预应力混凝土框架梁端弯矩调幅的试验研究

Experimental study on moment modification of prestressed concrete frame beam

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。

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.