高温下的H型截面钢框架耐火性能影响因素有限元分析

在有限元模拟的基础上,介绍了高温下的钢框架在随着温度增加,结构呈现出不同的热效应,采用数值模拟软件对不同影响因素下的两层两跨H型截面钢框架耐火性能的研究,包括不同模型在不同高跨比下对钢框架结构力学性能的对比分析,以及不同模型在不同荷载种类与荷载大小下对钢框架结构力学响应的比较,研究表明:通过有限元分析能够得出,高跨比较大的钢框架对结构有利,转动约束刚度较小的钢框架结构力学性能较好。研究成果可为高温下的钢框架选优提供参考价值。

Finite Element Analysis on Fire Resistance of H-section Steel Frame Under High Temperature

Based on the finite element simulation, it is introduced that the steel frame at high temperature shows different thermal effects with the increase of temperature. Numerical simulation software is used to study the fire resistance of two-story two span H-section steel frame under different influencing factors, including the comparative analysis of the mechanical properties of steel frame structure under different height span ratio of different models, and the comparison of the mechanical response of steel frame structure under different load types and load sizes of different models. The research shows that the steel frame with large height span ratio is beneficial to the structure, and the steel frame with small rotational restraint stiffness has better mechanical properties. The research results can provide reference value for the optimization of steel frame under high temperature.