带肋钢板-混凝土复合结构开裂机理研究  

Study on Crack Mechanism of Ribbed Steel Plate-concrete Composite Structure(RSPC)

作　　者：徐勇[1,2] 周志祥[2] 吴海军[2] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《武汉理工大学学报》2012年第11期98-103,共6页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50578168);交通部西部交通建设科技项目(2011 318 814 1480)

摘　　要：针对混凝土结构中局部区域拉应力过大的问题,提出了一种能有效提高抗裂能力和阻止裂缝发展的带肋钢板-混凝土复合结构。设计制作了4片带肋钢板-混凝土复合结构受弯构件和用于比较的普通混凝土受弯构件,试验结果表明:带肋钢板-混凝土复合结构抗裂能力较普通钢筋混凝土结构大得多,且其裂缝首先出现在加劲肋的上缘。根据复合材料破坏过程中的能量吸收原理,研究了带肋钢板-混凝土复合结构的开裂机理。A ribbed steel plate-concrete composite structure （RSPC） was proposed to prevent or limit flexural cracking in the negative moment region normally with a spiky rise and rapid reversal. This paper presents the results of a total of five scale specimens prepared for the comparison test, of which four specimens were reinforced with steel plate and perfo rated stiffening rib plates, one specimen was reinforced with conventional reinforcing bars. The test results indicated the cracking load for the RSPC specimen is higher than the RC specimen and its crack first happened on the top edge of the ribs. According to the principle of energy absorption, the ultimate tensile strain of the steel-concrete laminated composite was analyzed.

关 键 词：带肋钢板-混凝土复合结构 抗裂 极限拉应变 开裂机理 

分 类 号：U441[建筑科学—桥梁与隧道工程] TU398[交通运输工程—道路与铁道工程]