高温下矩形空心截面构件侧面的刚度研究

半刚性节点是设计规范中一个重要的新课题,对于分析节点属性,组件法是最重要的理论方法。研究这种方法的改进措施,选取高温条件下的矩形空心截面构件进行分析。对组件的描述是组件法的主要步骤,欧洲规范要求计算节点每个组件的强度和刚度。在常温和高温下,对受压下矩形空心截面构件侧面的刚度进行试验研究和数值研究。最后,用试验数据验证受压下矩形空心截面构件侧面刚度方程的有效性。

Stiffness of the Component ’Lateral Faces of RHS’ at High Temperature

The study of semi-rigid joints is one of the main new subjects that have been included in the design codes.In this field,the component method can be considered the most important theoretical approach for the evaluation of the properties of joints.The extension of this method to new fields of application is the aimed objective of this paper and the selected new subjects for this purpose are the consideration of rectangular hollow sections(RHS) and high temperature conditions.In this way,the component characterization is one of the main steps of the component method,and the Eurocode approach requires the calculation of both resistance and stiffness of each one of the component parts in which the whole joint can be divided.In this paper,the stiffness of the component ‘lateral faces of RHS under compression’ was selected to be studied at ambient and high temperature through experimental and numerical research.Finally,these tests were used to check the validity of a new analytical equation for the stiffness of the component ‘lateral faces of RHS under compression’.