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折线形钢梁支座水平反力及挠度试验研究
黄军超,张治新,崔文一
摘 要

(延边大学工学院土木工程系, 延吉 133002)

[摘要]选取5种不同坡度铰接折线形钢梁进行压弯试验,观察试验梁破坏形态并分析试验结果,结果表明试验梁的极限承载力随坡度的减小先下降后缓慢上升;荷载-挠度曲线表现为弹性和弹塑性;梁端水平位移较大幅度地增加了试验梁挠度,坡度越小的试验梁对梁端位移的增加越敏感。分析了考虑和不考虑支座相对位移时,坡度、钢梁跨度和集中荷载作用点等变量对钢梁的支座水平反力和跨中挠度的影响,并给出了均布荷载作用下钢梁的支座水平反力和跨中挠度,为钢筋混凝土柱-钢梁的设计提供理论依据。

[关键词]折线形钢梁; 支座水平反力; 支座位移; 挠度

中图分类号:TU391文献标识码:A文章编号:1002-848X(2018)06-0057-05

 

Experimental study of horizontal bearing reaction force and deflection on folding steel beam

Huang Junchao, Zhang Zhixin, Cui Wenyi

(Department of Civil Engineering, Yanbian University, Yanji 133002,  China)

Abstract:Compression-bending experiment was conducted on folding steel beams with five kinds of hinge forms with different gradients. The failure modes of the experimental beams were observed and the experimental results were analyzed. Results show that the ultimate bearing capacity of the experimental beams decreases first   and then increases with the decrease of the gradient slowly. The load-deflection curve features elastic and elasto-plastic. The horizontal displacement of the beam end greatly increases the deflection of experimental beams. The experimental beams with smaller gradient is more sensitive to the increase of beam end displacement. The influences of such variables as gradient, steel beam span and concentrated load acting point on horizontal bearing reaction force and mid-span deflection of steel beam were analyzed on the horizontal bearing reaction force and mid-span with and without considering the relative displacement of the support. The horizontal bearing reaction force and mid-span deflection of steel beam under uniform load were given to provide a theoretical basis for the design of reinforced concrete column-steel beam.

Keywords:folding steel beam; horizontal bearing reaction force; support displacement; deflection

 

作者简介:黄军超,硕士,Email:953782578@qq.com。

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