脉冲荷载作用下承重砌体墙动力行为分析  

Dynamic behavior analysis of load-bearing masonry wall under impulse load

作　　者：谭英华 王国梁 李阳 胡亚超 席丰[1] TAN Yinghua;WANG Guoliang;LI Yang;HU Yachao;XI Feng(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《山东建筑大学学报》2023年第4期10-18,共9页Journal of Shandong Jianzhu University

基　　金：山东建筑大学博士科研基金项目(X18076Z0101)。

摘　　要：承重墙是砌体结构体系中的竖向承重构件,考察爆炸载荷作用下墙体的动力行为,对居民的生命和财产安全防护具有重要意义。文章利用有限元软件分析了三角形脉冲荷载作用下烧结普通砖砌体承重墙的动力响应,通过模拟现有砌体墙抗爆试验,验证了有限元模型的正确性和有效性,并基于位移加载法,确定承重墙的竖向极限荷载值,分析了竖向荷载、墙体高厚比、砌体材料强度等级对承重墙抗爆性能的影响。结果表明:当竖向荷载较小(荷载比μ≤0.5)时,墙体失效由墙端支座转角控制,承重墙的抗爆性能随着竖向荷载的增大得到一定程度的提升,而当竖向荷载较大(荷载比μ=0.8)时,其值对承重墙抗爆性能不利;承重墙P-I图的准静态渐近线受墙体高厚比影响较大,随着高厚比增加,承重墙抗爆性能显著降低;而材料强度等级对承重墙抗爆性能影响则较小。Load-bearing wall is a vertical load-bearing component in the masonry structure system.It is of great significance to investigate the dynamic behavior of the wall under explosion load for the safety protection of residents lives and property.In order to improve the research on its anti-explosion performance,the dynamic response of sintered common brick masonry bearing wall under triangular pulse load is analyzed by using the finite element software.The accuracy and validity of the finite element model are confirmed through simulations of existing anti-explosion tests on masonry walls.Based on the displacement loading method,the vertical ultimate load value of the bearing wall is determined,and the effects of vertical load,wall height-thickness ratio and masonry material strength grade on the explosion performance of the bearing wall are analyzed.The results show that when the vertical load is small(load ratioμ≤0.5),the wall failure is controlled by the corner of the wall end support,and the anti-explosion performance of the bearing wall is improved to a certain extent with the increase of the vertical load;when the vertical load is large(load ratioμ=0.8),the vertical load is unfavorable to the anti-explosion performance of the bearing wall.The quasi-static asymptote of the P-I diagram of the bearing wall is greatly affected by the height thickness ratio of the wall.As the height-thickness ratio increases,the anti-explosion performance of the bearing wall decreases significantly.The material strength grade has little effect on the anti-explosion performance of the bearing wall.

关 键 词：砌体承重墙 三角脉冲荷载 P-I图 动力行为 抗爆性能 

分 类 号：TU365[建筑科学—结构工程]