铝合金受剪螺栓连接孔壁承压强度

Bearing Strength at Bolt Holes of Aluminum Alloy

摘要:

分析了我国《铝合金结构设计规范》中孔壁承压强度的来源，完成了15个铝合金受剪螺栓连接试验及大量的数值模拟分析.研究结果表明，我国规范给定的孔壁承压强度取值过于保守.根据试验和数值模拟的结果，提出了铝合金受剪螺栓连接的孔壁承压失效准则；基于该准则，分析了螺杆直径、连接板厚度及螺栓孔端距等几何参数对螺栓孔壁承压承载力的影响，推导了孔壁承压强度的计算公式，并验证了其合理性和准确性.

Abstract:

The basic theory and the calculation method of “Code for Design of Aluminum Structures” about the bolts joints against shear force were analyzed. 15 tests of shear bolt connections and numerical simulation studies were carried out. The research results show that the value of bearing strength at bolt holes given by “Code for Design of Aluminum Structures” is too conservative. According to the failure phenomena from the experiments and numerical simulation, the deformation failure criterion was proposed. And based on this criterion, numerical studies on the effect of bolt diameter, plate thickness and end distance on the bearing strength at bolt holes were undertaken, and the calculation formula of bolt bearing strength were derived and verified.