大理白族民居两种木构架结构现状数值模拟  

Numerical Simulation of Two Wooden Frame Structures of the Bai Dwellings in Dali

作　　者：赵静 李燕 Zhao Jing;Li Yan(National Research Center of Cultural Industries,Central China Normal University,Wuhan 430079,China;College of Engineering,Dali University,Dali,Yunnan 671003,China)

机构地区：[1]华中师范大学国家文化产业研究中心,武汉430079 [2]大理大学工程学院,云南大理671003

出　　处：《大理大学学报》2023年第6期38-43,共6页Journal of Dali University

基　　金：云南省应用基础研究计划项目(2017FD136)。

摘　　要：研究大理白族地区木结构传统民居的整体性能,选取大理白族民居中两种常用的木构架作为研究对象,采用ANSYS有限元数值模拟的方法建立结构整体模型,分析两种木构架结构在静力荷载作用下的变形受力特点,并通过时程分析得到两种木构架结构在地震作用下的位移和加速度响应。研究结果表明:在荷载作用下,两种木构架的变形峰值均在容许范围内,构件的抗压、抗弯和抗剪承载力均满足要求。根据模态分析说明木构架纵向刚度较弱,横向刚度较纵向刚度稍大,符合结构的一般振动顺序。在模态分析基础上进行木构架动力响应分析,得出两种木构架对比,各节点的动力放大系数没有显著差异,位移和加速度反应峰值并不同时出现,存在一定的相位差,结构基本保持完好,两种大理白族民居木构架目前处于安全状态。This study focuses on the overall performance of traditional wooden dwellings in Dali Bai area.Two commonly used wooden frame structures in Dali Bai dwellings were selected as research objects,and the ANSYS finite element numerical simulation method was used to establish a structural overall model.The deformation and stress characteristics of two wooden frame structures under static load were analyzed,and the displacement and acceleration responses of the two wooden frame structures under earthquake loads were obtained through time history analysis.The results showed that under load,the peak deformation of the two wooden frames was within the allowable range,and the compressive,bending and shear bearing capacities of the components all met the requirements.According to the modal analysis,the longitudinal stifness of the wooden frame was weak,and the transverse stffness was slightly greater than the longitudinal stiffness,which conformed to the general vibration sequence of the structure.On the basis of modal analysis,the dynamic response analysis of wooden frame was carried out,obtained a comparison between two types of wooden frames,the dynamic amplification factors of each node of the two wooden frames did not show significant differences.The peak displacement and acceleration response did not appear at the same time,and there was a certain phase difference.In conclusion,the two types of Dali Bai traditional wooden frame structures are basically intact and currently in a safe state.

关 键 词：大理白族民居 穿斗式木构架 穿斗抬梁式木构架 静力分析 动力特性 

分 类 号：TU366[建筑科学—结构工程]