摘要
为有效指导太原祥云桥主桥(独塔钢-混凝土混合梁斜拉桥)施工、保证施工过程中结构的安全,需对施工过程中结构的内力进行验算、对结构参数进行影响量分析。采用有限元软件MIDAS Civil建立祥云桥各施工阶段有限元模型,对结构进行计算分析,并通过正装迭代法确定大桥合理成桥状态及斜拉索初张力。分析结果表明,成桥索力和钢箱梁重量属结构敏感性参数,在理论计算对结构参数修正时是需要重点识别的结构参数;祥云桥在施工过程及成桥阶段的内力均满足规范要求。成桥索力的测试结果及对大桥运营阶段的受力验算表明,成桥状态各结构参数均满足规范要求。
To provide effective guidance for construction of the main bridge（a steel and concrete hybrid girder cable-stayed bridge with a single pylon） of the Xiangyun Bridge in Taiyuan and to ensure the structural safety of the bridge in the construction process,the calculation of the structural internal forces in the construction should be checked and the analysis of the influence amount of the structural parameters should be made.The finite element models for various construction stages of the bridge were therefore established by the software MIDAS Civil,the structure of the bridge was calculated and analyzed and the rational completed bridge status and initial tensile forces of the stay cables were determined by the forward iteration method.The results of the analysis show that the stay cable forces and steel box girder weight of the completed bridge are the structural sensitivity parameters that should be particularly identified in the modification of the parameters in the theoretic calculation.The internal forces of the bridge in the construction process and at the completed bridge stage can meet the relevant requirements in the codes.The measurements of the stay cable forces of the completed bridge and the calculation of the force conditions of the bridge at operation stage also show that the various structural parameters of the bridge can meet the requirements as well.
出处
《桥梁建设》
EI
CSCD
北大核心
2011年第5期81-85,共5页
Bridge Construction
关键词
斜拉桥
混合梁
独塔
施工控制
仿真分析
cable-stayed bridge
hybrid girder
single pylon
construction control
simulation analysis
