钢-混凝土连续组合箱梁负弯矩区滑移分析

Analysis of slip in negative bending moments of continuous steel-concrete composite box girder

以钢-混凝土组合梁试件为研究对象,基于栓钉非线性剪切变形的有限元参数分析和隔板受力分析,对箱形截面组合梁两部分栓钉的剪切变形进行了研究。研究结果表明:钢-混凝土组合箱梁水平抗剪承载力由腹板翼缘栓钉提供,设置隔板翼缘栓钉不能提高组合梁剪力连接程度,取消隔板翼缘栓钉可缓解隔板受力。研究结果可为减少隔板加劲肋提供理论依据。

Based on the finite element analysis of the nonlinear shear deformation of the studs and the stress analysis of the partition,the shear deformation of the studs in two parts of the steel-concrete com‐posite beam with box section is studied.The results show that the horizontal shear capacity of steel concrete composite box girder is provided by web flange bolts.The installation of baffle flange bolts cannot improve the shear connection degree of composite beams.Removing the flange stud of the dia‐phragm can relieve the force on the diaphragm.The aboved conclusion provide a theoretical basis for reducing the stiffener of the diaphragm.