Electronic Journal of Structural Engineering最新文献_第4页

Response Prediction of VFPI Through Equivalent Long Period Wavelet of Near-Fault Ground Motion 近断层地震动等效长周期小波预测VFPI响应

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-08-11 DOI: 10.56748/ejse.222982

H. Admane, P. Murnal

{"title":"Response Prediction of VFPI Through Equivalent Long Period Wavelet of Near-Fault Ground Motion","authors":"H. Admane, P. Murnal","doi":"10.56748/ejse.222982","DOIUrl":"https://doi.org/10.56748/ejse.222982","url":null,"abstract":"Past research has revealed that a Variable Frequency Pendulum Isolator (VFPI) effectively controls the structural responses such as base shear and structural acceleration under far and near fault earthquakes and the VFPI may show excessive sliding displacement under some earthquakes having 4-6 s time-period long waves. But, the impact of the amplitude of the long period wave on the sliding displacement of VFPI is missing in past research due to difficulty in finding out the amplitude of long period wave of an earthquake. Therefore, the present study considered the amplitude of the long period wave of an earthquake to analyse the behaviour of the structure isolated by VFPI. For this, the most dangerous long period wave of earthquakes has been extracted in the form of noise free wavelets by using Mavroeidis and Papageorgiou proposed numerical approach. The results indicate that the noise free long period wavelet effectively represent the low frequency earthquake for the structure isolated by VFPI. It is also found out that, the VFPI shows the excessive sliding displacement for only those earthquakes which contains peak ground displacement of long period wave more than 0.40 m. The variation in the base shear and structural acceleration of structure isolated by VFPI under various value of Frequency Variation Factor (FVF) obey the exponential and cubic form respectively. According to this, the present research provides empirical formulas, chart, and tables to predict the structural and isolator responses by using the peak ground velocity (PGV) and dominating low frequency (fd) of a near fault earthquake.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44392724","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}

引用次数: 0

Studies on Strength of Hollow concrete Block Masonry Externally Bonded with Textile Reinforced Mortar Composites 纤维增强砂浆复合材料外粘结混凝土空心砌块的强度研究

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-08-11 DOI: 10.56748/ejse.223102

B Jeevitha, Madhavi Kancharla, S. M. Basutkar, M V Renukadevi

引用次数: 0

Technical-economic studies about the effect of Nano-carbon black on asphalt mixtures 纳米炭黑对沥青混合料影响的技术经济研究

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-08-11 DOI: 10.56748/ejse.223212

M. Zarei, A. Naseri, A. Salehikalam, Morteza Ghandehari, M. Nasrollahi, A. Dadashi

{"title":"Technical-economic studies about the effect of Nano-carbon black on asphalt mixtures","authors":"M. Zarei, A. Naseri, A. Salehikalam, Morteza Ghandehari, M. Nasrollahi, A. Dadashi","doi":"10.56748/ejse.223212","DOIUrl":"https://doi.org/10.56748/ejse.223212","url":null,"abstract":"Nanomaterial have been considered as one of the new additives by researchers for use in asphalt pavement. In this study, economic analysis along with technical analysis of the effect of different percentages of Nano carbon black on a 1 km long road was evaluated. The results showed that the addition of Nano carbon black to the asphalt mixture in low percentages reduced the Marshall stability due to the lack of proper bonding between bitumen and Nano carbon black. By increasing the percentage of Nano carbon black in the asphalt mix, Marshall Stability increased. Also, Nano carbon black has clearly shown potential for improving the permanent deformation resistance of the modified asphalt mixture. During the Marshall Quotient test, more than two times increase in rutting resistance has been observed by adding more than 10% Nano carbon black to the asphalt mixture. On the other hand, the results of economic analysis showed that the project has become uneconomic in different percentages; however, due to the positive effect of adding Nano carbon black on the technical properties of asphalt mixtures, it is recommended that Nano carbon black be used sparingly in areas where the pavement suffers from a lack of load-bearing capacity.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43602591","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}

引用次数: 1

Bond strength characterization of concrete filled steel tube as structural member 钢管混凝土作为构件的粘结强度表征

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-08-11 DOI: 10.56748/ejse.223002

Vinay Singh, P. K. Gupta, S. M. Ali Jawaid

{"title":"Bond strength characterization of concrete filled steel tube as structural member","authors":"Vinay Singh, P. K. Gupta, S. M. Ali Jawaid","doi":"10.56748/ejse.223002","DOIUrl":"https://doi.org/10.56748/ejse.223002","url":null,"abstract":"Studies done by the previous researchers in Concrete Filled Steel Tubes (CFST) have a significant focus on the bond performance of CFST. This paper includes studies on the evaluation of critical parameters such as interface condition, interface length, infilled concrete strength, and end friction and cross-section dimension in these members. It is found that the effect of interface length had very little impact on the bond stress as it shows a promising value when the interface length is in the range of 200-800 mm and after that, it gets shifted and reduced for larger interface length. But this decrease in the bond stress is affiliated with other parameters, like macro-locking, infilled concrete compressive strength distinctly affects the mean interface bond strength for the sample in the regular condition, the interface bond strength for the most part increases with infilled concrete strength. It is spotted that the friction coefficient of 0.15 is used at both column ends to provide the fixity and it becomes clear that the local buckling pattern of the stub column is independent of the end friction. In both categories of columns, the bond strength among the steel tube and infilled concrete reduced extraordinarily with increased cross-sectional dimension.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48032957","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}

