钢筋混凝土框架结构基于性能的塑性设计方法

为预测和控制钢筋混凝土框架结构在罕遇地震作用下的非弹性性能,基于功能平衡原理,提出了一种钢筋混凝土框架结构基于性能的塑性设计方法.该方法预先选定目标侧移和屈服机制,根据功能平衡方程即可得到结构的设计基底剪力;采用塑性设计法设计框架构件和节点,以达到预期的屈服机制和性能.采用此方法对一幢8层钢筋混凝土框架结构进行了设计,并采用动力时程分析法验证了该方法的可行性.研究结果表明,采用基于性能的塑性设计方法设计的钢筋混凝土框架结构最终呈现预期的屈服机构,非弹性性能沿结构高度分布均匀合理. 

Performance-Based Plastic Design Method of Reinforced Concrete Frames

In order to desirably predict and control the inelastic activity of reinforced concrete (RC) frames subjected to severe ground motions, on the basis of energy-work balance a performance-based plastic design (PBPD) method for the design of RC frames was presented. In the PBPD method, the design base shear is obtained based on the energy-work balance and pre-selected target drift and yield mechanism. Plastic design was performed to detail the frame members and connections in order to achieve the targeted yield mechanism and behavior. The method was applied to an eight-storey RC frame and validated by inelastic dynamic analyses. The results indicate that the frames develop desired strong column sway mechanisms, and the story drifts are well within the target values to meet the desired performance objectives.