【摘要】：為了研究Q235和Q460軸心受壓焊接H形鋼短柱高溫下的局部穩(wěn)定性能,采用恒溫加載方式分別對6個Q235和6個(Q.460軸心受壓焊接H形鋼短柱試件進行常溫和高溫下的局部穩(wěn)定性能試驗,得到了常溫和450、650℃下試件的翼緣和腹板局部穩(wěn)定破壞形態(tài),根據(jù)極限應變法和曲線拐點法確定試件在常溫和高溫下的臨界荷載。采用我國現(xiàn)行《鋼結(jié)構(gòu)設計規(guī)范》和已有文獻中關(guān)于局部穩(wěn)定的計算方法計算試件的局部穩(wěn)定臨界應力,并和試驗結(jié)果進行對比。研究表明:試件在高溫下和常溫下的破壞形態(tài)基本相同;與常溫下局部屈曲承載力相比,高溫下Q460高強鋼試件的局部屈曲承載力較Q235普通鋼試件下降幅度大;采用規(guī)范公式計算高溫下焊接H形鋼短柱翼緣和腹板的局部穩(wěn)定臨界應力與試驗結(jié)果差別較大。
[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，

本文編號：2315113