钢筋混凝土框架结构基于能量抗震设计方法研究

针对基于能量抗震设计方法在钢筋混凝土（RC）框架结构中的应用进行研究。总结现有能量抗震设计方法研究进展，指出在控制罕遇地震作用下结构耗能机制的基础上确定构件累积滞回耗能需求是落实该方法的关键。通过大量RC框架结构算例的弹塑性分析，提出基于“强柱弱梁”耗能机制下RC框架梁、柱构件累积滞回耗能需求的计算方法，包括：总累积滞回耗能在框架梁和框架柱的分配和沿楼层高度的分布以及在同一楼层的分布。在此基础上，结合梁柱构件的承载力和变形需求，进行梁柱构件的耗能损伤评价，并据此实现基于能量抗震设计。通过1个4层框架结构的算例说明所建议的基于能量抗震设计方法在RC框架结构的具体应用。结果表明，所建议方法的构件耗能需求计算结果与时程分析结果吻合较好，且偏于安全。

Study on energy-based seismic design method of reinforcedconcrete frame structures

The research progress on energy-based seismic design method was reviewed and it was pointed out that the determination of cumulative energy dissipated by structural members based on the control of structural energy dissipation mechanism was the key to the implementation of this method. A large number of reinforced concrete frame structures were analyzed by nonlinear time-history analytical method. Then a procedure to determine the cumulative energy dissipated by different beams and columns of the structure based on the ‘strong column-weak beam’ energy dissipation mechanism was proposed, including the allocation of total dissipated energy between the frame beams and columns, the energy distribution along the structural height and among different structural members in the same story. Therefore, the seismic capacity design of frame beams and columns can be performed based on their dissipated energy demands and plastic deformation demands. The application of the proposed energy-based seismic design method on reinforced concrete frame structures was demonstrated by the design of a 4-story structure example. It is shown that the dissipated energy demand of the designed structure calculated by the proposed method is closed to the results by the time-history method on the safe side.