引用次数: 1

The partial renovation of old factory buildings - Performance study of the inorganic vitrified micro-bubble external wall insulation system 旧厂房的局部改造——无机玻璃微泡外墙保温系统的性能研究

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-08-11 DOI: 10.56748/ejse.223182

X. Ding, W. Shang

引用次数: 0

Finite Element Analysis and simulation of missile impact on Nuclear Reactor Containment Structure 导弹撞击核反应堆安全壳结构的有限元分析与仿真

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-08-11 DOI: 10.56748/ejse.223142

Kalesh Khan A, R. M.

引用次数: 1

Finite Element Simulations of the CFRP Retrofitted Hollow Square Columns CFRP加固空心方柱的有限元模拟

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-05-31 DOI: 10.56748/ejse.2229701

M.W. Falah, Z. Al-khafaji, R. Yaseen, D.F. Yousif, K.A. Hamza, S.S. Radhi

{"title":"Finite Element Simulations of the CFRP Retrofitted Hollow Square Columns","authors":"M.W. Falah, Z. Al-khafaji, R. Yaseen, D.F. Yousif, K.A. Hamza, S.S. Radhi","doi":"10.56748/ejse.2229701","DOIUrl":"https://doi.org/10.56748/ejse.2229701","url":null,"abstract":"ABSTRACT This article describes the finite element analysis of concrete columns with a hollow square reinforced which restricted with a square Carbon-Fiber-Reinforced polymer (CFRP) tube. In this study, about sixteen square hollow core columns were investigated. These columns were classified into four sets. The set number one was the reference set which involved four unconfined reinforced columns with traditional steel helices and longitudinal steel bars. The columns of the 2nd category have a similar configuration as the set number one except that these columns were restricted outwardly by the CFRP tube. The columns of the set number were restricted outwardly by a CFRP tube and restricted inwardly by a steel tube. Finally, the columns of the 4th category do not have a steel reinforcement where they produced with only an outer CFRP tube and an inner steel tube. These columns were exposed to various loading conditions: concentric, eccentric (22 and 44) mm, and four bendings' points. It was investigated that the CFRP tube confinement faintly improved the columns’ strength. Moreover, the use of a steel tube as inner confinement in the columns with a hollow section led to improve the structural performance and ductility.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43439534","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}

引用次数: 0

Evaluation method of highway quality and safety based on finite element analysis 基于有限元分析的公路质量安全评价方法

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-05-31 DOI: 10.56748/ejse.2231901

Wei Zhao

{"title":"Evaluation method of highway quality and safety based on finite element analysis","authors":"Wei Zhao","doi":"10.56748/ejse.2231901","DOIUrl":"https://doi.org/10.56748/ejse.2231901","url":null,"abstract":"With the continuous advancement of China's transportation infrastructure, the number and proportion of highway tunnels in expressway construction are increasing year by year. In order to accurately evaluate the quality and safety of highway tunnel engineering, the finite element analysis is used to evaluate the quality of highway tunnel secondary lining structure, the slotting method is used to analyze the working stress of tunnel secondary lining structure, and the load on the secondary lining structure is inversely analyzed combined with the finite element three-dimensional model to evaluate the quality and safety of tunnel secondary lining structure. The test results show that the error rate of working stress of secondary lining structure deduced by combining slotting method and finite element analysis is 2.22%, the average error rate of vertical uniformly distributed load analysis of two lane and three lane highway tunnels is 7.09%, and the average error rate of horizontal lateral pressure coefficient analysis is 16.37%. The numerical errors are within the acceptable accuracy range of actual highway tunnel engineering. Using finite element analysis to analyze the quality and safety of highway tunnel can accurately evaluate the quality and safety of secondary lining structure of tunnel engineering, and provide effective data reference for actual quality evaluation and defect reinforcement of tunnel engineering.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49008367","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}

引用次数: 0

Durability of polypropylene fiber reinforced concrete: Literatures review 聚丙烯纤维增强混凝土的耐久性:文献综述

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-05-31 DOI: 10.56748/ejse.2225701

Omar M. Abdulkareem, R. Alshahwany, A. Mousa

引用次数: 1

Study on the frost resistance durability of recycled aggregate concrete under an extreme cold environment 极冷环境下再生骨料混凝土抗冻耐久性研究

IF 0.6

Electronic Journal of Structural Engineering Pub Date : 2022-05-31 DOI: 10.56748/ejse.2231501

Qing Su

引用次数: 1