石材幕墙背栓缺失的模态特性试验分析  

EXPERIMENTAL ANALYSIS OF MODAL CHARACTERISTICS OF MISSING BACK BOLT OF STONE CURTAIN WALL

作　　者：张微 夏冯慧 吴映栋 陈常青 张大伟[2] ZHANG Wei;XIA Fenghui;WU Yingdong;CHEN Changqing;ZHANG Dawei(Zhejiang Greenton Architectural Design Co.,Ltd.,Hangzhou 310007,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310012,China)

机构地区：[1]浙江绿城建筑设计有限公司,杭州310007 [2]浙江大学建筑工程学院,杭州310012

出　　处：《低温建筑技术》2025年第3期80-84,共5页Low Temperature Architecture Technology

基　　金：浙江绿城建筑设计有限公司科研项目(513201-I52401/001)。

摘　　要：为提升背栓式石材幕墙的无损检测技术,文中研究对缺失背栓的石材幕墙进行振动模态测试。利用模态振型置信度(MAC值)和原点频响函数这两个结构损伤指标,对背栓的缺失位置和数量进行识别与评估。研究结果表明,在背栓缺失的情况下,石材面板的振型与背栓完整时的模态振型置信度(MAC值)相比会有所下降。在背栓缺损的场合,缺陷位置的原点频响函数会展示出显著的低阶固有频率特征。研究为无损检测技术在识别石材模卡给背栓完整性方面提供一种有效的分析手段。To enhance the non-destructive testing technology for back-bolt stone curtain walls,this study conducts vibration modal tests on stone curtain walls with missing back bolts.Two structural damage indicators,the modal assurance criterion(MAC value)and the point frequency response function,are used to identify and assess the location and number of missing back bolts.The results indicate that in the absence of back bolts,the mode shapes of the stone panel exhibit a decrease in MAC values compared to those of a fully bolted structure.In cases of back-bolt defects,the point frequency response function at the defect location reveals significant low-order natural frequency characteristics.This study may provide an effective analytical method for applying non-destructive testing technology to assess the integrity of back bolts in stone curtain walls.

关 键 词：石材幕墙 模态振型 背栓缺失 无损检测 

分 类 号：TU767[建筑科学—建筑技术科学]