抗震结构中填充墙倒塌数值模拟与分析

Collapse simulation and analysis of infill walls for earthquake-resistant structures

摘要:

为了考察填充墙的构造措施对其防平面外倒塌的影响,采用数值计算方法进行模拟与分析,基于LS-DYNA计算程序,分析了提高砂浆强度等级和采用拉结筋构造措施时,填充墙的破坏行为.结果表明:提高砂浆强度等级,设置合理的构造措施,包括设置拉结筋措施,可以有效地提高填充墙的防倒塌能力.建议对于八度设防烈度以上的填充墙框架结构,除设置全长贯通拉结筋外,应适当减小设置间距,并采取其他适当的构造措施,以确保填充墙砌块不倒塌伤人.

Abstract:

To investigate out-of-plane behavior of infilled frame due to different construction measures,collapse simulation of the structure is carried out by LS-DYNA software.The influences of construction measures of infilled frame and grades of mortar are researched,respectively.The results show that the collapse prevention capacity of infill walls is effectively improved by increasing the grade of mortar and setting steel tie bars.The space of tie bars is advice to reduce when infilled structures are beyond the eighth seismic precautionary intensity.Other reasonable measures can be also adopted to protect infill walls from collapse and ensure the safety of people’s life and possessions.