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Electronic Journal of Structural Engineering最新文献

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The Effect of Plastic Hinge Location on the Flexural Strength Demand of Welded Flange Plate Connections 塑性铰位置对焊接法兰板连接抗弯强度需求的影响
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2019-12-01 DOI: 10.56748/ejse.19237
J. K. Hsiao, S. Shrestha, Venkat Ramana Reddy Vootukuri, F. Mensah
{"title":"The Effect of Plastic Hinge Location on the Flexural Strength Demand of Welded Flange Plate Connections","authors":"J. K. Hsiao, S. Shrestha, Venkat Ramana Reddy Vootukuri, F. Mensah","doi":"10.56748/ejse.19237","DOIUrl":"https://doi.org/10.56748/ejse.19237","url":null,"abstract":"A Welded Flange Plate (WFP) connection consists of top and bottom flange plates that are fillet welded to the flanges of a beam and are complete joint penetration groove welded to a column flange. Four WFP design examples including various beam sizes, beam lengths, and/or assumed plastic hinge locations are presented in this paper. In these design examples, the relationships among the following three factors are in-vestigated: the assumed location of the plastic hinge, the probable peak flexural demand at the end of the beam, and the required length of the flange plates for the WFP connections. Nonlinear static finite element analyses considering both the material and geometric nonlinearities are also carried out for these examples to verify the actual location of the plastic hinge as well as the relationship between the actual location of the plastic hinge and the length of the flange plates used for the WFP connections.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42848610","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
Bearing Capacity of Strip Footing Built on Geogrid-Reinforced Sand over Soft Clay Slope and Subjected to a Vertical Load 软土边坡土工格栅加筋砂条形基脚在竖向荷载作用下的承载力
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2019-12-01 DOI: 10.56748/ejse.19232
A. Hamidi, K.Abbeche
{"title":"Bearing Capacity of Strip Footing Built on Geogrid-Reinforced Sand over Soft Clay Slope and Subjected to a Vertical Load","authors":"A. Hamidi, K.Abbeche","doi":"10.56748/ejse.19232","DOIUrl":"https://doi.org/10.56748/ejse.19232","url":null,"abstract":"The present work deals with the study of the behavior of a rigid striped footing, resting on a sand slope reinforced by geo-grids and located above a soft clay layer. For this purpose, numerical analysis was conducted using finite element program; Plaxis software package; where the effects of some parameters on the strip footing behavior were studied. The affecting parameters such as the number of layers of geogrids, the vertical spacing, and the slope of the sand, the depth of reinforcement and the angle of friction of the sand were considered in soil reinforcement by geogrids based on multi-series of tests. The analysis results show an improvement in the soil bearing capacity at the level of the reinforcement depth, whatever the slope of the sand and its density (loose, moderately dense and dense). This improvement was related to the important number of reinforcing elements represented by a small vertical spacing of strips. Whereas, a significant dete-rioration of the soil bearing capacity was detected in the case of steep slopes of sand whatever the number of reinforcing strips and their vertical spacing.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49325605","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
Shear Strengthening of RC Beams Using NSM GFRP Bars or CFRP U-Wrap Sheets 用NSM GFRP钢筋或CFRP U型包布加固钢筋混凝土梁
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2019-12-01 DOI: 10.56748/ejse.19238
E.Y. Sayed-Ahmed, M.N. Abou-Zeid, Helen S. Ghali, Haidy S. Ghali, R.M. Armanious
{"title":"Shear Strengthening of RC Beams Using NSM GFRP Bars or CFRP U-Wrap Sheets","authors":"E.Y. Sayed-Ahmed, M.N. Abou-Zeid, Helen S. Ghali, Haidy S. Ghali, R.M. Armanious","doi":"10.56748/ejse.19238","DOIUrl":"https://doi.org/10.56748/ejse.19238","url":null,"abstract":"Fiber-reinforced polymers (FRPs) have been in view for the past three decades due to their high strength-to-weight ratio and resistance to corrosion. They are widely used as sheets, externally adhered to re-inforced concrete (RC) beams to be strengthened in shear. Although this technique is common, FRP sheets are exposed during their service life to environmental factors. As such, near-surface mounted (NSM) FRP bars may be more favored in shear strengthening of RC beams. Thus, this work experimentally investigates the performance of RC beams strengthened in shear using NSM FRP bars. The experimental results are com-pared to provisions of ACI 440.2-08 for FRP laminates and to design procedures proposed by De Lorenzis and Nanni (2001) and Dias and Barros (2010) for NSM bars. The current investigation reveals that ACI 440.2-08 overestimate the shear capacity of strengthened beams for widely spaced FRP laminate; thus, an up-per limit on the spacing between the sheets should be included in the current provisions. On the other hand, De Lorenzis and Nanni model correctly predicts the capacity of beams strengthened in shear using NSM bar; however, this model still needs a limit on the minimum spacing between the NSM bars.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47249933","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
Control Management of Construction Cost of Prefabricated Residential Buildings 装配式住宅建筑造价控制管理
