基于 HFWT 体系的钢--混组合梁的承载力试验研究

摘要

基于HFWT体系的钢-混组合梁是一种新型的梁-桁混合体系（ HFWT ）的组合桥梁结构。文章通过设计制作了2片不同厚度的试验梁，通过两点对称静力加载试验测试了试验梁的荷载-挠度关系、交界面处混凝土板与钢梁的相对滑移、桁架应力、跨中截面的应变分布变化，分析了试验梁的破坏形态、变形特点和承载性能。研究结果表明：混凝土板厚大的试验梁其刚度稍大，而且延性更好。%HFWT-based steel-concrete composite beam is a new combined bridge structure of Hybrid Full Web and Truss System.With two test beams of different thickness,the load-deflection relationship,the relative slipping at the interface between the concrete and the steel beam,the truss stress,and the stress distri-bution change in the mid-span cross-section are tested through the two-point symmetrical static loading,and deformation,characteristics and bearing performance of beam are analyzed.The results show that the thicker concrete slab is slightly better in stiffness and ductility.