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Column Analogy in Multi-Span Hinged Frames 多跨铰接框架中的柱模拟
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182732
A. Badir, M. Badir
{"title":"Column Analogy in Multi-Span Hinged Frames","authors":"A. Badir, M. Badir","doi":"10.56748/ejse.182732","DOIUrl":"https://doi.org/10.56748/ejse.182732","url":null,"abstract":"A procedure is presented in which the method of column analogy, normally applicable to the analysis of single-span and closed frames, is extended for the analysis of multi-span frames with columns hinged to the ground. The extension involves consideration of conditions of rotations at the hinges. For illustration, a two-span hinged frame issolved in details. Results are in excellent agreement with values obtained using classical structural methods.","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":"49564212","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
Effects of Subsoil Characteristics on the Earthquake Loading of Steel Lattice Telecommunication Towers in the South Asia 地基特性对南亚钢格构通信塔地震荷载的影响
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182752
A.M.L.N Gunathilaka, C.S. Lewangamage, M.T.R. Jayasinghe
{"title":"Effects of Subsoil Characteristics on the Earthquake Loading of Steel Lattice Telecommunication Towers in the South Asia","authors":"A.M.L.N Gunathilaka, C.S. Lewangamage, M.T.R. Jayasinghe","doi":"10.56748/ejse.182752","DOIUrl":"https://doi.org/10.56748/ejse.182752","url":null,"abstract":"Self-supporting lattice towers, which are having quite a few unique structural features, play a vital role in communication networks. Ensuring structural stability of these giant structures under all possible natural and human threats are vital as failures of such structures may cause a catastrophic human & property damages. Further, possible communication outages caused by failure of tower/towers in disaster situation are a critical as it may hamper rescue and other emergency operations. This was experienced by South and South East Asian countries during 2004 Tsunami. Hence, need of mitigating these situations have been highlighted by various reports. Therefore, ensuring structural integrity of self-supporting lattice towers under seismic forces is an essential and timely need. This paper discusses a seismic performance of four leg and three leg lattice towers under Response Spectrum analysis under different sub soil conditions. Results of seismic analyseshas also been compared with wind analyses results.","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":"44005120","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
Prospects of using Prefabricated Ferrocement Jacket for Semi-Automated Strengthening of RC Column 预制铁护套在钢筋混凝土柱半自动化加固中的应用前景
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182632
A. Kaish, Lutfun Nahar, A. Jaafar, Yagoub Ahmed
{"title":"Prospects of using Prefabricated Ferrocement Jacket for Semi-Automated Strengthening of RC Column","authors":"A. Kaish, Lutfun Nahar, A. Jaafar, Yagoub Ahmed","doi":"10.56748/ejse.182632","DOIUrl":"https://doi.org/10.56748/ejse.182632","url":null,"abstract":"Ferrocement jacketing is an effective strengthening tool for RC column. The installation of ferrocement jacket is very easy; it does not require highly skilled labor to install. However, its’ installation is time consuming over the commonly used technique, like fiber reinforced polymer (FRP) jacketing. It also requires 4 weeks curing to achieve strong and dry surface. Therefore, although ferrocement jacketing is a very effective strengthening option for RC column, its’ use is not generally recommended for the existing structures. To overcome this limitation, this study presents a unique idea of pre-fabricated ferrocement jacketing system forstrengthening of RC column. It is hypothesized that pre-fabricated ferrocement jacketing system will ensure a semi-automated strengthening system where the jacket will be prepared in controlled environment (i. e. in prefabrication factory) with automated technology and then it will be installed in-place using nut-bolted connections. With the help of this semi-automated strengthening system, it will be possible to expedite strengthening activity of existing RC structures. It will also reduce the labor cost as the ferrocement jackets will be prefabricated in factory with the aid of automated construction system. Experimental results also show that theprefabricated ferrocement jacket is effective to strengthen concrete column.","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":"44342116","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
Dynamic analysis on a buried horizontal double-layer SF-type liquidstorage tank by finite element method 埋地双层SF型卧式卧式储罐的有限元动力分析
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182742
X. Cheng, L Hu, W. Zhang, D. Yu
