嵩岳寺塔地震响应及最不利受力状态分析

采用数值模拟方法对嵩岳寺塔在多遇、设防和罕遇地震作用下的地震响应及最不利受力状态进行了分析，为后续结构安全动态监测提供了基础数据。分析结果表明:质量和刚度关于中轴面呈对称分布，塔身结构整体性较好。地震作用下，结构呈现一阶弯曲变形，没有表现出明显的鞭梢效应。1层塔身的变形最为严重，是结构的薄弱环节。罕遇地震作用下，上部塔身开始进入弹塑性状态，其他情况下仍处于弹性状态。结构承压性能较好，但门洞顶部的水平抗拉承载力存在一定不足，7层以下塔身外侧的竖向抗拉承载力存在一定不足，12层以下塔身中轴面附近的抗剪承载力存在一定不足，且门洞顶部受剪最严重。

Seismic response and the most unfavorable stress state analysis of the pagoda in Songyue Temple

In order to provide basic data for forthcoming dynamic monitoring of the pagoda’s safety in Songyue Temple, its seismic response and the most disadvantaged stress status with the action of frequent earthquakes, fortification earthquakes and rare earthquakes were studied by numerical simulation method. The results indicated that the integrity of the structure, with the symmetrical distributions of the mass and stiffness in the axial plane, is good enough. Under the action of earthquake, the pagoda’s response is dominated by the first-order bending deformation. The ground floor, as weak link of the structure, has the most serious deformation. Under the action of rare earthquakes, the upper body enters elastic-plastic status while itis still in elastic status in other cases. Compared with its redundant bearing capacity, there are some deficiencies of the horizontal tensile capacity at the top of the gate, and the vertical tensile capacity of the outside below 7th floor. Moreover, the shear capacity near middle surface below 12th floor is insufficient, especially at the top of the gate.