【摘要】 为保护古建筑,以四川省广元市觉苑寺逍遥楼为例,研究了汶川地震作用下,加固后的古建筑震害症状及抗震性能。根据震后勘查结果,讨论了逍遥楼的典型震害症状。根据木结构榫卯连接特点,建立了结构的有限元模型。通过模态分析,获得了逍遥楼的基频及主振型;通过对汶川波进行调幅并作用于该结构,获得地震作用下结构的内力及位移响应曲线;通过对结构进行7度罕遇地震作用下x、y双向响应谱分析,获得了结构的抗震能力。结果表明:加固后的逍遥楼振动形式以水平振动为主,在汶川地震作用下的震害程度轻,内力及变形响应峰值均在容许值范围内,且能够抵御7度罕遇地震作用。更多还原

【Abstract】 In order to protect ancient buildings,the Xiao-Yao Palace in Sichuan province is taken as an example to study damage symptoms under Wenchuan earthquake as well as aseismic capacity of strengthened ancient buildings.According to survey results after earthquake,typical damage symptoms of Xiao-Yao Palace is discussed.Then according to characters of tenon-moritse joints of chinese ancient buildings,FEM of the palace is built.By modal analysis,basic frequency as well as main modes of the structure is obtained;By dynamic analysis,dispalcement and inner force responses of the structure under Wenchuan earthquake are obtained;By response spectrum analysis under 7-degree intensity of seldomly occurred earthquke in x and y directions,aseismic capacity of the structure is obtained.Results show that after strengthened,main modes of the Xiao-Yao Palace are of level directions;Under Wenchuan earthquake the structure is destroyed little,whose displacement as well as inner forces response values are less than permissible values;The structure can also resist 7-degree intensity of seldomly occurred earthquakes.更多还原