{"title":"Dynamic analysis on a buried horizontal double-layer SF-type liquidstorage tank by finite element method","authors":"X. Cheng, L Hu, W. Zhang, D. Yu","doi":"10.56748/ejse.182742","DOIUrl":"https://doi.org/10.56748/ejse.182742","url":null,"abstract":"To study the dynamic responses of a buried horizontal double-layer SF-type liquid-storage tank considering liquid-solid interaction, a three-dimensional finite element model of the double-layer buried horizontal liquid-storage tank is established, and the model is calculated and simulated by using FEM (finite element method). The results show that the double-layer buried horizontal SF-type liquid-storage tank is a composite multi-layer structure; thus, the dynamic responses of the inner layer, interlayer and outer layer are different under the same earthquake wave: the tank wall displacement of the interlayer is the maximum, whereas that of the outer layer is the minimum; the tank wall equivalent stress of the inner layer is the maximum, whereas that of the outer layer is the minimum; and the distributions of strain and velocity in the inner and outer layers are also different. The double-layer SF-type oil-storage tank has different dynamic response rules under the actions of the El-Centro wave and the Lanzhou wave. Compared with the El-Centro wave, the dynamic responses of the double-layer oil-storage tank are more significant under the action of the Lanzhou wave. The dynamic responses of the horizontal double SF tank are found to be closely related to the spectral characteristics of the seismic wave and exhibit different dynamic responses under different earthquakes.","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":"41402013","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
Effects of Elevated Temperature Curing on Glass Transition Temperature of Steel/CFRP Joint and Pure Epoxy Adhesive 高温固化对钢/CFRP接合及纯环氧胶粘剂玻璃化转变温度的影响
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182582
E. Chandrathilaka, J. Gamage, S. Fawzia
{"title":"Effects of Elevated Temperature Curing on Glass Transition Temperature of Steel/CFRP Joint and Pure Epoxy Adhesive","authors":"E. Chandrathilaka, J. Gamage, S. Fawzia","doi":"10.56748/ejse.182582","DOIUrl":"https://doi.org/10.56748/ejse.182582","url":null,"abstract":"Glass transition temperature (Tg) of the steel/epoxy/CFRP composite bond can affect the service and fire performance of the system. Two test series were conducted to evaluate the Tg of the pure epoxy adhesive and the steel/epoxy/CFRP bond. A total of twenty-six double strap joints and pure epoxy adhesive samples were prepared under different curing conditions to check the Tg of bond. Six different curing conditions were used. The test results revealed that the elevated temperature curing has a significant affect on the Tg of steel/epoxy/CFRP bond and pure epoxy adhesive. A considerable improvement of Tg was noted in the joint with elevated temperature curing when compare with the epoxy adhesive samples cured under the samecondition. The strength degradation of the bond for a certain temperature exposure is also reduced with increased Tg of the joint.","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":"45327489","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
Soil-Structure Interaction of Tall Buildings Comprising Shear Walls with Openings Under Seismic Loads 地震荷载作用下带开口剪力墙高层建筑的土-结构相互作用
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182662
T. Sharaf, M. El Gendy, S. Badr, E. Lotfy
{"title":"Soil-Structure Interaction of Tall Buildings Comprising Shear Walls with Openings Under Seismic Loads","authors":"T. Sharaf, M. El Gendy, S. Badr, E. Lotfy","doi":"10.56748/ejse.182662","DOIUrl":"https://doi.org/10.56748/ejse.182662","url":null,"abstract":"As a result of population density in Egypt emerged the importance of the use of tall buildings. Tall buildings increase the displacement of top floors due to lateral loads effect and increase the settlement due to vertical loads. A numerical analysis is carried out to analyse buildings with shear walls that have regular and staggered openings and resting on piles raft with different pile configurations under seismic action. The behaviour of soil-structure interaction, with weak soil profile, on superstructure of 20, 25, and 30 storeys and rested on a pile raft was investigated and was found to have a significant effect on the buildings. It was found that the openings in the shear walls have a significant effect on the values of the settlement. Also, the staggered openings are preferable more than the regular openings and the effect of pile length in clay soil is greater than the pile diameter.","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":"45890595","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
Active State Earth Pressure based on Dubrova’s Method of Redistribution of Pressure 基于Dubrova压力重分布法的主动状态土压力
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182672
S.C. Wang, F Xu, Y. Shao
