接触爆炸下黏土砖砌体墙的抗爆性能

为了研究接触爆炸下黏土砖砌体墙的抗爆性能,采用LS-DYNA有限元软件,以传统单面黏土砖砌体墙为例,建立了黏土砖砌体墙三维分离式细观模型,分析了不同强度接触爆炸载荷下墙体的毁伤和破坏特征。使用两种不同质量的TNT炸药对普通黏土砖墙体在单方向支撑条件下进行了对应的接触爆炸试验验证,并研究其工作机理及响应特性。分析结果表明,随着爆炸载荷的逐渐增加,接触爆炸对墙体的破坏形式主要由中央爆坑以及水平、竖直方向的十字形裂纹的形成,转化为灰缝的层裂、崩落、贯穿以及墙体的错位和倒塌。

Anti-explosion Performance of Clay Brick Masonry Wall under Contact Blast Load

In order to study the anti-explosion performance of clay brick masonry wall under contact blast load, finite element software LS-DYNA was used to establish a three-dimension separately refined model as an example for the traditional single-sided clay brick masonry wall. The damage and failure characteristics of the wall under different intensities of contact blast load were analyzed. TNT explosives with two different weights were used in the corresponding contact explosion experiments of ordinary clay brick walls supported in one direction. Then the working mechanism and response characteristics were studied. Results show that with the increase of blast load, the failure mode of wall under contact blast load mainly changes from central crater and cross crack to spallation, collapse, penetration of mortar, and dislocation and collapse of the wall.