基础沉降对钢框架结构安全性影响的数值模拟研究

Numerical simulation of the effect of foundation settlement on the safety of steel frame structures

地基不均匀沉降是引起建筑物破坏的重要原因之一。为了探究地基不均匀沉降对上部结构的损伤情况,本文基于ANSYS软件平台进行了不同类型的地基沉降对两层钢框架结构安全性能影响的建模;当中柱、边柱和角柱分别发生不同沉降量时,对上部结构产生的影响进行了对比分析。研究发现:对于钢框架结构来说,柱基沉降对一层梁的影响明显大于二层;中柱和边柱沉降对上层结构的影响要比角柱沉降更加明显。研究结果可以为建筑不均匀沉降的防治提供参考。

The uneven settlement of foundation is one of the important causes leading to destruction of building. In order to investigate the damage of the upper structure due to uneven settlement of the foundation. Numerical modeling and analysis for effect of the different foundation settlement on steel frame structure have been carried out with ANSYS software. The influence of different settlement of the interior column,side column and corner column was analyzed and compared. The influence of foundation settlement on the first floor beams is obviously greater than that on the second ones. The effect of interior columns and side columns settlement on the upper structure is more obvious than the settlement of corner columns. This research can provide the basis for prevention of uneven settlement of structures.