高性能钢梁的整体稳定性

Global Stability of High-performance Steel Beams

摘要:

设计了6根Q460和Q500高性能钢梁试件，并进行了受弯整体稳定性试验。考虑试件的初始缺陷，采用Abaqus软件建立有限元模型并对试验过程进行模拟，最后将试验结果和有限元模拟结果与《钢结构设计标准》（GB 50017―2017）、《公路钢结构桥梁设计规范》（JTG D64―2015）中的相关内容进行对比，以校验上述规范对高性能钢梁的适用性。结果表明：荷载?位移曲线的数值模拟结果与试验结果吻合较好；《钢结构设计标准》（GB 50017―2017）和《公路钢结构桥梁设计规范》（JTG D64―2015）对Q460和Q500高性能钢梁整体稳定性计算的适用性较强。

关键词:高性能钢;钢梁;整体稳定性;有限元分析

Abstract:

Six specimens of high-performance steel beams made of Q460 and Q500 steel were designed to study the overall stability in bending. Considering the initial defects of the specimens， a finite element model was established via Abaqus to simulate the test process. Finally， the test and finite element simulation results were compared with the relevant provisions of the Standard for Design of Steel Structures （GB 50017―2017） and the Specifications for Design of Highway Steel Bridge （JTG D64―2015）. It is shown that the simulated load-displacement curve is in good agreement with the test results； the applicability of the two codes on the overall stability of Q460 and Q500 high-performance steel beams is verified.

Key words:high-performance steel;steel beam;global stability;finite element analysis