地震作用下馆藏石碑稳定性分析

Analysis of Stone Stele Stability during Earthquakes

地震作用下石碑稳定性评估是石碑抗震加固及预防性保护的前提和基础。本文分析了地震作用下石碑稳定性失稳模式,采用拟静力法推导出了整体倾覆、碑身倾覆和裂缝二次开裂三种失稳模式的稳定性计算公式;分析了榫头尺寸、裂缝粘接强度、裂缝角度、裂缝高度、地震影响系数及竖向地震等因素对石碑稳定性安全系数影响。

A scientific evaluation of the stability of stone steles during earthquake is the prerequisite and foundation of quake-proof reinforcement and preventive protection of them.This article analyzes a simulated instability mode of stone steles under earthquake.The research applies the pseudo-static method to deduce calculation equation for three modeled instability conditions when the entire body is overturned,when the main body of the stele is overturned,or when the cracks on the body widen.It further analyzes the impact of several parameters on the stability and safety of the stone steles,including the size of the tenon’s head,the bonding strength in the crack,the angle of the crack,the height of the crack,and the seismic impact as well as vertical earthquake.