地震区居民建筑钢结构极限承载力测试与分析

传统方法一般依据静力检测数据测试居民建筑钢结构的极限承载力,对构件数量的要求较高,无法量测隐蔽构件,测试结果精度低。因此提出基于振动参数以及动力模型修正的地震区居民建筑钢结构极限承载力预测与分析方法,分析建筑钢结构振动参数与极限承载能力的关系,塑造地震区居民建筑钢结构简化以及振动方程,获取其极限载荷与振动参数间的关系。采用基于动力模型修正的极限承载力评估方法,基于动力模型修正理论,采用线性屈曲法、几何非线性法以及双重非线性分析法,对地震区居民建筑钢结构极限承载力进行检测。实验结果说明,所提方法能对居民建筑钢结构立柱轴向性和大钩荷载关系以及荷载-扰度曲线,且实施数值运算效果好,预测获取的极限承载力值精度高,建筑的钢结构状态比较稳定。

Test and Analysis of the Ultimate Bearing Capacity of Residential Building Steel Structures in Seismic Areas

Traditional methods used to test the ultimate bearing capacity of residential building steel structures are generally based on static test data and have high requirements for several of their components. However, these methods cannot measure hidden components, thus providing low-accuracy test results. Therefore, a method based on vibration parameters and dynamic model updating is proposed to predict and analyze the ultimate bearing capacity of residential building steel structures in a seismic area in this study. The relationship between vibration parameters and the ultimate bearing capacity of building steel structures was analyzed, and the simplified vibration equation was derived to determine the relationship between vibration parameters and limit load. Based on the dynamic model updating theory, the linear buckling method, geometric nonlinear method, and double nonlinear analysis method were adopted to detect the ultimate bearing capacity of residential building steel structures in an earthquake area. The experimental results show that the proposed method is effective in analyzing the hook load and load-deflection relation curve of residential building steel structures. Furthermore, the effect of numerical calculation is good, and the precision of predicted ultimate bearing capacity is high.