横向配筋砖砌体局压性能研究

通过8组不同配筋率及砂浆强度的网状配筋砖砌体试件的中部局压试验,分析了砌体的裂缝开展情况、破坏形态及横向钢筋与砂浆两者的协同工作性能;并利用有限元软件ANSYS对砌体试件局压破坏过程进行了数值模拟,采用分离式模型,分别用Solid45和Solid65单元模拟砖块和砂浆,并运用不同的破坏准则对砌体内部应力进行了模拟计算,并与试验结果对比。提出横向配筋砖砌体中部局压承载力公式。

Study on local compression of horizontally reinforced masonry

8 groups of local compression tests at middle part of masonry with reinforced network are set up,which is different in ratios of steel rod and mortar strengths.Crack,destruction properties and cooperation performance of steel rod and mortar are analyzed.With the finite element analysis software ANSYS,numerical analogue of local compression is conducted for destruction process of tested blocks.With isolated model,Solid45 and Solid65 for brick and mortar,internal stress contribution of block is calculated with different destruction criteria,and the calculating bearing capacity are compared with the test results.At last,bearing capacity formula of local compression at middle part of horizontally reinforced masonry is proposed.