组合梁抗弯极限承载力参数影响分析

为研究组合梁抗弯极限承载力的参数影响规律,利用有限元软件ABAQUS建立有限元模型进行数值模拟。结果表明,钢梁强度、钢梁腹板厚度、钢梁腹板高度、钢梁上下翼缘厚度、栓钉直径均可不同程度地影响组合梁的抗弯极限承载力。其中钢梁强度由235 MPa提升至390 MPa时,组合梁极限承载力提升了43.7%,钢梁腹板厚由4 mm提升至16 mm时,组合梁极限承载力提升了40.9%,钢梁腹板高度由360 mm提升至660 mm,组合梁极限承载力提升了50.8%,钢梁翼缘厚度由6 mm提升至12 mm时,组合梁极限承载力提升了32.6%。相比之下,混凝土板厚度及混凝土强度影响较弱。

Analysis on the Influence of Flexural Ultimate Bearing Capacity Parameters of Composite Beams

In order to study the influence of parameters on the ultimate flexural capacity of composite beams,the finite element model was established by using the finite element software ABAQUS.The results show that the strength of steel beam,the thickness of steel beam web,the height of steel beam web,the thickness of upper and lower flange of steel beam and the diameter of studs can affect the ultimate flexural capacity of composite beams in varying degrees.When the strength of steel beam is increased from 235 MPa to 390 MPa,the ultimate bearing capacity of composite beams is increased by 43.7%,and when the thickness of steel beam web is increased from 4 mm to 16 mm,the ultimate bearing capacity of composite beams is increased by 40.9%,the increasing of web height of steel beam from 360 mm to 660 mm results in the increase of ultimate bearing capacity of composite beam by 50.8%,and the ultimate bearing capacity of composite beam is increased by 32.6%when the flange thickness of steel beam is increased from 6 mm to 12 mm.In contrast,the concrete slab thickness and concrete strength have less influence.