刚性基层对正交异性钢-混凝土组合桥面板受力性能影响  

Influence of rigid base on the performance of orthotropic steel-concrete composite bridge deck

作　　者：傅梅珍[1] 刘永健[1] 朱伟庆[1] 王成坤[1] 琚明杰 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]东莞市公路桥梁开发建设总公司,广东东莞523010

出　　处：《合肥工业大学学报（自然科学版）》2015年第9期1242-1248,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51178051;51378068);交通运输部建设科技资助项目(2013318812410);东江梨川大桥科研课题研究资助项目(R-[2014]26-624)

摘　　要：文章提出在正交异性钢桥面板上铺设刚性基层的正交异性钢-混凝土组合桥面板结构,并依托广东某曲塔曲梁钢混混合梁斜拉桥,采用有限元分析方法,重点研究了该组合桥面板在车轮荷载作用下3个关注点应力及对应的应力集中系数,并比较分析了刚性基层厚度和弹性模量对关注点应力及应力集中系数的影响。得出如下结论:铺设刚性基层的正交异性钢-混凝土组合桥面板刚度明显提高,轮压荷载下关注点应力降低,且关注点3处应力降幅较其他2个关注点小;铺设刚性基层能降低关注点1和关注点2处应力集中系数,但是关注点3处应力集中系数反而提高;刚性基层厚度增加,关注点应力值降低,但应力集中系数增大;刚性基层弹性模量增加能降低组合桥面板极值应力及关注点应力,降低关注点应力集中系数,但刚性基层自身拉应力增加。The orthotropic steel‐concrete composite bridge deck with rigid base is put forward .Based on a steel‐concrete hybrid girder cable‐stayed bridge with curved tower and beam located in Guang‐dong ,the stress values and stress concentration factors of three stress concerns of this type of deck under the wheel load were researched with finite element analysis method ,and the influences of the thickness and elastic modulus of rigid base on the stress values and stress concentration factors of the stress concerns were analyzed .The results showed that the stiffness of orthotropic steel‐concrete com‐posite bridge deck with rigid base was improved obviously ,and the stress values of the stress concerns were all dropped under the wheel load ,and the drop degree of the third stress concern was smaller than those of the other two concerns ;setting rigid base could reduce the stress concentration factors of the first and second stress concerns ,but the stress concentration factor of the third stress concern was improved ;the thicker the rigid base ,the smaller the stress value of the stress concerns ,but the grea‐ter the stress concentration factor ;improving the elastic modulus of the rigid base would reduce the stress value and the stress concentration factor of the composite bridge deck ,but the tensile stress val‐ue itself would increase .

关 键 词：正交异性钢-混凝土组合桥面板 刚性基层 热点应力 名义应力 应力集中系数 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]