弯扭联合作用下钢-混凝土组合箱梁受力特性的试验研究  

Experimental Research on Stress Characteristics of Steel-Concrete Composite Box Beams under Bending-torsion Action

作　　者：张彦玲[1,2] 葛威[1,2] 侯忠明[3] 张德莹[1,2] 

机构地区：[1]石家庄铁道大学土木工程分院,河北石家庄050043 [2]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,河北石家庄050043 [3]北京交通大学土建学院,北京100044

出　　处：《石家庄铁道大学学报（自然科学版）》2012年第4期1-6,共6页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51108281);铁道部科技研究开发计划资助项目(2011G016-C)

摘　　要：以初始弯扭比和剪力连接度为设计参数,进行了6片简支钢-混凝土组合箱梁弯扭受力性能的试验研究,得到了弯扭联合作用下组合箱梁的破坏模式、极限承载力、截面应变分布和钢梁与混凝土板结合面之间的相对滑移规律。试验结果表明:完全连接的组合箱梁主要表现为弯曲破坏或弯扭破坏特征,部分连接的组合箱梁则主要表现为结合面的滑移破坏。扭矩的存在对组合箱梁的极限承载力和极限弯矩并未产生明显影响。在弯扭联合作用下,在组合箱梁结合面上不但产生沿梁轴纵向的相对滑移,其沿截面横向的相对滑移也不容忽视。With the initial torsion-bending ratios and shear connection degrees as the design parameters, six steel-concrete composite box model beams are tested under the bending-torsion couple loads. The failure mode, ultimate bearing capacity, section strain, and interfacial slip of the steel-concrete composite box beams are measured. The test results show that, the fully connected composite beams mainly express bending or bending-torsion failure modes, but the partially connected composite beams are mainly sliding failure modes. The existence of the torque doesn＇ t have great influence on the ultimate bearing capacity and bending moment of the composite box beams. Under the bending-torsion couple loads, there are not only the longitudinal slip between the steel girder and concrete slab of the composite box beam, but also the transverse slip perpendicular to the beam axis.

关 键 词：钢-混凝土组合箱梁 弯扭效应 试验研究 承载力 滑移 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]