考虑柱体摇摆效应的殿堂式木结构古建筑非线性地震反应分析  

NONLINEAR SEISMIC RESPONSE ANALYSIS OF PALACE-STYLE ANCIENT TIMBER BUILDING CONSIDERING COLUMN ROCKING

作　　者：崔兰浩 胡卫兵[1,2] 张锡成 邱智豪[1] CUI Lan-hao;HU Wei-bing;ZHANG Xi-cheng;QIU Zhi-hao(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi’an,Shaanxi 710055,China)

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]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《工程力学》2024年第6期77-86,104,共11页Engineering Mechanics

基　　金：国家自然科学基金项目(52278315);陕西省自然科学基础研究基金项目(2022JM-223)。

摘　　要：为了准确描述半刚性榫卯连接柱架在地震作用下的动力性能,采用非线性转动弹簧以模拟柱体在地震作用下的摇摆行为,基于柱体、榫卯节点及斗栱的非线性恢复力模型,提出了单层殿堂式木结构地震分析的集中质量简化分析模型,进行了地震作用下的结构动力响应时程分析。通过计算时程曲线与振动台试验结果的对比分析发现,未考虑柱体摇摆的计算值与试验值的误差较大,考虑摇摆效应的整体结构时程曲线计算峰值与柱架的实际位移峰值误差相对较小,且峰值出现的时间基本相同。基于简化模型进一步进行了参数分析,结果表明:竖向荷载可以显著降低殿堂式木结构的地震位移响应;柱高越大,结构的地震位移响应越大;结构的地震位移响应随着榫卯节点转动刚度的增大而显著降低;斗栱数量的增加提高了整体结构的抗侧刚度,从而降低了结构的地震位移响应。研究结果可为木结构古建筑在地震作用下的性能评估提供计算依据。In order to accurately describe the dynamic performance of the semi-rigid frame connected by mortise-tenon joints under seismic excitation,a nonlinear rotational spring is used to simulate the rocking behavior of the column under earthquake.Based on the nonlinear restoring force models of the column,the mortise-tenon joints and the bracket sets,a lumped mass model is proposed for seismic analysis of a single-storey palace-style timber structure,and the nonlinear time history analysis under seismic excitation is carried out.By comparing the time history curve of the calculated model and shaking table test results,it is found that the error between the calculated value and the experimental value without considering column rocking is relatively large.The error between the calculated peak value of the time history curve considering rocking effect and the experimental peak value is relatively small,and the peak values occur nearly at the same time.Based on the simplified model,a further parametric analysis is carried out,which shows that the vertical load can significantly reduce the seismic displacement response of the palace-style timber structure.The higher the column height,the greater the seismic displacement response of the structure.The seismic displacement response of the structure decreases significantly with the increase of the rotational stiffness of the mortise-tenon joints,and the increase of the number of bracket sets increases the lateral stiffness of the column frame,thereby reducing the seismic displacement response of the structure.The research results can provide a calculation basis for the performance evaluation of ancient timber structures under earthquake.

关 键 词：殿堂式木结构 摇摆效应 恢复力特性 非线性时程分析 集中质量模型 

分 类 号：TU366.2[建筑科学—结构工程]