Q345B H型钢高应变低周疲劳性能研究

Research on High-strain-and-low-cycle Fatigue Properties of Q345B H-section Steel

根据建筑用钢在地震时的受力状态，阐述了钢材的高应变低周疲劳性能在抗震设计中的重要性，讨论了静载荷强度、塑性与低周疲劳性能间的关系，并对材料在高应变和地震载荷谱下的疲劳性能进行了研究，试验结果表明莱钢生产的Q345BH型钢在地震谱载荷下具有较好的抗震性能。

This paper expounds the importance of high-strain and low-cycle fatigue of steel products in anti-quake design in the light of stressed state of constructional steel in earthquakes, discusses the relation- ship among dead load strength, plasticity and low cycle fatigue properties and studies the fatigue proper- ties of materials under high strain and seismic load spectrum, with the test results showing that Q345B H- section steel made in Laigang possesses favorable anti-quake properties under seismic-spectrum load.