大尺寸薄壁加筋钢结构承载板试验评估及数值仿真

Experimental Evaluation and Numerical Simulation of Bearing Plate of Large Size Thin-Wall Steel Structure with Rib Reinforcement

对一种采用薄壁加筋钢结构的大尺寸承载板进行了试验评估和数值仿真,比较分析了其加筋前后的力学性能。对承载板进行了结构特点、力学环境和载荷分析,以及承载板结构刚度和强度的试验评估,并对薄弱部位提出了改进方案;应用ANSYS中的SHELL63单元建立了加筋前后的两种物理模型,对加筋前仿真和试验结果进行了对比验证,并对加筋前后的承载板力学性能进行了有限元比较分析。结果表明,所建立的物理模型能够较好的模拟承载板钢结构受力状态,采用的加筋方案有效提升了钢结构刚度和强度,达到了极限载荷指标要求。

The experimental evaluation and numerical simulation of a large size bearing plate with thin-walled reinforced steel structure are carried out,and the mechanical properties before and after reinforcement are compared and analyzed.The structural characteristics,mechanical environment and load of the bearing plate are analyzed,its structural stiffness and strength are evaluated by experiments.The improvement scheme for the weak parts is put forward.Two physical models before and after reinforcement are established by using SHELL63 element of ANSYS,the simulation and experimental results before reinforcement are compared and verified,and the mechanical properties of bearing plate before and after reinforcement are compared and analyzed by the finite element method.The results show that the physical model can well simulate the stress state of the steel structure of the bearing plate,and the reinforcement scheme can effectively improve the stiffness and strength of the steel structure,which meet the requirements of the ultimate load index.