板柱-剪力墙结构中剪力墙合理数量的研究
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摘要
板柱-剪力墙结构是一种新型的建筑形式,日益受到世界各国的广泛关注.而我国对此结构的研究还很少,尤其是在地震区使用该结构时,由于没有一个明确的最优化方法,工程师出于对结构安全性能的考虑会把剪力墙的数量设计的过多,没有充分利用剪力墙的承载能力,造成了一定的浪费.而且,目前针对该结构的研究并不成熟,经验较少,规范中也未明确给出其经济性指标.因此,进行结构设计时,在满足建筑使用功能的前提下,同时综合考虑结构的经济性和剪力墙的抗侧移能力,对板柱-剪力墙结构中的剪力墙的合理数量进行研究分析显得尤为必要.本文对建筑高度54m(层数为15层)的板柱-剪力墙结构在8度(0.2g)抗震设防烈度下,选用6种布墙率,分别对结构的抗震性能进行反应谱分析、弹性动力时程分析和静力弹塑性(PUSHOVER)分析.根据结构的周期比、剪重比、基底剪力、层间位移角以及塑性铰出铰情况,确定最接近规范限值的剪力墙布墙率.分析结果表明:在板柱-剪力墙结构中的剪力墙最佳布墙率为3%,此时的塑性阶段层间位移角为1/222.
Slab-column shear wall structure is a new architectural form,which is attracting more and more attention from all over the world.However,there is little research on this structure in China,especially when it is used in earthquake zones.Because there is no clear optimization method,engineers will design too many shear walls out of consideration of structural safety performance,and fail to make full use of the bearing capacity of shear walls,resulting in a certain waste.Moreover,the current research on this structure is not mature and has little experience,and its economic index is not clearly specified in the specification.Therefore,it is particularly necessary to study and analyze the reasonable number of shear walls in slab-column-shear wall structure on the premise of satisfying the use function of the building and taking into account the economy of the structure and the resistance of shear walls.For the slab-column-shear wall structure with a height of 54 m(15 stories),6 kinds of wall-laying rates were selected under the 8 degree(0.2 g)seismic fortification intensity in this paper.The seismic response of the structure was analyzed by response spectrum analysis,elastic time-history dynamic analysis and Pushover analysis.The walllaying rate of shear wall that is closest to the limits of standard was determined according to the structure of the period ratio,shear-weight ratio,base shear,interlayer displacement angle and plastic hinges.Analysis results show that the optimum wall-laying rate of the shear wall in the slab-column-shear wall is 3.0% and the interlayer displacement angle at the plastic stage is 1/222.
Slab-column shear wall structure is a new architectural form,which is attracting more and more attention from all over the world.However,there is little research on this structure in China,especially when it is used in earthquake zones.Because there is no clear optimization method,engineers will design too many shear walls out of consideration of structural safety performance,and fail to make full use of the bearing capacity of shear walls,resulting in a certain waste.Moreover,the current research on this structure is not mature and has little experience,and its economic index is not clearly specified in the specification.Therefore,it is particularly necessary to study and analyze the reasonable number of shear walls in slab-column-shear wall structure on the premise of satisfying the use function of the building and taking into account the economy of the structure and the resistance of shear walls.For the slab-column-shear wall structure with a height of 54 m(15 stories),6 kinds of wall-laying rates were selected under the 8 degree(0.2 g)seismic fortification intensity in this paper.The seismic response of the structure was analyzed by response spectrum analysis,elastic time-history dynamic analysis and Pushover analysis.The walllaying rate of shear wall that is closest to the limits of standard was determined according to the structure of the period ratio,shear-weight ratio,base shear,interlayer displacement angle and plastic hinges.Analysis results show that the optimum wall-laying rate of the shear wall in the slab-column-shear wall is 3.0% and the interlayer displacement angle at the plastic stage is 1/222.
引文
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[9]魏琏,王森.论高层建筑结构层间位移角限值的控制[J].建筑结构,2006,36:49-55.WEI L,WANG S.Discussion on inter-story displacement angle of high-rise building[J].Building Structure,2006,36:49-55.
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[11]SHY J H,JACK P M.Models for laterally loaded slab-column frames[J].ACI Structure Journal,2000,97(2):345-352.
[2]郭楠,郭轶宏,赵婷婷.板柱-剪力墙结构抗震性能分析[J].沈阳建筑大学学报,2010,26(6):1058-1065.GUO N,GUO Y H,ZHAO T T.Seismic performance analysis of plate column shear wall structure[J].Journal of Shenyang Construction University,2010,26(6):1058-1065.
[3]GB50010-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50010-2010Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.
[4]吴灿阳.板柱-剪力墙结构抗震性能研究[D].长沙:湖南大学,2013.WU C Y.Study on seismic performance of plate column shear wall structure[D].Changsha:Hunan University,2013.
[5]郭楠,朱金.剪力墙布置对板柱-剪力墙结构扭转效应的影响[J].江苏科技大学学报,2013,27(3):224-228.GUO N,ZHU J.Influence of shear wall layout on torsional effect of plate column shear wall structure[J].Journal of Jiangsu University of Science and Technology,2013,27(3):224-228.
[6]彭宇怀.板柱结构性能比较分析研究[D].长沙:湖南大学,2013.PENG H Y.Comparison and analysis of the performance of plate and column[D].Changsha:Hunan University,2013.
[7]JGJ3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2011.JGJ3-2010Technical specification for concrete structure of high rise buildings[S].Beijing:China Architecture&Building Press,2011.
[8]陈康华,郭远翔.弹性动力时程分析中地震波的选取方法研究[J].河北工业科技,2012,29(1):40-43.CHEN K H,GUO Y X.Study on seismic wave selection in elastic dynamic time history analysis[J].Hebei Industrial Technology,2012,29(1):40-43.
[9]魏琏,王森.论高层建筑结构层间位移角限值的控制[J].建筑结构,2006,36:49-55.WEI L,WANG S.Discussion on inter-story displacement angle of high-rise building[J].Building Structure,2006,36:49-55.
[10]KILAR V,FAJFAR P.Simple push-over analysis of asymmetric buildings[J].Journal of Earthquake Engineering and Structrual Dynamic,1997,6(11):233-249.
[11]SHY J H,JACK P M.Models for laterally loaded slab-column frames[J].ACI Structure Journal,2000,97(2):345-352.
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