PC钢棒预应力混凝土板力学性能试验研究  

Experimental Study on Mechanical Behavior of Prestressed Concrete Slabs with PC Steel Bars

作　　者：郑文忠[1] 赵基达[2] 张宽[1] 景燕飞[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]中国建筑科学研究院,北京100013

出　　处：《建筑科学》2013年第1期33-40,共8页Building Science

基　　金：国家教育部长江学者奖励计划资助(2009-37);国家科技支撑计划子课题(2008BAE61B03-03);哈尔滨工业大学"985工程"优秀科技创新团队建设项目(2011)

摘　　要：为研究配置PC钢棒预应力混凝土板的力学性能,开展了28块PC钢棒预应力混凝土单向板三分点静载试验,测得了各试验板的荷载—位移曲线、裂缝分布及开展、开裂弯矩和极限弯矩等数据。试验结果表明,PC钢棒与混凝土粘结可靠,试验板的位移延性系数大于2.02。基于试验结果,建立了压区混凝土应变梯度影响系数和PC钢棒应力变化系数的计算公式,提出了PC钢棒预应力混凝土板正截面承载力、短期刚度和裂缝宽度计算方法。In order to study the behavior of prestressed concrete slabs with PC steel bar, the experiments of 28 slabs were carried out. The load-displacement curve, cracking load, ultimate load, crack distribution and propagation are obtained. The experiment results show that bonding behavior between the PCB and the concrete is excellent, the ductility coefficient of all the tested slabs is greater than 2.02, which proves that fairly good ductility is achieved for the prestressed concrete slabs reinforced with PCB. Based on the experiment results, a method for the calculation of a and βp is established, and the calculation formulas of flexural load bearing capacity, short term stiffness, cracking are suggested.

关 键 词：PC钢棒 预应力混凝土板 正截面承载力 短期刚度 裂缝 

分 类 号：TU378.4[建筑科学—结构工程] TU317