罗山寺塔动力特性及地震响应分析

Dynamic Characteristics and Seismic Response Analysis of Luoshan Temple Pagoda

为研究罗山寺塔的动力特性及地震响应,通过原位动力测试获得罗山寺塔的各方向自振频率,并采用有限元软件对结构进行地震响应分析。研究结果表明:通过经验公式和有限元分析得到的结构特性与原位动力测试结果基本一致;各烈度地震作用下的塔身底部楼层位移角较大,塔身顶部的鞭梢效应较明显;结构的楼层水平位移随加载时程增加而增大,基底剪力与地震波加速度响应一致;塔身底部及各层拱券洞口位置的砖砌体损伤较严重。

In order to study the dynamic characteristics and seismic response of Luoshan Temple Pagoda under earthquake action,the seismic frequency of Luoshan Temple Pagoda in all directions was obtained by in-situ dynamic testing,and the seismic response of the pagoda structure was analyzed by finite element analysis model.The results show that the structural properties obtained by empirical formula and finite element analysis are basically consistent with the test results of in-situ dynamics;The displacement angle of the bottom floor of the pagoda structure under the earthquake intensity is larger,and the whipping effect at the top of the pagoda is obvious;The horizontal displacement of the structure increases with the increase of loading time,and the response of the base shear is consistent with the acceleration of seismic waves;The damage of the masonry at the bottom of the pagoda body and the openings of each layer of arch coupons is relatively serious.