摘要
针对钢箱梁人行天桥结构耐腐蚀性差,稳定性一般等特点,本文在研究活性粉末混凝土的力学性质及利于MATLAB推导其本构关系的基础上,提出了将活性粉末混凝土应用于既有人行天桥作为桥面板使用的设计,以钢-RPC组合箱梁作为桥梁上部结构的工程方法。ABAQUS计算结果表明改造后人行天桥承载力更大、各构件受力更加合理且更加美观。钢-RPC组合箱梁结构可在其他人行天桥工程改造和新建工程中推广使用。
In view of the poor corrosion resistance and general stability of the steel box girder pedestrian bridge structure,based on the study of the mechanical properties of reactive powder concrete and the derivation of its constitutive relationship by MATLAB,this paper puts forward the engineering method of applying reactive powder concrete to the design of the existing pedestrian bridge as the bridge deck and the steel-rpc composite box girder as the bridge superstructure.The results of ABAQUS calculation show that the bearing capacity of the pedestrian overpass is larger,the bearing capacity of each component is more reasonable and beautiful after the reconstruction.The steel-rpc composite box girder structure can be widely used in other pedestrian overpass projects.
作者
吕平
龙佩恒
何国顺
LYU Ping;LONG Peiheng;HE Guoshun(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Engineering Structure and New Materials Engineering Research Center of Beijing Higher Education Institutions,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《建筑结构》
CSCD
北大核心
2020年第S01期857-861,共5页
Building Structure
基金
国家青年自然科学基金项目(51508019)
国家青年自然科学基金项目(51308027)
北京市自然科学基金面上项目(8162012)
建设部研究开发项目(2015-R2-039)
北京市优秀人才培养-青年拔尖个人(21351916004)
土木工程防灾国家重点实验室开放基金资助(SLDRCE-14-02)
关键词
活性粉末混凝土
人行天桥
力学性能
改造工程
箱梁
reactive powder concrete
pedestrian overpass
mechanical properties
reconstruction project
box girder
