基于振动分析的钢筋桁架混凝土楼板等效计算模型研究  

Research on equivalent calculation model of reinforced truss concrete floor slab based on vibration analysis

作　　者：卢华喜[1,2] 蔡茂凯 刘美豪 吴必涛[1,2] LU Huaxi;CAI Maokai;LIU Meihao;WU Bitao(School of Civil Engineering,East China Jiaotong University,Nanchang 330013,China;Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学土木建筑学院,南昌330013 [2]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,南昌330013

出　　处：《建筑结构》2024年第23期113-119,78,共8页Building Structure

基　　金：国家自然科学基金项目(51868022);江西省教育厅科学技术研究项目(GJJ180300)。

摘　　要：利用数值模拟对钢筋桁架混凝土楼板进行振动特性分析时,建立实体模型较为繁琐,特别是针对大跨度楼盖结构,实体模型单元数目众多,给有限元分析带来困难。为了简化建模过程,采用刚度等效的原则提出了建立等效简易模型的新方法,分别建立了钢筋桁架混凝土单向板的各向同性等效模型和双向板的各向同性等效模型,将有限元模拟结果和楼板试验结果对比分析,验证等效模型的可行性。结果表明:两种模型求得的结果具有很好的一致性,各向同性等效模型能完全满足精度需求;使用各向同性等效模型求解所需的计算时间仅为三维实体模型的1%左右,大大节省计算资源和提高建模效率。When using numerical simulation to analyze the vibration characteristics of reinforced truss concrete floor slab,it is more complicated to establish a solid model,especially for large-span floor structure.The number of solid model elements is large,which brings difficulties to finite element analysis.In order to simplify the modeling process,a new method to establish an equivalent simple model based on the principle of stiffness equivalence was proposed.The isotropic equivalent model of reinforced truss concrete one-way slab and two-way slab were established respectively.The finite element simulation results and the floor test results were compared and analyzed to verify the feasibility of the equivalent model.The results show that the results obtained by the two models are in good agreement,and the isotropic equivalent model can fully meet the accuracy requirements.The computational time required to solve the problem using isotropic equivalent model is only about 1%of that of the 3D solid model,which greatly saves computing resources and improves modeling efficiency.

关 键 词：振动特性 钢筋桁架混凝土楼板 各向同性等效模型 刚度等效模型 

分 类 号：TU311.3[建筑科学—结构工程]