型钢混凝土结构的粘结强度研究

型钢混凝土结构的粘结强度研究

摘要: 本文在分析型钢混凝土粘结滑移机理和影响型钢混凝土粘结性能的各种因素的基础上，采用有限元结构分析软件ANSYS分析了混凝土强度等级、混凝土保护层厚度、横向配箍率和纵向配筋率等因素对型钢混凝土粘结强度的影响，研究结果表明：混凝土强度等级对型钢混凝土粘结强度影响很大，混凝土保护层厚度、横向配箍率和纵向配筋率对粘结极限破坏荷载提高作用不明显。

关键词: 型钢混凝土结构；粘结强度；受力性能；有限元分析

Study on the Bond-strength of Steel Reinforced Concrete Structures

Liang yonggan

(New World Development (wuhan),LTD.Wuhan430022China)

Abstract: Based on studying on the bond-slip relation of steel reinforced concrete structures and the factors which influence the bond-strength of the Steel reinforced concrete structure(SRC), this paper has studied the four main bond-anchoring factors such as concrete strength, concrete cover thickness, the ratio of steel bar and the transverse hoops with structural analysis software ANSYS. The results show that: the concrete strength has a great impact on the bond-strength of the SRC. But the concrete cover thickness, the ratio of steel bar and the transverse hoops have little impact on increasing the bond-ultimate failure load.

Key words: steel reinforced concrete (SRC); bond strength; mechanical behavior ; finite element analysis

1 引言

型钢混凝土构件充分利用混凝土的抗压性能和钢材的抗拉压性能，混凝土与型钢共同受力，使得结构承载力高、抗震和抗火性能好、造价适中，因而在高层与超高层建筑、大跨度公共建筑中得到广泛的应用。型钢与混凝土之间的粘结性能是直接影响型钢混凝土结构和构件的受力性能、破坏形态、计算假定、承载能力、裂缝和变形的主要因素[1-3]。本文在分析型钢混凝土粘结滑移机理的基础上，采用结构分析软件ANSYS对型钢混凝土的粘结强度进行研究。

2 型钢混凝土粘结滑移机理分析