承托设置对波形钢腹板箱梁桥面板横向内力的影响  

Influence of Support Setting on Transverse Internal Force in Deck of Box Girder Bridge with Corrugated Steel Webs

作　　者：赵品 荣学亮 叶见曙[2] ZHAO Pin;RONG Xue-liang;YE Jian-shu(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;School of Transportation,Southeast University,Nanjing Jiangsu 210096,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]东南大学交通学院,江苏南京210096

出　　处：《公路交通科技》2020年第8期41-47,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51508348);河北省自然科学基金项目(E2017210191,E2017210183);河北省教育厅科技项目(QN2015134);河北省大型结构健康诊断与控制实验室(KLLSHMC1913)。

摘　　要：制作了两片单箱双室波形钢腹板试验梁,分为桥面板加承托和不加承托。以室内试验、有限元分析结合理论推导来探讨混凝土桥面板承托的设置对波形钢腹板箱梁桥面板横向受力的影响。通过静力试验,对试验梁桥面板的受力特点和箱梁变形进行了观测和分析。将两片梁的相关试验数据进行对比,并结合有限元分析结果、理论分析结果,得出结论如下:承托的设置对箱梁的结构性能是有一定影响的。桥面板承托的设置增强了箱梁的抗弯、抗扭刚度,减少扭转剪应力和畸变应力,加大了桥面板支点刚度,力线过渡比较均匀,减小次内力;使得箱梁挠度较不加承托时同一工况下的相应值均有一定程度的减小,约为15%。承托的设置对桥面板的有效分布宽度影响很小,加承托与不加承托的单向板的有效分布宽度误差仅为5%;但是承托的设置对波形钢腹板箱梁桥面板的横向内力存在一定影响,综合试验结果和力学分析结果,加设承托与否对桥面板横向受力的影响一致,且影响值均在10%以上。总之,对于波形钢腹板箱梁而言,从自身构造上来讲波形钢腹板与承托这两类因素均会对桥面板横向受力产生一定影响,不可忽略。Two single-box double-cell test girders with corrugated webs,which are divided into the deck with and without support,are made.The influence of setting of concrete bridge deck support on the transverse stress of box girder with corrugated steel webs is discussed through indoor experiment,finite element analysis and theoretical derivation.The mechanical characteristics of the deck of test girder bridge and the deformation of the box girder are observed and analyzed through static test.The relevant test data of the 2 girders are compared.According to the results of finite element analysis and theoretical analysis,it is concluded that(1)The support setting has a certain influence on the structural performance of the box girder.The setting of deck support enhances the flexural stiffness and torsional stiffness of the box girder,reduces the torsional shear stress and the distortion stress of the box girder,it increases the fulcrum stiffness of the deck with uniform force line transition,and reduces the secondary internal force.Therefore,the deflection of the box girder is reduced to a certain extent(about 15%)compared with the corresponding value under the same working condition without support.(2)The support setting has little influence on the effective distribution width of the bridge deck,and the error of the effective distribution width between the one-way boards with and without support is only 5%.However,the support setting has a certain influence on the transverse internal force of the deck of the box girder bridge with corrugated steel webs.Combining the test result and the mechanical analysis result,whether setting support or not has the same influence on the transverse internal force of the bridge deck,and the influence value is more than 10%.In short,for the box girder with corrugated steel webs,both corrugated steel webs and support will have certain influence on the transverse internal force of the bridge deck,and they cannot be ignored.

关 键 词：桥梁工程 有效分布宽度 面板 承托 波形钢腹板箱梁桥 横向内力 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]