带腋撑的梁式转换结构抗震性能分析  

Analysis of seismic performance of transfer structure with haunch braces

作　　者：刘孟[1] 王泽军[1,2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学建筑设计研究院,陕西西安710055

出　　处：《世界地震工程》2016年第2期255-258,共4页World Earthquake Engineering

摘　　要：由于钢筋混凝土梁式转换结构具有截面尺寸大,竖向刚度突变严重等不利于抗震的弊端,因此介绍一种新型带腋撑的梁式转换结构,通过降低其竖向刚度的突变,提高结构抗震性能。运用Sap2000有限元模拟软件建立不带腋撑和分别在X向、Y向以及双向带腋撑的梁式转换结构有限元模型,通过对比分析4种不同工况下结构的抗震性能,得出带腋撑的梁式转换结构其抗震性能有明显的提高。由此可见腋撑的设置可以大大降低转换梁弯矩和端部剪力,并且均衡竖向刚度的突变。Due to the large cross section size of reinforced concrete beam-type transfer structure, the mutation of vertical stiffness are against seismic faults, this paper will introduce a transfer structure with haunch braces, in or- der to reduce the vertical stiffness of mutations, improve its seismic performance. By using SAP2000,it established without haunch braces and respectively in the X, Y and two - way with it held finite element model of beam - type transfer structure, the seismic performance were analyzed. So it can be seen that the seismic performance of transfer structure with haunch braces was improved greatly, haunch braces supports setting can reduce the shear force, the moment at the end of the beam and balance vertical stiffness changes.

关 键 词：腋撑 框架结构 梁式转换结构 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]