烧结页岩多孔砖砌体的局部非均匀受压性能  

Experimental Study on Local Nonuniform Compression of Fired Shale Perforated Brick Masonry

作　　者：秦士洪[1] 刘小勤[1] 骆万康[1] 黄文[1] 

机构地区：[1]重庆大学土木工程学院,重庆400030

出　　处：《重庆大学学报（自然科学版）》2007年第3期136-140,154,共6页Journal of Chongqing University

基　　金：重庆市建委科研项目(城科字2000第10号)

摘　　要：为了解矩形条孔烧结页岩多孔砖砌体的非均匀局部受压性能,进行了梁端无约束和有约束2种局部受压情况下18个试件的试验研究,分析了破坏形态及受力机理,推导了局压应力图形完整系数,并对比分析了局压承载力的理论值与实测值.结果表明:墙段端部局压受力较边缘局压有利;沿局压边界产生的通长竖向裂缝大大削弱了“内拱卸荷”的有利作用;多孔砖砌体按现行规范计算有效支承长度值是偏于安全的.试验研究结果和建议可供承重多孔砖砌体结构设计和规范修订参考.In order to know the behavior of local nonuniform compression of fired shale perforated brick masonry with rectangular holes, the experimental study of 18 specimens with and without restriction at the end of beam under local compression was carried out. The failure modes and bearing mechanisms of specimens were researched and analyzed, the integrity coefficient of local compression stress figure was deduced, at last, the theoretical and testing values of local compression bearing capacity were compared and analyzed. The wall section under local compression behaves better than that results indicate that the bearing performance at the end of on the fringe, the vertical cracks throughout the specimen on the fringe caused by local nonuniform pressure weaken the advantageous function of ＇ unloading by the interior arch , the effective supporting length calculated according to code for design masonry structure is partial to safety. These results and suggestions can be used in the design of bearing perforated brick masonry for reference.

关 键 词：烧结页岩多孔砖 非均匀局部受压 有效支承长度 局压承载力 

分 类 号：TU362[建筑科学—结构工程]