基于能量抗震设计方法研究及其在钢支撑框架结构中的应用

介绍了作者近年来关于基于能量抗震设计方法的研究工作。首先，说明了基于能量抗震设计与传统抗震设计方法的关系，指出合理的结构损伤耗能机制控制是实现基于能量抗震设计前提，并据此提出了基于能量抗震设计的框架。随后，介绍了基于能量抗震设计用能量谱，包括单自由度（SDOF）体系总输入能量E _I谱、SDOF体系累积滞回耗能比E_H/E_I谱以及多自由度（MDOF）体系E _I,_MDOF谱与SDOF体系E _I谱的关系，并基于这些谱关系给出了MDOF体系的总累积滞回耗能E_H的确定方法。在此基础上，基于静力弹塑性分析方法给出了结构预期损伤部位累积滞回耗能E_H需求的确定方法，据此结合构件的承载力和变形需求，进行构件层次的基于能量抗震设计。最后，针对某钢支撑框架结构，介绍了所建议的基于能量抗震设计方法的应用。

Study on energy-based application on steel seismic design method and braced frame structures

The research progress on the energy-based seismic design methodology by authors in recent years is presented. Firstly, the relation between energy-based seismic design methodology and traditional seismic design method is discussed. This work points out that a critical condition to realize an energy-based seismic design is that the structure should have a rational damage/energy-dissipation mechanism. Based on this condition, a framework of energy-based seismic design is proposed. Secondly, the energy spectra for energy-based seismic design, including the spectral input energy E_I ,cumulative hysteresis energy ratio E_H/E_I for single-degree-of-freedom (SDOF) system, and the relations between energy spectra of SDOF and MDOF systems are briefly introduced. According to the energy spectra, the method to determine the total dissipated energy E_H is proposed, which further leads to the method to calculate the dissipated energyE_H at the desired positions by using MPA. Therefore, the seismic design of structural elements can be performed based on the elemental dissipated energyE_H , the strength demands and the deformation demands. Finally, the application of the proposed energy-based seismic design methodology is demonstrated by the seismic design of a steel braced frame.