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182702
X. L.Zhu, H. Zhang
{"title":"Control Management of Construction Cost of Prefabricated Residential Buildings","authors":"X. L.Zhu, H. Zhang","doi":"10.56748/ejse.182702","DOIUrl":"https://doi.org/10.56748/ejse.182702","url":null,"abstract":"The acceleration of construction of cities and towns motivates the development of the construction industry. Prefabricated residential building is extensively concerned by the public for its small damages to the surrounding environment and high quality. In this study, different construction stages of the prefabricated residential building were analyzed, and factors influencing the construction cost in different stages were discussed. The construction technique, speed, civil work cost and environmental benefits were compared between the traditional concrete building and the prefabricated residential building. Moreover the differences of costs in different stages were compared in a real case. Several effective measures for controlling construction cost were put forward. The results demonstrated that the cost of the prefabricated residential building was much lower than that of the traditional concrete building. The suggestions for reducing construction cost can provide a reference for similar projects.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44672208","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
The Flexural Ductility Behavior of Reinforced Concrete Beams with Tension Lap Splices Exposed to Fire 受火条件下受拉搭接钢筋混凝土梁的抗弯延性
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182622
Masood M.M. Irheem, Omar A. El-Nawawy, Hatem H. Gheith, Ayman S. Abo-Beah
{"title":"The Flexural Ductility Behavior of Reinforced Concrete Beams with Tension Lap Splices Exposed to Fire","authors":"Masood M.M. Irheem, Omar A. El-Nawawy, Hatem H. Gheith, Ayman S. Abo-Beah","doi":"10.56748/ejse.182622","DOIUrl":"https://doi.org/10.56748/ejse.182622","url":null,"abstract":"Based on a comprehensive review of both previous studies and implemented practices in the field of construction structures, it’s obvious that reinforcing steel bar’s length is limited. Consequently, lap-splices are commonly used in reinforced concrete (RC) structures to solve such problem. Generally, in the design process,safety and serviceability must be satisfied. In essence, in beams with lap splices it’s important to check the ductility, since some variables as fire of RC beams can change the behavior. The present paper aims to validate the effect of fire on the flexural ductility behavior of reinforced concrete beam with lap splice. An experimentaltest Program of thirteen simply supported RC beams with lap-splices were designed, cast and tested in laboratory. The main selected variables are: concrete cover, temperature and fire exposure duration. Results show that; under fire effect with different concrete cover, duration and temperature over the lap-splices zone has major effects on the ductility of RC beams. As, the ductility of beams decreases when the temperature and fire duration increases. Furthermore, ductility of RC beams increases as concrete cover increases under similar conditions. Collectively,this study shows that the fire has a major effect on the bond strength of lap-spliced RC beams and ductility has different behavior when compared with non-fired beam. Consequently, codes have to take fire effects on the lapsplice in design process.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45013048","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
Uniaxial Dynamic Tensile Properties of Hydraulic Concrete after Freezing-Thawing Cycles 冻融循环后水工混凝土单轴动态拉伸性能研究
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182682
Haitao Wang, Haoyu Sun, Xinxin Zhuang
{"title":"Uniaxial Dynamic Tensile Properties of Hydraulic Concrete after Freezing-Thawing Cycles","authors":"Haitao Wang, Haoyu Sun, Xinxin Zhuang","doi":"10.56748/ejse.182682","DOIUrl":"https://doi.org/10.56748/ejse.182682","url":null,"abstract":"In this paper, freeze-thaw cycles tests of 0, 25, 50, 75 and 100 times for large aggregate concrete were carried out and uniaxial dynamic tensile tests under the strain rates of 10-5/s, 10-4/s, 10-3/s and 10-2/s were also performed. The damage morphology of the specimens after freezing-thawing cycles was observed, the mass loss after different freezing-thawing cycles, the dynamic ultimate tensile strength, peak strain and the relationship of stress-strain under different strain rates were measured. The results showed that relation curve between the mass loss of large aggregate concrete and the freezing-thawing cycles was quadratic. Under the same strain rate, the dynamic ultimate tensile strength and the peak strain decreased withthe increase of freezing-thawing cycles. With the same freezing-thawing cycles and the increase of strain rate, the dynamic ultimate tensile strength increased, while the peak strain decreased. According to the test date, the incremental portion of stress-strain curve was fitted and the failure criterion of large aggregate concrete under dynamic uniaxial tensile stress was established, which could provide the theoretical reference for the design and maintenance of large aggregate structures.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48027137","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
Numerical Simulation of Stretch Bending for L-section Aluminum Alloy Profile l型铝合金型材拉伸弯曲的数值模拟