{"title":"Active State Earth Pressure based on Dubrova’s Method of Redistribution of Pressure","authors":"S.C. Wang, F Xu, Y. Shao","doi":"10.56748/ejse.182672","DOIUrl":"https://doi.org/10.56748/ejse.182672","url":null,"abstract":"Modes and magnitude of wall movement have great influence on the distribution of earth pressure behind retaining wall. For gravity retaining wall exerted by cohesionless soil rotating outward about the base, based on Dubrova’s method of redistribution of pressure and forming mechanism of earth pressure, the distribution pattern of internal friction angle along the wall back was established for different displacements, and then, an improved method of calculating active earth pressure was proposed, which considers the influence of displacement. When the retaining wall is in an at-rest state, the distribution of earth pressure calculated in this paper is defined as initial active state earth pressure, and it is not equal to static earth pressure, because the retaining wall has a tendency of active displacement. As the wall movement develops, the mobilized internal friction angle of the quasi sliding surface increases gradually from the initial internal friction angle to the internal friction angle, and accordingly, the distribution of earth pressure at the intersection of the sliding surface and the wall back decrease gradually from the distribution of initial active state earth pressure in static state to that of Coulomb active earth pressure.","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":"41588870","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
Experimental and Numerical Investigation of an Eccentrically Loaded Strip Footing on Reinforced Sand Slope 加筋沙边坡偏心荷载条形基础试验与数值研究
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182592
A. Abdi, K. Abbeche, R. Boufarh, B. Mazouz
{"title":"Experimental and Numerical Investigation of an Eccentrically Loaded Strip Footing on Reinforced Sand Slope","authors":"A. Abdi, K. Abbeche, R. Boufarh, B. Mazouz","doi":"10.56748/ejse.182592","DOIUrl":"https://doi.org/10.56748/ejse.182592","url":null,"abstract":"An experimental program and numerical computations were performed to investigate the slope effect on the bearing capacity of an eccentrically loaded strip footing. Two cases were considered: unreinforced sand slope and reinforced slope by geogrid. Tests were conducted on scaled footing models under various eccentric loads. A parametric study was carried out to examine the effect of the slope on the bearing capacity and the depth of geogrid layers under different eccentric loads. It was shown that the location of the eccentricity of applied load with respect to the slope face has a significant effect on the bearing capacity. This latter increase when the distance from applied eccentric load to the slope face also increases. Obtained results also showed that the bearing capacity of strip footing also depends on the inclination of ground surface in comparison to that predicted from horizontal ground.","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":"42341778","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
A Review Applying Industrial Waste Materials in Stabilisation of Soft Soil 工业废料在软土稳定中的应用综述
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182602
Z. Al-khafaji, H. Al-Naely, A. E. Al-Najar
{"title":"A Review Applying Industrial Waste Materials in Stabilisation of Soft Soil","authors":"Z. Al-khafaji, H. Al-Naely, A. E. Al-Najar","doi":"10.56748/ejse.182602","DOIUrl":"https://doi.org/10.56748/ejse.182602","url":null,"abstract":"Waste materials one of the most risky issues that the environment could be faced. So, many procedures have been taken by both the governments and individuals separately or together in order to reduce the effect of this global issue. One of these procedures were done by reduce the creating of the industrial waste, the reducing of waste does not mean there no waste will produce. However, the best way reduce theimpact of industrial wastes by reusing them or employed in another application such as soft soil stabilisations. Thus, in this research paper will discuss the differences between the using of traditional stabilisers materials and the cement replacement materials on both the strength of soil and physical features.","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":"48715882","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: 25
Investigating Non-Linear Dynamic Behavior of Dual Steel Frames under the Effect of Near and Far Fields to Fault 双钢框架在近场和远场作用下的非线性动力特性研究
IF 0.6
Electronic Journal of Structural Engineering Pub Date : 2018-06-01 DOI: 10.56748/ejse.182762
H.R. Ashrafi, P. Beiranvand, H.R. Babaali, M. Gohari
{"title":"Investigating Non-Linear Dynamic Behavior of Dual Steel Frames under the Effect of Near and Far Fields to Fault","authors":"H.R. Ashrafi, P. Beiranvand, H.R. Babaali, M. Gohari","doi":"10.56748/ejse.182762","DOIUrl":"https://doi.org/10.56748/ejse.182762","url":null,"abstract":"This study sought to investigate steel frames’ performance with dual lateral loader system (Frame bending + bracings of divergent and convergent) in near and far filed to fault. In order to this, four categories of steel frame with dual system with 8, 10 and 12 story are designed with average formation based on existing seismic regulation in 2800 standard of Iran and tenth chapter of national regulations of construction (planning and performing steel construction). Time history non-linear dynamic analysis under the effect of near and far field earthquakes has been done on plan’s models. Then the maximum of floors’ dislocation, floors’ drift, roof dislocation, base shear and energy curves of frames are shown and compared with each other. All non-linear time history analyses have been accomplished using PERFORM 3D software.","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":"45500916","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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