轴心受压焊接H形钢短柱高温下局部稳定性能试验研究
发布时间：2018-11-06 18:27
【摘要】：为了研究Q235和Q460轴心受压焊接H形钢短柱高温下的局部稳定性能,采用恒温加载方式分别对6个Q235和6个(Q.460轴心受压焊接H形钢短柱试件进行常温和高温下的局部稳定性能试验,得到了常温和450、650℃下试件的翼缘和腹板局部稳定破坏形态,根据极限应变法和曲线拐点法确定试件在常温和高温下的临界荷载。采用我国现行《钢结构设计规范》和已有文献中关于局部稳定的计算方法计算试件的局部稳定临界应力,并和试验结果进行对比。研究表明:试件在高温下和常温下的破坏形态基本相同;与常温下局部屈曲承载力相比,高温下Q460高强钢试件的局部屈曲承载力较Q235普通钢试件下降幅度大;采用规范公式计算高温下焊接H形钢短柱翼缘和腹板的局部稳定临界应力与试验结果差别较大。
[Abstract]:In order to study the local stability of H-shaped steel columns welded under axial compression of Q235 and Q460 at high temperature, The local stability tests of 6 Q235 and 6 (Q.460) specimens of H-shaped steel short columns welded under axial compression were carried out at room temperature and at high temperature respectively by means of constant temperature loading. The local stable failure patterns of flange and web were obtained at room temperature and 450650 鈩，
本文编号：2315113
[Abstract]:In order to study the local stability of H-shaped steel columns welded under axial compression of Q235 and Q460 at high temperature, The local stability tests of 6 Q235 and 6 (Q.460) specimens of H-shaped steel short columns welded under axial compression were carried out at room temperature and at high temperature respectively by means of constant temperature loading. The local stable failure patterns of flange and web were obtained at room temperature and 450650 鈩，
本文编号：2315113
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