波纹钢腹板体外预应力箱梁混凝土块式转向装置力学性能研究  

RESEARCH ON MECHANICAL CHARACTERS OF CONCRETE BLOCK DEVIATOR USED IN EXTERNALLY PRESTRESSED BOX GIRDER WITH CORRUGATED WEBS

作　　者：杨明[1] 黄侨[1] 马文刚[1] 黄志伟[1] 

机构地区：[1]东南大学交通学院,南京210096

出　　处：《工程力学》2012年第2期185-191,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51078078)

摘　　要：针对波纹钢腹板体外预应力箱梁结构的力学和构造特点,采用有限元分析与试验研究相结合的方法,研究用于波纹钢腹板体外预应力箱梁的混凝土块式转向装置的承载机理、受力特点、破坏形态、极限承载力等力学特性。试验和有限元分析的结果吻合良好。研究结果表明,转向装置对混凝土翼缘板的局部影响集中在转向块与梁体连接的部分及附近区域内,混凝土块式转向装置的破坏由受拉区混凝土受拉破坏和环向钢筋受拉屈服引起,环向钢筋的受力表现出明显的偏心受拉构件的受力特点。According to mechanical and structural characters of an externally prestressed box girder with corrugated webs,and mechanical performance such as load bearing mechanism and mechanical characters,the damage form and ultimate load capacity of concrete block deviator used in externally prestressed box girder with corrugated webs are studied using FEA and experimental methods.Experiment and FEA results fit each other well.The research indicates that the local influence caused by a deviator in concrete flange concentrates in the joint of the deviator and concrete flange and its nearby location,the damage of the deviator is caused by concrete tension damage and reinforcement tension yield,the round reinforcements show obvious characteristics of an eccentric tension member.

关 键 词：桥梁工程 力学性能 试验 非线性有限元分析 波纹钢腹板体外预应力箱梁 混凝土转向块 

分 类 号：U441[建筑科学—桥梁与隧道工程] U448.21[交通运输工程—道路与铁道工程]