CAJ | 학술논문

结合某斜拉桥实际工程，建立了考虑界面粘结滑移的有限元仿真模型，分别研究了不同剪力钉刚度对组合梁斜拉桥界面滑移、挠度、应力应变特性以及极限承载能力的影响．结果表明：剪力钉刚度对组合梁界面滑移值以及桥梁竖向挠度均有影响，界面滑移值和桥梁的竖向挠度均随着剪力钉刚度的减小而增大，当界面无剪力钉时，其跨中挠度增幅达22.2％．应变沿梁高的分布规律偏离平截面假定的程度随着剪力钉刚度的减小而增大，随着剪力钉刚度的减小，组合梁截面中和轴下移，将导致混凝土出现受拉的情况．剪力钉刚度对组合梁斜拉桥的极限承载能力影响较大，当混凝土板和钢梁界面无剪力钉时，结构的活载系数和整体安全系数减小约一半．
결합모사랍교실제공정，건립료고필계면점결활이적유한원방진모형，분별연구료불동전력정강도대조합량사랍교계면활이、뇨도、응력응변특성이급겁한승재능력적영향．결과표명：전력정강도대조합량계면활이치이급교량수향뇨도균유영향，계면활이치화교량적수향뇨도균수착전력정강도적감소이증대，당계면무전력정시，기과중뇨도증폭체22.2％．응변연량고적분포규률편리평절면가정적정도수착전력정강도적감소이증대，수착전력정강도적감소，조합량절면중화축하이，장도치혼응토출현수랍적정황．전력정강도대조합량사랍교적겁한승재능력영향교대，당혼응토판화강량계면무전력정시，결구적활재계수화정체안전계수감소약일반．
Based on an actual engineering of cable-stayed bridge in practice,the FE modal considering the in-terfacial bond-slip effect is constructed.The effect of shear studs'stiffness on the interface slippage,deflection, stress and strain performance and the ultimate bearing capacity of the composite beam stayed-cable bridges are studied respectively.The results show that the stiffness of shear studs can influence the interface slippage of composite beams and the deflection of bridge,both the interface slippage and the deflection of the bridge in-crease rapidly with the decrease of the shear studs'stiffness.The growth amplitude of the mid-span's deflection reaches 22.2% if there are no shear studs in the interface.With the decrease of the stiffness of shear stud,the law of strain distributed along the height of beam largely diverges from the plane cross-section assumption,the neutral axis of section will move down,which will lead to the tension stress occurring in the concrete slab.The effect of the shear connectors'stiffness on the ultimate bearing capacity of composite beam cable-stayed bridge is very large,and the coefficients of live load and structural safety will decrease by nearly a half when there are no bonds between the concrete slabs and the steel beams.