部分充填式钢箱–混凝土组合连续梁竖向抗剪试验研究

Vertical Shear Test on Partially Filled Steel Box-Concrete Composite Continuous Girder

钢–混凝土组合结构因其轻质高强、施工方便等特点得到了广泛的运用,提出一种新型部分充填式钢箱–混凝土组合连续梁。为了分析组合连续梁的中支座在负弯矩作用下的受力全过程特征、延性、截面刚度变化及竖向抗剪强度,对两根不同中支座混凝土充填形式连续梁试件进行抗剪试验研究。试验结果表明:充填的核心混凝土对钢箱腹板抗局部屈曲能力的提高和承担抗剪起到了重要作用。

Steel-concrete composite structure has been widely used because of its light weight,high strength and convenient construction.A new type of partially filled steel box-concrete composite continuous beam was proposed.In order to analyze the characteristics of the whole process of stress,ductility,change of section stiffness,and vertical shear strength of the mid-support of composite continuous beam under negative bending moment,the resistance of two continuous beam specimens with different types of concrete support in the middle support is tested.Shear test study.The test results Show that the filled core concrete plays an important role in improving the local buckling resistance of the steel box web and in assuming shear resistance.