波形钢腹板连续刚构桥剪力滞效应的翼缘有效宽度法研究  

Research on Shear Lag Effect of Continuous Rigid Frame Bridge with Corrugated Steel Webs by Flange Effective Width Method

作　　者：熊绍伟 吴国松[2] 冉志红 宋红旭 张静 隆凯 XIONG Shaowei;WU Guosong;RAN Zhihong;SONG Hongxu;ZHANG Jing;LONG Kai(School of Architecture and Urban Planning,Yunnan University,Kunming,Yunan 650500,China;Chongqing Jiaotong University Engineering Design Research Institute Co.,Ltd.,Chongqing 400074,China)

机构地区：[1]云南大学建筑与规划学院,云南昆明650500 [2]重庆交通大学工程设计有限公司,重庆400074

出　　处：《公路工程》2020年第6期8-14,58,共8页Highway Engineering

基　　金：国家自然科学基金项目(51208452);云南省交通厅科技项目[云交科2016(A)02]。

摘　　要：为了研究波形钢腹板连续刚构桥剪力滞效应的翼缘有效宽度法,以一座悬臂施工的连续刚构桥为例,分别建立杆系有限元模型和实体有限元模型,由此得到初等梁理论下的正应力和实际正应力。采用剪力滞效应的翼缘有效宽度法对初等梁理论下的正应力进行修正,将修正的正应力与实际正应力进行对比,对翼缘有效宽度法的适用性进行评估。结果表明:悬臂施工阶段,随着悬臂长度的增加,顶板的适用性降低,底板反之,顶板的适用性优于底板;成桥阶段,顶板的适用性优于底板;整体上看,成桥阶段的适用性优于悬臂施工阶段;翼缘有效宽度法的适用性与翼缘实际宽度和理论计算跨径的比值有关。In order to study the flange effective width method of shear lag effect of continuous rigid frame bridge with corrugated steel webs,taking a continuous rigid frame bridge constructed by cantilever as an example,the finite element model of bar system and the finite element model of entity are established respectively,from which the normal stress under the elementary beam theory and the actual normal stress are obtained.The flange effective width method of shear lag effect is used to modify the normal stress under the elementary beam theory.Compared the corrected normal stress with actual normal stress,the applicability of the flange effective width method is evaluated.The results show that in the cantilever construction stage,the applicability of top plates decreases with the increase of cantilever length,but the applicability of bottom plates increases,however,the application of top plates is better than that of bottom plates;at bridge completion stage,the applicability of top plates is better than that of bottom plates.On the whole,the applicability of the bridge completion stage is better than that of the cantilever construction stage;the applicability of the flange effective width method is related to the ratio of the actual flange width to the theoretical calculated span.

关 键 词：桥梁工程 剪力滞效应 翼缘有效宽度 连续刚构桥 波形钢腹板 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]