预应力混凝土连续梁弯矩调幅的延性要求  

DUCTILITY REQUIREMENT IN THE MOMENT REDISTRIBUTION OF PRESTRESSED CONCRETE CONTINUOUS BEAMS

作　　者：简斌[1] 白绍良[1] 王正霖[1] 

机构地区：[1]重庆建筑大学建筑工程学院,重庆400045

出　　处：《工程力学》2001年第2期51-57,共7页Engineering Mechanics

基　　金：国家自然科学基金重点项目!(59338130)

摘　　要：本文采用能量法对普通钢筋混凝土连续梁和预应力混凝土连续梁的弯矩调幅与截面 曲率延性之间的关系进行了研究。重点讨论了预应力连续梁中次弯矩和轴向预压力对弯矩调 幅的影响。从理论上证明了预应力次弯矩在塑性铰转动能力不够时能提高连续梁弯矩调幅能 力的这一观点。Principle of energy is used to study the moment redistribution and the section curvature ductility in reinforced and prestressed concrete continuous beams. The emphasis is placed on the influence of the secondary moment and the axial prestress on the moment redistribution. It is shown that the secondary moment can facilitate the moment redistribution when the rotational capacity of plastic hinge is not enough. In the process of investigation some simplifications are made, such as the relation between moment and curvature is simplified as a broken line. However, the result can not be effected significantly.

关 键 词：弯矩调幅 次弯矩 延性 预应力混凝土连续性 

分 类 号：TU378.2[建筑科学—结构工程]