【摘要】 通过研究 ,总结出影响预应力连续梁弯矩调幅的主要因素 ,包括支座截面的相对受压区高度、预应力次弯矩等。其中 ,预应力次弯矩一方面作为一预先存在的弹性调幅弯矩帮助调幅 ;另一方面因降低了支座截面的曲率延性 ,从而降低了荷载弯矩的调幅能力更多还原

【Abstract】 In this paper,it can be found that the main factors governing moment modulation of prestressed concrete beams includes relative height of equivalent compression zone of supports,prestress secondary moment.On the one hand the secondary moment can improve total moment modulation as a initial elastic moment modulation;on the other hand it reduces the loads moment modulation because of decreasing the ductility of supports.更多还原