大跨度石穹顶空间结构受力行为数值模拟-《华侨大学学报（自然科学版）》

文章信息/Info

Title:: Numerical Simulation on Mechanical Behavior of Large-Span Spatial Structure with Stone Vault

Author(s):: Yang Yong; Guo Zixiong; College of Civil Engineering, Huaqiao University, 362021, Quanzhou, China

Keywords:: stone vault; mechanical behavior; numerical simulation; ANSYS program

摘要:: 大跨度石穹顶空间结构受力行为分析比较复杂,结构整体受力行为分析具有较大难度。结合工程实例,基于ANSYS程序对大跨度石穹顶空间结构进行数值模拟分析。结合结构实际受力情况及闽南地区石砌体施工工艺特点,确定结构荷载取值和材料强度取值。采用ANSYS程序中的Solid65单元和DP材料模型,并以“自上而下”和布尔操作的建模方法,建立石穹顶空间结构在施工阶段、整体成型阶段和最不利状态三维有限元分析模型·根据石穹顶空间结构在3个主要受力阶段的数值分析结果,全面研究石穹顶空间结构在各阶段的变形和应力分布等受力行为; 据此分析结果,进一步对原设计方案提出相关设计和施工建议。该工程实例中石穹顶空间结构满足强度和变形要求,基于ANSYS程序的石穹顶空间结构数值模拟技术可行。

Abstract:: It is fairly complicated to analyse mechanical behavior of large-span spatial structure with stone vault. Based on ANSYS program, the authors carry out analysis of numerical simulation on large-span structure with stone vault by combining with engineering example. The sampling of structural load and material strength are determined at first by combining with actual load-carrying situation of the structure and technological characteristic of stonework construction in south of Fujian Province. Corresponding to the spatial structure with stone vault in construction stage, stage of forming in entirety, and most detrimental state, three-dimensional models of finite element analysis are then setup. They are set up by adopting Solid 65 element and DP material model in ANSYS program and by using modelling methods of “top to bottom” and boolean operation. The mechanical behavior of spatial structure with stone vault including deformation and stress distribution in each stage is studied all round according to numerical analysis results in 3 main load-carrying stages. Suggestions about design and construction are put forward on the basis of analytical results for further improving original design scheme. As shown by the results, the spatial structure with stone vault in this engineering example meets the need of strength and deformation; the ANSYS program-based technology of numerical simulation for spatial structure with stone vault is feasible.