（重庆大学土木工程学院，重庆  400045）

［摘要］通过六榀接近足尺后张有粘结预应力混凝土框架塑性内力重分布的试验研究，分析了预应力混凝土框架梁截面相对受压区高度、预应力度、初始次弯矩、梁两端弯矩不相等等主要因素对预应力混凝土框架中梁端弯矩调幅的影响规律，并针对不同情况提出了适当的调幅设计建议。

［关键词］预应力混凝土框架；荷载弯矩；次弯矩；弯矩调幅

Experimental study on moment modification of prestressed concrete frame beam

Chen Mingzheng， Huang Yin，  Jian Bin， Bai Shaoliang，  Wang Zhenglin

(College of Civil Engineering, Chongqing University, Chongqing 400045，China)

Abstract:According to the experiment of internal force redistribution to six full-size post-tentioned prestressed concrete frames, the moment modification rules of prestressed concrete frame influenced by some factors are analyzed.These factors are the relative height of equivalent compression zone, prestressing ratio, secondary moment, and the difference in the moment of the beam between both ends. As a result, the proper design proposals are suggested to each situation.

Keywords:prestressed concrete frame;  load moment;  secondary moment;  moment modification

*重庆市自然科学基金资助项目(CSTS，2004BB0058)。

作者简介：陈明政，博士，讲师，Email:chenmingzhengcmz@163.com。