平面大尺度钢筋混凝土框架柱弹性内力的二维地震行波效应  

2D seismic traveling wave effect on elastic inner force of large-scale concrete frame column

作　　者：伍松[1] 张新培[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065

出　　处：《世界地震工程》2013年第3期152-160,共9页World Earthquake Engineering

摘　　要：针对平面大尺度砼框架地震行波效应研究缺乏的现状,借助建筑结构通用有限元软件Midas/Gen,采用时程分析方法,对受二维水平地震作用的平面大尺度混凝土框架柱弹性内力进行了地震行波效应研究。采用非一致激励与一致激励下平面大尺度砼框架柱内力的比值β来描述地震行波效应影响。详细分析了结构平面尺度、地震波速等因素对β的影响规律。给出了地震行波效应影响显著的结构平面区域以及其β值随结构平面面积与波速平方之比值x变化关系的回归方程。根据这些回归方程,可确定应考虑地震行波效应的结构平面尺度、地震波速以及相应β值。In view of the fact that the research on inner force of planar large-scale concrete frames under seismic traveling wave is absent, in this paper, we made use of the general building structure finite element software Midas/ Gen, apply time-history analysis method to study the elastic inner force of the planar large-scale concrete frames un- der the two dimensional horizontal seismic traveling wave. Using the ratio fl of the column inner force under incon- sistent excitation over that under consistent excitation to describe the effect of traveling wave on columns of planar large-scale concrete frames, we analyzed the effect of seismic wave input angle, structural plane scale and seismic wave velocity etc. on the value of fl in detail We get the seismic input angle and structure planar region with remark- able traveling wave effect , and the regression equation between the value of fl and the ratio x of structural planar are over square of velocity. According to the regression equation, we can determine the structure plane scale, earth- quake wave velocity and the corresponding fl value considering seismic traveling wave effect.

关 键 词：大尺度钢筋混凝土框架 框架柱内力 二维水平地震输入 行波效应 

分 类 号：TU375.3[建筑科学—结构工程]