新桥规考虑混凝土影响后受扭构件强度计算  

Torsional Strength Calculation Method Taking into Account ofConcrete′sEffect

作　　者：于华强[1] 雷俊卿[1] 鲍卫刚[2] 

机构地区：[1]北方交通大学,北京100044 [2]中交公路规划设计院,北京100010

出　　处：《公路交通科技》2004年第2期44-47,共4页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(50178004);交通部公路桥梁规范资助项目

摘　　要：与现行《公路钢筋混凝土及预应力混凝土桥涵设计规范》相比,新修订的《公路钢筋混凝土及预应力混凝土桥涵设计规范》对矩形和箱形截面钢筋混凝土纯扭构件及承受弯剪扭构件的承载力计算作了较大的改动。在推荐的公式中修正了纵向钢筋与箍筋的配筋强度比的取值并充分考虑了混凝土的抗扭作用,并通过设计实例说明了新设计方法的优越性。Significant improvement has been made of calculating the design value of the torsional strength of rectangular and box section under the new version of Design Specifications for Highway RC Bridge and Culvert.In comparson to the current version(JTJ023-85),a new formula for calculating the design value of torsional strength is provided in the revised Specifications taking into account the effect of the concrete,and it has modified the strength ratio between the longitudinal bar and the stirrup.Design examples are given to illustrate the advantages of the new method.

关 键 词：桥梁工程 弯剪扭作用 混凝土的抗扭能力 配筋率 

分 类 号：U448[建筑科学—桥梁与隧道工程]