砖墙(柱)-木屋架古建筑结构静力破坏机制与稳定性能指标  

Static failure mechanism and performance index of brick wall (column) -wooden house frame ancient building

作　　者：葛家琪 赵强 马伯涛 朱鸿钧 周萍 刘鑫刚 GE Jiaqi;ZHAO Qiang;MA Botao;ZHU Hongjun;ZHOU Ping;LIU Xingang(China Aviation Planning and Design Institute,Beijing 100120,China;Shaanxi Institute for the preservation of Cultural Heritage,Xi’an 710075,China;Emperor Qinshihuang’s Mausoleum Site Museum,Xi’an 710699,China)

机构地区：[1]中国航空规划设计研究总院有限公司,北京100120 [2]陕西省文物保护研究院,陕西西安710075 [3]秦始皇帝陵博物院,陕西西安710699

出　　处：《建筑结构学报》2023年第8期56-64,共9页Journal of Building Structures

基　　金：国家重点研发计划(2019YFC1521000)。

摘　　要：针对砖石质古建筑中普遍存在的砖墙(柱)-木屋架结构,以某文物展馆为例,建立了符合古建筑材料、构造机理特征的离散体分析模型。选取4种不同筑砌方式,对砖石质古建筑的损伤产生及破坏机制进行了研究;对砖柱不同高宽比及界面不同摩擦系数的砖柱-木屋架结构进行静力推覆分析,得到了不同工况下的柱顶水平荷载-位移全过程性能曲线;重点将砖石质古建筑从屈服损伤到临界失稳过程与全过程性能曲线中对应的性能点进行对比研究,发现柱竖向位移角峰值点为结构临界失稳极限点。研究了稳定性能指标对应性能点确定方法:对于结构不发生明显损伤的水平位移角限值,在砖柱高宽比为8、10和大于12时,分别为1/240~1/200、1/290~1/250、1/340~1/300;对于结构静力稳定状态的水平位移角限值,在砖柱高宽比为8、10和大于12时分别为1/40、1/70、1/100。Aiming at the structures composed of brick walls(columns)and wooden roof trusses commonly used in ancient masonry buildings,considering a cultural relics exhibition hall as an example,a discrete body analytical model that conforms to the characteristics of ancient building materials and the structural mechanism is established.Four different masonry construction methods are selected to study the damage initiation and failure mechanism of ancient masonry buildings.The static pushover analysis is carried out for the brick column-wooden roof truss structure with different aspect ratios and different friction coefficients,and the whole process load-displacement curve of ancient buildings under different working conditions is obtained.This research is focused on comparing the instability process of masonry ancient buildings from yield damage to critical failure and the corresponding performance points in the whole process performance curve.It is found that the peak vertical displacement ratio of the column is the critical instability point of the structure.The method for determining the corresponding performance points of the stability performance indicators is studied.The displacement ratio limits without obvious damage to the structure are 1/240-1/200,1/290-1/250,1/340-1/300,respectively when the height-to-width ratios of the brick column are 8,10,and greater than 12.The limits of lateral displacement ratio in the static stable state of the structure are taken as 1/40,1/70,1/100,respectively.

关 键 词：砖石质古建筑 静力推覆 损伤累积 稳定性 性能指标 

分 类 号：TU398.4[建筑科学—结构工程] TU311.2