建筑幕墙振动台试验地震作用再现方法  

Reproduction of Floor Motions of Shaking Table Test for Curtain Walls

作　　者：樊圆 任祥香 谷子 卢文胜[1,2] FAN Yuan;REN Xiangxiang;GU Zi;LU Wensheng(College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾减灾全国重点实验室,上海200092

出　　处：《实验室研究与探索》2025年第3期21-25,42,共6页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52308527)。

摘　　要：为了实现对建筑幕墙抗震性能的合理检验与评估,构建具有抗震韧性的建筑,在幕墙模拟地震振动台试验中,需要通过专门的分析合成设计,使地震激励不仅仅局限于简单的地面地震动输入,而是利用试验加载钢框架来模拟幕墙安装位置处主体结构的地震反应。提出了一种考虑加载框架放大效应的楼面地震激励设计方法,该方法充分考虑了全频率成分对楼面谱的贡献,并通过计算构造谱谱比来获取目标台面谱和修正地震激励。采用该方法进行复杂幕墙体系振动台试验表明,加载框架对台面地震动输入具有显著的有放大作用,结构周期处的谱值放大倍数在试验中可达到5.8倍。考虑加载框架动力特性的幕墙地震输入的波形方法能够大大提升加载框架楼面谱谱值与目标谱之间的吻合度,从而有利于实现楼面地震作用的准确再现。Rational evaluation on seismic performance of building curtain walls is an important part of the building earthquake resilience design.In the shaking table test of building curtain walls,the earthquake excitation is not simply same with the ground motion input,but the seismic response of the corresponding time history where the curtain walls is installed on the main structure,needs a special analysis and design.A shaking table input motion design method that takes into account the amplification effect of the supporting frame,fully considers the contribution of all frequency components to the floor spectrum is proposed.By calculating the spectral ratio,the target table spectrum and corrected seismic excitation are obtained.The shaking table test of a building faade system of an ultra-high performance concrete panel is carried out by using this method.The experimental research shows that the supporting frame of the building curtain walls can amplify the seismic inputs of the table,and the amplification factor in the test reach 5.8.An input design method of the curtain wall considering the dynamic characteristics of the supporting frame can greatly improve the consistency between the floor spectrum acceleration of the supporting frame and the target spectrum,which is conducive to the accurate reproduction of floor motions.

关 键 词：振动台试验 建筑幕墙 楼面谱 地震动输入 加载框架 

分 类 号：TU317[建筑科学—结构工程] TU352.1