To achieve the concept of “strong column and weak beam” and further improve the performance of high strength steel frames, the hybrid strength steel frame with the end-plate joint was proposed in this paper. After verifying the FE modeling method, a total of 22 fine models were built and the parametric analysis was conducted to investigate the influence of eight factors on the initial stiffness, flexural capacity and ductility of the joint. The factors included the parameters of the column, the parameters of the end-plate, the parameters of the bolted connection and the compression ratio. The effectiveness of these factors was determined by the multivariate regression analysis. Then, the component methods provided in EC3 to determine the flexural capacity and initial stiffness were validated. The results indicated that the method for the flexural capacity was reasonable while the method for the initial stiffness showed poor accuracy. The formulas to predict the initial stiffness were modified and were verified.

为实现“强柱弱梁”的概念，进一步提高高强度钢框架的性能，提出了带端板节点的混合强度钢框架。在验证了有限元建模方法之后，共建立了22个精细模型，并进行了参数分析，以研究8个因素对关节的初始刚度，抗弯能力和延性的影响。这些因素包括柱的参数，端板的参数，螺栓连接的参数和压缩比。这些因素的有效性通过多元回归分析确定。然后，验证了EC3中提供的确定抗弯能力和初始刚度的组成方法。结果表明，抗弯承载力方法合理，而初始刚度方法精度较差。修改并验证了用于预测初始刚度的公式。