International Journal of Civil and Structural Engineering最新文献_第3页

Reinforced granular column for deep soil stabilization: A review 加固颗粒柱用于深层土体稳定:综述

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030002

Y. Tandel, C. Solanki, A. Desai

{"title":"Reinforced granular column for deep soil stabilization: A review","authors":"Y. Tandel, C. Solanki, A. Desai","doi":"10.6088/IJCSER.00202030002","DOIUrl":"https://doi.org/10.6088/IJCSER.00202030002","url":null,"abstract":"The engineering structures constructed on thick deposits of soft soil strata have problems of low bearing capacity, excessive total and differential settlement, lateral spreading etc. To mitigate such problems, different ground improvement techniques are available namely; vertical drains, lime/cement column, stone (granular) column etc. in view of their proven performance, short time schedule, durability, constructability and low costs. Stone column technique seems to be very suitable and favourable ground improvement technique for deep soft soil improvement. Further to prevent excessive bulging, squeezing of stone into soft soil, stone column can be encased with suitable geosynthetic. Another advantage of encasement is having high load carrying capacity and lesser settlement of composite foundation. This paper presents the current state of the geosynthetic encased stone column as a ground improvement technique. A review is provided aiming to: (a) identify key considerations for the general use of encased stone columns, (b) provide insights for design and construction, (c) compile the latest research developments. Case histories of field applications and observed field performance are cited to portray different stone column applications and observed effectiveness. The paper identifies areas where more research is needed and includes recommendations for future research and development.","PeriodicalId":162063,"journal":{"name":"International Journal of Civil and Structural Engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117166085","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: 18

Probabilistic Seismic Demand Models of PEER-PBEE framework for Pile and Deck Structures 桩与甲板结构PEER-PBEE框架的概率地震需求模型

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030007

R. Amirabadi, K. Bargi, H. H. Torkamani

{"title":"Probabilistic Seismic Demand Models of PEER-PBEE framework for Pile and Deck Structures","authors":"R. Amirabadi, K. Bargi, H. H. Torkamani","doi":"10.6088/IJCSER.00202030007","DOIUrl":"https://doi.org/10.6088/IJCSER.00202030007","url":null,"abstract":"Probabilistic seismic demand model (PSDM) is one component of the second-generation performance based earthquake engineering (PBEE-2) framework developed by Pacific Earthquake Engineering Research (PEER) center. A representative relation between intensity measures (IMs) and engineering demand parameters (EDPs) forms the basis of the PSDM. This study aims to develop an optimal PSDM for typical pile-supported wharf structures using 2D numerical model of 5 centrifuge models tested at UC Davis campus and performing probabilistic seismic demand analysis (PSDA) under a pool of ground motion records. In PSDA the relation between certain EDPs and specific IMs is formulated by statistic nonlinear time-history analysis. For these structures, the optimal PSDM derived thorugh several IM_EDP pairs, should be practical, sufficient, effective and efficient. According to these criteria, in resulted IM-EDP pairs, Sa determined as the optimal IM and moment curvature ductility factor (μΦ), horizontal displacement of embankment and differential settlement between deck and behind land are considered for optimal local, intermediate and global EDP quantities, respectively. The Sa-displacement ductility factor (μd) determined as the best optimal IM-EDP pair. The results are useful to owners and designers for assessment seismic performance of pile-supported wharf structures.","PeriodicalId":162063,"journal":{"name":"International Journal of Civil and Structural Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132841983","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

Study on the physical and mechanical property of ordinary portland cement and fly ash paste 普通硅酸盐水泥与粉煤灰膏体的物理力学性能研究

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030003

S. Mukherjee, S. Mandal, U. B. Adhikari

引用次数: 25

Influence of host structure characteristics on response of rooftop telecommunication towers 主机结构特性对屋顶电信塔响应的影响

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030004

Nitin Bhoslae

{"title":"Influence of host structure characteristics on response of rooftop telecommunication towers","authors":"Nitin Bhoslae","doi":"10.6088/IJCSER.00202030004","DOIUrl":"https://doi.org/10.6088/IJCSER.00202030004","url":null,"abstract":"The increasing trend of mobile communications has seen exponential growth in the last three years. Increased competitions among mobile operators also have contributed to the installation of many towers to enhance both coverage area and network reliability. The tower locations as specified in terms of latitudes and longitudes with the height of mounted antenna dictated by functional requirements of the network. The availability of land which satisfies ideal installation conditions in urban areas is extremely limited giving no alternative but to adopt roof top towers (with marginal adjustment in position but not in height). In the present study, the seismic response of 4-leged telecommunication tower has been studied under the effect of design spectrum from the Indian seismic code of practice for Zone-IV. The analysis has been performed on ground tower and tower located on the roof of host structure by varying positions of tower with increasing the stiffness of host structure in the both direction (X and Y). Their dynamic analyses are performed by SAP2000 program. The axial forces of the tower members are considered as the main parameter. The comparison has been made between rooftop tower and ground tower members at the same height from the ground.","PeriodicalId":162063,"journal":{"name":"International Journal of Civil and Structural Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130023897","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: 14

