19080/cerj.2020.10.555795
B. Al-Omari
This study aimed at investigating parking demand at elementary and secondary schools in Irbid city; the second largest city in Jordan, to identify the main influencing factors, and develop models to predict future demand based on local conditions. The major considered factors included school area, number of students, number of teachers, number of classrooms, gender of students, education level (elementary, secondary), and school ownership (public, private). A total of 118 different types of schools were surveyed from different areas in Irbid City. The required field data were collected on regular weekdays by field surveys and manual counting for the total number of parked vehicles and the variation during the schools working hours, while schools descriptive information’s were obtained from the directorate of education in Irbid city. Peak demand models for different types of schools were developed using multiple linear regression analysis by SPSS software. The results of the study showed that the main affecting factors on school parking demand include the total number of students, classrooms, and teachers. However, more focus was given to the number of students due to collinearity among these main independent variables and to be consistent with the international practice.
{"title":"Parking Demand for Elementary & Secondary Schools in Jordan","authors":"B. Al-Omari","doi":"10.19080/cerj.2020.10.555795","DOIUrl":"https://doi.org/10.19080/cerj.2020.10.555795","url":null,"abstract":"This study aimed at investigating parking demand at elementary and secondary schools in Irbid city; the second largest city in Jordan, to identify the main influencing factors, and develop models to predict future demand based on local conditions. The major considered factors included school area, number of students, number of teachers, number of classrooms, gender of students, education level (elementary, secondary), and school ownership (public, private). A total of 118 different types of schools were surveyed from different areas in Irbid City. The required field data were collected on regular weekdays by field surveys and manual counting for the total number of parked vehicles and the variation during the schools working hours, while schools descriptive information’s were obtained from the directorate of education in Irbid city. Peak demand models for different types of schools were developed using multiple linear regression analysis by SPSS software. The results of the study showed that the main affecting factors on school parking demand include the total number of students, classrooms, and teachers. However, more focus was given to the number of students due to collinearity among these main independent variables and to be consistent with the international practice.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82961316","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 : 2020-09-16DOI: 10.19080/cerj.2020.10.555794
Jindřich Svatoš
Vienna University of Economics (WU), which is one of the largest universities in Europe, currently has about 23,000 students and approximately 1,500 teachers. WU has opened a new campus in 2013. Studio which was selected for the development of the site plan was chosen on the basis of the competition for Austrian and German architects in 2007. The following year, an international competition was announced for individual buildings of the campus. What does the realization of this plan looks like? Was it possible to build this campus quite near the center of Vienna? Where does this incredible number of students fit? How do they live and study there? Is it possible for a total of six teams of architects from around the world to design a campus of the future together? What is the transport solution for such a complex? How to study and how to live in the space created like this? What is the public space of this campus about? These and other questions will be answered from the architect’s point of view as well as from the perspective as an ordinary visitor of this interesting area.
{"title":"Campus of Vienna University of Economics and Business","authors":"Jindřich Svatoš","doi":"10.19080/cerj.2020.10.555794","DOIUrl":"https://doi.org/10.19080/cerj.2020.10.555794","url":null,"abstract":"Vienna University of Economics (WU), which is one of the largest universities in Europe, currently has about 23,000 students and approximately 1,500 teachers. WU has opened a new campus in 2013. Studio which was selected for the development of the site plan was chosen on the basis of the competition for Austrian and German architects in 2007. The following year, an international competition was announced for individual buildings of the campus. What does the realization of this plan looks like? Was it possible to build this campus quite near the center of Vienna? Where does this incredible number of students fit? How do they live and study there? Is it possible for a total of six teams of architects from around the world to design a campus of the future together? What is the transport solution for such a complex? How to study and how to live in the space created like this? What is the public space of this campus about? These and other questions will be answered from the architect’s point of view as well as from the perspective as an ordinary visitor of this interesting area.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85628704","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 : 2020-09-10DOI: 10.19080/cerj.2020.10.555793
T. Weifner
In finite element simulations of deep tunnels an appropriate selection of the boundary conditions at the border of the model is important. Commonly, a system with vertically and horizontally fixed boundaries is used for finite element calculations of deep tunnels. In the contribution the shortcomings of this assumption will be explained and the requirements to the model size, which should be considered for this type of boundary conditions, are discussed. An alternative approach is also presented, which is derived from a commonly used approach for c and has been adapted to deep tunnels.
{"title":"The Selection of Suitable Boundary Conditions for Finite Element Simulations of Deep Tunnels","authors":"T. Weifner","doi":"10.19080/cerj.2020.10.555793","DOIUrl":"https://doi.org/10.19080/cerj.2020.10.555793","url":null,"abstract":"In finite element simulations of deep tunnels an appropriate selection of the boundary conditions at the border of the model is important. Commonly, a system with vertically and horizontally fixed boundaries is used for finite element calculations of deep tunnels. In the contribution the shortcomings of this assumption will be explained and the requirements to the model size, which should be considered for this type of boundary conditions, are discussed. An alternative approach is also presented, which is derived from a commonly used approach for c and has been adapted to deep tunnels.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75358327","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 : 2020-09-07DOI: 10.19080/cerj.2020.10.555792
Taraneh Ardalan
The needs for the growing and aging population, increased urbanization, and sustainability goals are all challenging the cities and suburban areas in different ways. As a result, administrators are dealing with the effects of traffic congestion, under-utilized public transit systems, limited funds, and increased problems with environmental impacts. Even if still emerging, many regard mobility as a Service (MaaS) to be an approach that could help authorities develop transport services and reduce some of the problems facing the system. However, several factors are being involved in MaaS that should be considered for specific regions with specific features. This article is the author’s opinion regarding the application of MaaS in the region of Florida, United States.
{"title":"Mobility as a Service: A solution to traffic congestion in Florida","authors":"Taraneh Ardalan","doi":"10.19080/cerj.2020.10.555792","DOIUrl":"https://doi.org/10.19080/cerj.2020.10.555792","url":null,"abstract":"The needs for the growing and aging population, increased urbanization, and sustainability goals are all challenging the cities and suburban areas in different ways. As a result, administrators are dealing with the effects of traffic congestion, under-utilized public transit systems, limited funds, and increased problems with environmental impacts. Even if still emerging, many regard mobility as a Service (MaaS) to be an approach that could help authorities develop transport services and reduce some of the problems facing the system. However, several factors are being involved in MaaS that should be considered for specific regions with specific features. This article is the author’s opinion regarding the application of MaaS in the region of Florida, United States.","PeriodicalId":30320,"journal":{"name":"Constructii Journal of Civil Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85508315","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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