From a yield line model used for calculating RHS-joint strength, a stiffness model is developed for a stepped T-type RHS joint, and a stiffness formulas is established.
在计算节点强度的塑性铰线模型的基础上，建立了不等宽t型方管节点在支杆轴压荷载作用下的刚度模型，推出了刚度简化计算公式。
A thermal elastoplastic contact model which can take into account the effects of temperature-dependent yield strength was developed by using finite element method.
应用有限元方法建立了可考虑屈服应力温度相关效应的粗糙表面热弹塑性接触模型。
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