预应力偏心受拉构件裂缝控制方法的探讨  

DISCUSSION ON CRACK CONTROL OF ECCENTRICALLY TENSIONED PRESTRESSED MEMBERS

作　　者：王鑫[1] 孟少平[1] 熊俊[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《工业建筑》2009年第12期18-20,24,共4页Industrial Construction

摘　　要：针对预应力偏心受拉构件,结合现行混凝土规范方法推导裂缝宽度计算公式,并利用预应力筋对结构的两阶段工作原理推导出另一种表达方式的裂缝宽度计算公式。类似于预应力混凝土承载力公式,两种方法推导出的裂缝宽度计算公式也可以实现统一,并且后一方法简化了裂缝宽度验算的步骤,便于预应力混凝土构件的裂缝控制。According to current code for design of concrete structures, the formula of crack width checking on eccentrically tensioned prestressed members was deduced. Meanwhile, another form of the formula of crack width checking was also deduced based on two-stage-working principle. Similar to the union of ultimate bending strength calculation formulas of prestressed members, the union of crack width checking formulas derived from the two methods was also realized. What＇ s more, the latter one simplified the process of crack width checking, making it easier for the crack control of prestressed concrete members.

关 键 词：预应力 偏心受拉 裂缝宽度 规范公式 等效荷载 

分 类 号：TU378[建筑科学—结构工程]