Analysis of tall building for across wind response 高层建筑横向风响应分析

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030024

A. Y. Vyavahare, P. N. Godbole, T. Nikose

{"title":"Analysis of tall building for across wind response","authors":"A. Y. Vyavahare, P. N. Godbole, T. Nikose","doi":"10.6088/IJCSER.00202030024","DOIUrl":"https://doi.org/10.6088/IJCSER.00202030024","url":null,"abstract":"Tall buildings are slender flexible structures and need to be investigated to ascertain the importance of wind induced oscillations or excitation along and across the direction of wind. The Indian code of practice for wind load on buildings and structures (IS-875 Part-3 1987) gives a procedure to determine along wind response of tall structures, while the across wind response and interference effect are not included in the code at present. A document ‘Review of Indian Wind Code IS 875 (Part 3) 1987’ has been prepared by IIT Kanpur under GSDMA project gives recommendations to obtain across wind response of tall buildings as per procedure given in Australian/New Zealand standard ‘Structural Design Actions – Part 2 Wind Action (AS/NZS 1170-2: 2002) In the Australian code to obtain the cross wind response it is necessary to compute the coefficient (Cfs) for which figures and expressions are given for selected (h:b:d) ratios. In this paper use of Artificial Neural Network (ANN) has been made to generalize the above procedure from the limited available data, so that across wind response can be obtained for a building with given (h:b:d) ratio.","PeriodicalId":162063,"journal":{"name":"International Journal of Civil and Structural Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130085422","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: 12

A review on ultra high performance 'ductile' concrete (UHPdC) technology 超高性能延性混凝土(UHPdC)技术综述

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030026

B. Nematollahi, M. Saifulnaz, S. Jaafar, Y. Voo

引用次数: 44

Efficiency and performances of finite difference schemes in the solution of saint Venant's equation 有限差分格式在saint Venant方程解中的效率和性能

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030022

H. Kalita, A. K. Sarma

{"title":"Efficiency and performances of finite difference schemes in the solution of saint Venant's equation","authors":"H. Kalita, A. K. Sarma","doi":"10.6088/IJCSER.00202030022","DOIUrl":"https://doi.org/10.6088/IJCSER.00202030022","url":null,"abstract":"The computation of unsteady free-surface flows is required to estimate the arrival time and height of a flood waves at any downstream location in a river flow. The governing equations solved in this regards are the St. Venant equations. These equations are highly non-linear partial deferential equation and closed form solutions are not available except in very simplified one dimensional case. The computer revolution in twentieth century made a new era where numeric methods can be utilized effectively to solve nonlinear partial differential equations. Though several numerical schemes have been developed by various investigators for solving these equations, the choosing of efficient scheme regarding its efficiency, accuracy and computational effort has always been remaining as an important topic from very beginning. In this paper mainly results of two different schemes, Lax diffusive scheme and Beam and warming scheme are presented. Validations of the models were achieved by comparing their results with results of MIKE21C modeling tool. The results in terms of surface profiles at different times and velocity vectors for both the schemes when plotted, it was observed that both the schemes lead to same results. But in case of the Beam and Warming scheme, it was observed that it takes a very large computational time for simulation.","PeriodicalId":162063,"journal":{"name":"International Journal of Civil and Structural Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128382972","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: 6

Effect of aggregate type on Compressive strength of concrete 骨料类型对混凝土抗压强度的影响

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030008

M. Abdullahi

{"title":"Effect of aggregate type on Compressive strength of concrete","authors":"M. Abdullahi","doi":"10.6088/IJCSER.00202030008","DOIUrl":"https://doi.org/10.6088/IJCSER.00202030008","url":null,"abstract":"The utilisation of three types of aggregate for concrete work is investigated in this paper. Normal concrete is being produced from different types of aggregate and this imparts different property to the resulting concrete. The most important property of concrete is its compressive strength. For the purpose of this work, three types of coarse aggregates, quartzite, granite, and river gravel, were used. The fine aggregate is normal sand obtained from a borrow pit. Preliminary laboratory investigation was conducted to ascertain the suitability of using the aggregates for construction work. Tests conducted include sieve analysis, bulk density, and specific gravity. Nominal mix (1:2:4) was adopted for this work and mix compositions were calculated by absolute volume method. For each type of coarse aggregate 75 cubes (150x150mm) were cast to allow the compressive strength to be monitored at 3, 7, 14, 21, and 28 days. Test result show that concrete made from river gravel has the highest workability followed by crushed quartzite and crushed granite aggregates. Highest compressive strength at all ages was noted with concrete made from quartzite aggregate followed by river gravel and then granite aggregate. Compressive strength models were proposed as a function of age at curing. Where concrete practitioners have options, aggregate made from quartzite is advisable to be used for concrete work.","PeriodicalId":162063,"journal":{"name":"International Journal of Civil and Structural Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124319318","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: 107

Comparison of design results of a Structure designed using STAAD and ETABS Software 用STAAD和ETABS软件设计某结构的设计结果比较

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030014

A. Herbert

引用次数: 15

Assessment of reinforced embankment on soft soil with PET and PP Geotextile PET和PP土工布加筋软土地基路堤评价

International Journal of Civil and Structural Engineering Pub Date : 2012-02-23 DOI: 10.6088/IJCSER.00202030011

J. Vashi, A. Desai, C. Solanki

引用次数: 5