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182652
Y. Liu, L. Song, J Yin, F Ma, Z. Sha, D Yang, S. Zhang
{"title":"Numerical Simulation of Stretch Bending for L-section Aluminum Alloy Profile","authors":"Y. Liu, L. Song, J Yin, F Ma, Z. Sha, D Yang, S. Zhang","doi":"10.56748/ejse.182652","DOIUrl":"https://doi.org/10.56748/ejse.182652","url":null,"abstract":"High precision stretch bending of aluminum alloy profile is the key technology for making car’s frame body. A numerical simulation study on the displacement-controlled process for a typical kind of L-section aluminum alloy profile used in high-speed rail with finite element analysis software is presented. The effect of different friction coefficients, with or without baffle and cover plate on the equivalent stress,strain and cross-sectional distortion are investigated. It is shown that the increase of the friction coefficient can increase the cross-sectional distortion, equivalent stress and strain. The installation of baffle and cover plate can significantly reduce the cross-sectional distortion in the middle section of the profile, and increase the equivalent stress and strain to some extent.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47001284","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
The Effects of Insulation Thickness on Temperature Field and Evaluating Cracking in the Mass Concrete 保温厚度对大体积混凝土温度场的影响及裂缝评定
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182722
N.T. Chuc, Le Quy Don, P.V. Thoan, B.A. Kiet
{"title":"The Effects of Insulation Thickness on Temperature Field and Evaluating Cracking in the Mass Concrete","authors":"N.T. Chuc, Le Quy Don, P.V. Thoan, B.A. Kiet","doi":"10.56748/ejse.182722","DOIUrl":"https://doi.org/10.56748/ejse.182722","url":null,"abstract":"This paper is mainly to study the effects of insulation thickness (0 - 3) cm on temperature field and evaluating cracking in the mass concrete by using Finite Element Midas Civil 2011. The finite element method is developed for simulation analysis of the temperature field in the concrete in early age mass concrete. From the results temperature field and evaluating cracking for the mass concrete it is concluded that insulation with adequate thickness at the face of massive concrete should be used to reduce the temperature differentials and control cracking of early-age concrete. Finally, the results are applied to provide some references for the constructions in the mass concrete such as dams, bridges beams, bridge piers, foundations of bridges and buildings.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49100199","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: 10
Enhancing the Durability Properties of Concrete prepared with Multiwalled Carbon Nanotubes 提高多壁碳纳米管混凝土耐久性研究
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182712
A. Vijayabhaskar, M. Shanmugasundaram
{"title":"Enhancing the Durability Properties of Concrete prepared with Multiwalled Carbon Nanotubes","authors":"A. Vijayabhaskar, M. Shanmugasundaram","doi":"10.56748/ejse.182712","DOIUrl":"https://doi.org/10.56748/ejse.182712","url":null,"abstract":"This paper describes the study of durability aspects of concrete incorporated with different dosages of (0 % - 0.40 %) of Multiwalled Carbon Nanotubes (MWCNTs). Each specimen was subjected to Acid attack test, Chloride attack test, Sulphate attack test and water permeability test for a duration of 28, 56 and 90 days respectively. It has been observed from the experiments that the specimen of 0.25% Multiwalled Carbon Nanotubes shows an extraordinary performance among the other specimens. It was also observed that this mix performed much better than the control specimen.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70726298","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: 2
Experimental Investigation of Exterior Mechanbical Precast Beam Column Connections using Internal Dissipators under Seismic Loading 地震荷载作用下采用内消能器的外部机械预制梁柱连接试验研究
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182642
K. Thulasirajan, Revathi
{"title":"Experimental Investigation of Exterior Mechanbical Precast Beam Column Connections using Internal Dissipators under Seismic Loading","authors":"K. Thulasirajan, Revathi","doi":"10.56748/ejse.182642","DOIUrl":"https://doi.org/10.56748/ejse.182642","url":null,"abstract":"This paper investigates the development and testing of the proposed one-third scaled precast beam column specimens using cleat angle and unbonded threaded rod connection (internal dissipator) under reverse cyclic loading. One monolithic specimen for reference and two precast specimens were studied. The parameters considered in the precast specimens were the presence of stiffener and the action of cement grouting in the predetermined gap of the beam column interface region. The load and displacement were measured for the cyclic loading and thereby strength, hysteretic behaviour, energy dissipation, stiffness, ductility and stiffness degradation were computed and compared. The experimental results showed that the performance of monolithic specimen was superior to precast specimens. The performance of precast specimen with cleat angle and stiffener was found to be superior to precast specimen without stiffener.","PeriodicalId":52513,"journal":{"name":"Electronic Journal of Structural Engineering","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49240317","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
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