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提出了一种新型支撑构件——预压弹簧自恢复耗能支撑(PS-SCEDB),对其构造形式及自恢复原理进行了介绍,并对采用预压弹簧自恢复耗能支撑和普通防屈曲支撑(BRB)的20层Benchmark钢框架结构的抗震性能进行了对比分析.结果表明,在具有不同PGA的3种地震波作用下,与BRB框架结构相比,PS-SCEDB框架结构层间位移角峰值、有效值及基底剪力均减小.此外,PS-SCEDB框架结构残余变形相比原钢框架结构减小了80%,相比BRB框架结构减小了50%,且PS-SCEDB具备良好的耗能能力和自恢复性能.
A new type of support member, prestressed spring self-restoring energy-dissipative support (PS-SCEDB), was introduced. Its structure and self-restoring principle were introduced. The prestressed spring self- (BRB) 20-story Benchmark steel frame structure is compared and analyzed.The results show that compared with the BRB frame structure, the peak displacement of PS-SCEDB frame structure under the action of three kinds of seismic waves with different PGA , The effective value and the substrate shear force decrease.In addition, the PS-SCEDB frame structure residual deformation is reduced by 80% compared with the original steel frame structure, compared with the BRB frame structure reduced by 50%, and the PS-SCEDB has a good Power consumption and self-recovery performance.