某地下车库拱形结构方案可行性和优化研究

对某地下车库混凝土拱形结构方案的可行性和优化进行了全面和深入的研究,本着由简单到复杂、由局部到整体的分析原则,依次采用梁单元模型、多跨壳单元模型以及结构整体模型分别进行了计算分析。结果表明,拱形结构方案是合理可行的,最优方案为上部混凝土拱采用"拱梁+拱板"的形式,拱梁每隔一定间距设置,两端支撑在挡土墙外侧斜撑和中柱上,下部底板结构同样采用"底梁+底板"的形式,底梁与相应的斜撑和中柱连成整体,充当上部拱结构的拉杆。此外通过对结构整体模型的分析,对构件设计提出了合理的设计建议。

Feasibility and Optimization Study on an Arch-Structure of Underground Parking Garage

This paper presents a total and deep study on the feasibility and optimization of an arch concrete structure of underground parking garage.Based on the analysis principle from simplicity to complexity and from the part to the whole,computation is made by using beam model,shell model and structure integral model respectively.The results indicate that the arch structure scheme is feasible and the optimal structure form is that the upper concrete arch adopts arch beams and arch plate,the arch beams are set in the same distance and are supported on diagonal braces and mid columns,and the bottom base structure includes base beams and base plate,the base beams are connected with relevant diagonal braces and mid columns as the tension member of upper arch structure.In addition by the analysis of structure integral model,the rational suggestions are put forward in the member design.