无粘结部分预应力高强混凝土梁裂缝宽度计算  

CALCULATION OF THE CRACK WIDTH FOR UNBONDED PARTIALLY PRESTRESSED CONCRETE (PPC) BEAMS WITH HIGH-STRENGTH CONCRETE

作　　者：宋永发[1] 宋玉普[1] 王清湘[1] 

机构地区：[1]大连理工大学土木工程系

出　　处：《工业建筑》1999年第4期22-25,共4页Industrial Construction

基　　金：大连理工大学海岸及近海工程国家重点实验室基金

摘　　要：通过２６根无粘结部分预应力高强混凝土梁，研究了影响裂缝宽度的主要因素。将无粘结部分预应力高强混凝土梁在使用荷载作用下的受力状态转化为偏心受压构件的受力状态，求解非预应力筋的应力，然后采用现有规范裂缝宽度计算公式来求无粘结部分预应力高强混凝土梁的裂缝宽度，计算结果与试验结果吻合较好。Based on the experimental results of 26 unbonded partially prestressed concrete (PPC) beams with high-strength concrete,the major factors which affect the crack width of unbonded beams are studied.The state under service loading of unbonded PPC beams with high-strength concrete is considered as that of eccentric compression member to solve the stress of nonprestressed reinforcement,and the crack width evaluation formula in the present code is used to calculate the crack width of unbonded PPC beams with high-strength concrete.The calculating results agree well with experimental results.

关 键 词：无粘结 高强混凝土梁 裂缝宽度 预应力 

分 类 号：TU378.801[建筑科学—结构工程]