一种新型SCS钢—混组合桥面系力学性能分析  

Analysis on mechanical properties of a new steel-concrete-steel composite bridge deck system

作　　者：王达[1,2] 陈春苗 刘扬[1,2] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410114 [2]桥梁工程安全控制省部共建教育部重点实验室,湖南长沙410114 [3]广州珠江黄埔大桥建设有限公司,广东广州511434

出　　处：《广西大学学报（自然科学版）》2015年第1期163-170,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家重点基础研究发展计划(973)资助项目(2015CB057701);国家自然科学基金资助项目(51308071);湖南省自然科学基金资助项目(13JJ4057);湖南省高校创新平台开放基金资助项目(12KB76);长沙理工大学桥梁工程安全控制省部共建教育部重点实验室开放基金资助项目(13QL06)

摘　　要：为应对既有正交异性桥面系在工程应用中出现的诸多病害,结合钢箱梁的构造特点,提出了一种新型钢板夹心混凝土(SCS)钢—混组合桥面系,为明确该新型SCS钢—混组合桥面系的力学特性,基于等效刚度法、结合大型通用有限元程序Ansys,分别建立了新型SCS钢—混组合桥面系与传统正交异性钢桥面系的节段力学模型,并对两个节段力学模型的受力特性进行了对比分析研究。结果发现,在汽车车轮集中荷载作用下,新型SCS钢—混组合桥面系的局部抗弯刚度明显优于传统正交异性钢桥面系,桥面系纵横向刚度比值更趋于接近1.0,结构受力变得更加均衡,局部未出现过大变形,改变了传统钢桥面系的正交异性特征,改善了桥面系结构的受力,表明该新型SCS钢—混组合桥面系具有良好的力学性能。In response to many diseases associated with the deck of existing orthotropic steel bridge,combined with the structural characteristics of steel box girder,a new steel-concrete-steel（SCS）composite bridge deck system was proposed.To reveal the mechanical properties of the systems,based on the equivalent stiffness method,the general finite element program ANSYS was employed to set up segmental mechanical models of the new SCS composite bridge deck and the traditional orthotropic steel bridge deck respectively.And a comparative analysis on the models was carried out to study the mechanical behaviors.The result shows that,under the concentrated wheel force,the local bending stiffness of the SCS composite bridge deck system is visibly superior to that of the tradi-tional one,and the longitudinal and transverse stiffness ratio tends to be 1.0,which balances the stress,prevents large local deformation,changes the orthotropic characteristics of the traditional steel bridge deck system,and improves the mechanical performance of bridge deck systems.

关 键 词：桥梁工程 钢—混组合桥面系 等效刚度法 有限元 抗弯刚度 

分 类 号：U443.32[建筑科学—桥梁与隧道工程]