内置垫板加强T型管节点在平面内弯曲荷载作用下的静力强度研究

利用有限元分析软件ABAQUS对平面内弯曲荷载作用下内置垫板加强T型圆钢管节点的静力强度进行研究.有限元模型的有效性和准确性用T型圆钢管节点的实验结果验证通过之后,运用欧洲规范中提出的在平面内弯曲荷载作用下未加固T型圆钢管节点的承载力计算公式计算了20个未加固的T型圆钢管节点的静力强度,并运用提出的有限元模型计算了相应的320个涵盖不同节点几何参数和垫板几何参数的内置垫板加强的T型圆钢管节点模型的静力强度,对比加固与未加固节点的静力强度,详细分析了垫板几何参数对静力强度的影响和失效模式,结果表明垫板长度参数的改变对加固后的T型圆钢管节点的静力强度的影响不大,垫板厚度参数对静力强度的提高大致成线性影响.

Static Strength of Tubular T-joint with Inner Doubler Plate Reinforcement under In-plane Bending Load

The static strength of tubular T-joint with inner doubler plate reinforcement under in-plane bending load is studied by using finite element analysis software ABAQUS. The validity and accuracy of the finite element model is verified by comparing the numerical results with reported experimental results of circular hollow section tubular T- joints. Thereafter, the static strengths of 20 un-reinforced tubular T-joints and 320 corresponding reinforced T-joints with different geometric parameters are calculated from the equation proposed in Eurocode 3 and the finite element model, respectively. The effect of the inner doubler plate size on the static strength and on the failure mode are an- alyzed in details based on the comparison of the static strength between the un-reinforced and the reinforced T- joints. The results show that the effect of the length of the inner doubler plate on the static strength can be neglec- ted. However, the thickness of the inner doubler plate can increase the static strength approximately in a linear ten- dancy.