预应力活性粉末混凝土简支梁受力性能试验研究  

Experimental Research on Mechanical Performance of Prestressed RPC Beam

作　　者：曹霞[1,2] 彭金成[1,2] 金凌志[1,2] 

机构地区：[1]桂林理工大学广西矿冶与环境科学实验中心,桂林541004 [2]桂林理工大学广西岩土力学与工程重点实验室,桂林541004

出　　处：《武汉理工大学学报》2014年第1期116-122,共7页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51368013);广西科技攻关项目(桂科攻0995004);广西岩土力学与工程重点实验室项目(11-CX-04)

摘　　要：通过8根梁的试验研究预应力活性粉末混凝土简支梁的正截面受弯机理。开展试块的抗压、抗折强度及弹性模量等力学性能分析,进行梁的正截面承载力计算值(试验值)与理论值的对比研究。结果表明,无粘结预应力活性粉末混凝土梁的受弯过程主要分为弹性、裂缝扩展、纤维增强和破坏4个阶段,RPC在弹性阶段发挥了一定的抗拉作用,钢纤维的阻裂增强作用延缓了裂缝的开展;提出了活性粉末混凝土梁正截面承载力的计算简图。The bending mechanism of transverse section of prestressed Reactive Powder Conerete（RPC） beam were studied by the test of eight samples. The compression strength, rupture strength and elastic modulus of the RPC test block were analyzed. The test results and the theory results were compared. It shows that there are 4 phases in the destroy course of the RPC beam including elasticity, fracture, fiber reinforced and damage. In the dasticity phase, the RPC can resist some tensile stress. The extension of the beam crack is delayed by the crack resistance and strength enhanced effect of the steel fibers. The calculation diagram of transverse section of prestressed RPC beam was presented.

关 键 词：活性粉末混凝土 受弯构件 开裂弯矩 极限弯矩 

分 类 号：TU312.1[建筑科学—结构工程] TU317.1