钢-混凝土组合梁的抗扭特点

钢-混凝土组合梁能充分发挥混凝土抗压强度高、钢材抗拉性能好的优势,近年来,在我国已得到了越来越广泛的应用。相比抗弯曲性能,目前对组合梁扭转性能的研究还很少。然而,在建筑及桥梁结构中,组合梁受扭转作用是不少的。本文介绍了开口截面组合梁和箱形组合梁的极限抗扭特点及已有的研究成果,并指出了需要进一步研究的问题。

Torsional Characteristics of Steel-Concrete Composite Beams

Composite steel-concrete beams combine the high-strength performance of structural steel with the stiffness and compressive strength inherent in concrete. As each material can be used to its best advantage, composite beams show economy in overall cost and are fast to construct. For these reasons they have become increasing popular. In buildings and bridges composite beams sometime are subjected to torsion. However, insufficient research has been done in this field. This paper presents the progress in research on the torsional characteristics of steel-concrete composite beams with open sections and composite box girders, and indicates some problems needed to be further studied.