摘要
为研究江南传统木构建筑围护结构对整体结构受力性能的影响,并为该类型建筑的抗震和抗风计算提供依据,以典型江南传统木构建筑——甘熙故居津逮楼为例,采用有限元分析和结构动力特性测试的方法对该类型传统木构建筑的结构模型修正方法进行研究.首先,采用SAP2000有限元软件分别建立了不考虑围护结构效应的一种模型和考虑围护结构效应的3种修正模型,并进行结构动力特性分析;然后,采用结构动力测试分析系统对建筑进行现场测试,并将测试结果与3种修正模型计算结果进行比较分析.结果表明:相比于不考虑围护结构效应,考虑围护结构效应后3种修正模型的前三阶自振频率明显提高,等效斜撑模型的提高幅度为220%~307%,等效斜撑+幕墙墙元模型的提高幅度为228%~345%,而整体简化模型的提高幅度为230%~295%,但第一阶振型和第二阶振型发生了明显改变.等效斜撑模型的计算结果最接近真实测试结果,误差在15%范围以内,是最优的修正模型.等效斜撑+幕墙墙元模型的计算结果与实测结果的误差基本在20%以内,是其次可接受的修正模型.而整体墙元模型的计算结果与实测结果严重不符.对该类型传统木构建筑进行振动响应分析、风振作用下的受力性能分析、多遇地震作用下的弹性受力性能分析时,建议采用等效斜撑模型进行计算.当对该类型木构建筑进行设防地震、罕遇地震作用下出现弹塑性变形时的结构分析,需考虑围护结构失效时,建议采用不考虑围护结构效应模型进行计算.
In order to study the effect of building envelope structures on the structural performance of traditional timber building in the Yangtze River region and to provide the calculation basis of the seismic performance and wind-resistant performance of this type of buildings, Jindai Building,a typical traditional timber building in the Yangtze River region,was taken as an example, and the model updating methods of this building were studied by the methods of finite element analysis and structural dynamical characteristic tests. First, by using finite element software SAP2000, the structural model without consideration of building envelope effects and the three structural models considering building envelope effects were established to analyze their dynamical characteristics. Then, the structural dynamical characteristic test was carried out on site. By comparing the results of the finite element methods and the dynamical characteristic test, some important results can be drawn as follows: in terms of natural vibration frequency, the results of these three updating models considering building envelope effects are obviously higher than that of the model without consideration of building envelope effects. The increment of the equivalent diagonal strut model is 220%~307%, the increment of the equivalent diagonal strut and shell element model is 228%~345%, and the increment of the integral simplified model is 230%~295%, but the first mode shape and second mode shape of this updating model are changed. The results of the equivalent diagonal strut model are very close to the results of the dynamical tests, and the error is smaller than 15%. Therefore, the equivalent diagonal strut model is the best updating model for this building. The results of the equivalent diagonal strut and shell element model are also close to the results of the dynamical tests, and the error is smaller than 20%. Thus, the equivalent diagonal strut and shell element model is the second-best updating model for this building. The results of the simplifi
作者
淳庆
华一唯
张承文
孟哲
CHUN Qing;HUA Yiwei;ZHANG Chengwen;MENG Zhe(School of Architecture,Southeast University,Nanjing 210096,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第5期54-63,共10页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51778122,51578127)~~
关键词
江南传统木构建筑
模型修正
结构动力特性
津逮楼
围护结构
traditional timber buildings in the Yangtze River region
model updating
structural dynamical characteristic
Jindai Building
building envelope
