本项目研制一种新型预压弹簧自恢复耗能支撑构件，通过数值模拟及拟静力试验研究自恢复耗能支撑构件耗能能力、复位能力及设计参数对其性能的影响规律，建立支撑构件恢复力模型及其设计理论与方法；通过自恢复耗能支撑-框架局部子结构精细化数值模拟和拟静力试验研究子结构受力性能及局部损伤分布规律、支撑构件耗能能力及子结构复位能力，揭示支撑-框架子结构失效机制；基于多尺度建模方法研究高层建筑自恢复耗能支撑体系的抗震性能及功能可恢复性，建立自恢复耗能支撑系统与高层建筑结构一体化设计的理论与方法，对提高我国高层建筑的抗震能力提供理论依据和科学支撑，具有重大的科学意义和广泛的应用前景。

A new type of pre-pressed spring self-centering energy dissipation brace (PS-SCED) member is proposed in this project, studies of the energy dissipation capacity, the self-centering performance, and the effects of design parameters on the dynamic behaviors of PS-SCED members are carried out through simulation and quasi-static tests of members to further establish the restoring force model and design theory and methods of this bracing member. Through the refinement simulation and quasi-static tests of self-centering energy dissipation brace-frame substructures, the mechanical behaviors and local damage distribution, the energy dissipation capacity of bracing members and the self-centering capability of substructure are studied to reveal the failure mechanism of substructures. Based on the multi-scale simulation theories, the seismic performance and function recoverability of high-rise building self-centering energy dissipation bracing structure are researched to further estabilish the theory and method of design and analysis integration for self-centering energy dissipation bracing system and high-rise building structures. Results of this research will provide a solid theoretical foundation and techinical support for improving seismic capacity of high-rise building, therefore, this project is of great theoretical significance and engineering value.