独立式窑洞地震作用下损伤指标研究

定量地评估结构在地震作用下的损伤是地震工程领域的研究重点,增量动力分析方法已被广泛用于建筑结构地震易损性评估,而结构损伤指标是定量评估结构损伤情况的重要参数,山西北部农村地区的独立式土坯窑洞是一种拱受力结构体系,为研究拱结构在地震作用下的破坏特征并确立结构损伤指标,结合实际震害与数值模拟试验,分析了窑洞结构在地震作用下的破坏特征,对比了窑洞结构的顶点水平位移和拱顶竖向位移在不同地震动峰值加速度下与结构损伤情况对应关系,发现窑洞拱顶竖向位移与窑洞拱矢高作为窑洞损伤指标较为合理。

Study on Damage Measures of Detached Cave Dwelling under Earthquake

Quantitative assessment of the damage of the structure under the action of the earthquake has been focused by seismic engineering research. The incremental dynamic analysis method is widely used in structural engineering with the incremental scientific and technological progress, and structural damage index is a quantitative assessment of structural damage important parameters. The independent adobe cave in the rural areas of northern Shanxi is an arched structural system, In order to study the main failure characteristics of the arch structure under earthquake action and to establish the structural damage index, combined with the actual earthquake damage and similar structure test, the damage process of the cave structure under earthquake action is analyzed, and the vertex horizontal displacement and vault Vertical displacement with the earthquake effect of the change, it was found that the vertical displacement of cave dome and cave arch height as a cave damage index is more reasonable.