高层异形柱框架—剪力墙结构构件截面延性及抗震性能分析.docx

西南交通大学硕士研究生学位论文 第1页
摘 要
本文利用Section Builder软件对L形、T形和十字形柱的截面进行了非线性分析。研究了肢宽厚比、轴压比、荷载角和箍筋间距等因素对异形柱截面曲率延性比的影响,以及在不同轴压比和不同方向荷载作用下,异形柱的屈服承载力和极限承载力。通过对比,找到最合理的荷载角度和使构件性能最优的条件组合。
使用有限元分析软件SAP2000对一13层异形柱框架一剪力墙结构的两种剪力墙布置方案进行抗震性能分析(模态分析、反应谱分析、线性时程分析),本文选取了三条地震波以及反应谱进行计算,经过对比两模型在地震波作用下的楼层位移和最大层间位移角,确定剪力墙的最佳布置方案。
确定剪力墙最优布置位置后,继续研究剪力墙的适宜高度。截断结构顶层剪力墙,其结构抗震性能与剪力墙沿全高设置相比比较接近,而且有更小的楼层位移和层间位移,此时,结构刚度没有产生突变,受力更为合理,因此剪力墙没有必要延伸到整个框架一剪力墙结构高度,可根据具体情况进行删减。
关键词:异形柱;曲率延性比;异形柱框架一剪力墙结构;抗震性能; 剪力墙最优布置;剪力墙适宜高度
西南交通大学硕士研究生学位论文 第ll页
ABSTRACT
In this paper,the nonlinear analysis of special-shaped columns as L shape. T shape and十shape is conculated by Section is acquired which about the curvature ration,yield bearing capacity,terminal bearing capacity for special·shaped columns,wim taking account of pression ratio,load space and the long breadth reaSonable pression,load angle and the ratio of stirrup of special-shaped columns are gained from the contrastive analysis.
TIlis paper’S researches are carried out based on a special-shaped ·shear wall structure、航th 13 high-rise building’S analysis on seismic response(Modal analysis,The elastic analysis under frequently earthquake)aided by FEA author selected three earthquake waves and a response spectrum to displacements of the floors,the displacement angles ofthe adjacent floors have pared, find the rational arrangement of shear walls.
After find the rational arrangement of shear walls,make a research about
eligible highness of shear the shear walls of top floor,the displacement ofthe floors and the displacemem angles ofthe adjacent floors is smaller than original ’S lateral stiffness iS not is concluded that not ail walI structures need to extend也eir shear walls to the height of entire structure by analyzing the eligible llie)mess of shear walls.
Keywords:special—shaped column;curvature duetility rat