消能减震结构五种支撑方案优选研究

Study on Optimization of Five Supporting Schemes for Energy Dissipation Structures

以某高度为80m的框架-核心筒结构为对象,研究了五种不同的黏滞阻尼器支撑方案对消能减震结构地震响应及阻尼器耗能的影响。通过验算五种支撑方案的强度、刚度和稳定性,证明了支撑设计的合理性。使用动力时程分析方法,探讨了不同支撑方案对结构楼层剪力、层间位移角、阻尼器耗能状况、结构有效附加阻尼比以及结构框架内力的影响。结果表明,与使用斜杆支撑和人字支撑的结构相比,使用墙体支撑的结构具有更好的减震效果,框架内力更小,此外,墙体支撑布置灵活,有利于满足建筑使用功能要求,是一种既能满足建筑的功能需求又能满足结构设计要求的阻尼器支撑方案,对实际工程具有一定的参考价值。

An 80m-high frame-core tube structure is studied here. The effects of five different viscous damper supports on seismic response of energy dissipation structures and damper energy dissipation are investigated. The rationality of the supporting design is proved by verifying strength, stiffness and stability of the five supporting schemes. The effects of different viscous damper supporton the shear force, the inter-story displacement angle, the energy dissipation of the damper, the additional damping ratio of the structure and the internal force of the structural frame are analyzed by using the dynamic time history analysis. The results show that wall supporting structure has a better damping effect and smaller frame internal forces, compared with diagonal bracing structure and herringbone bracing structure, in addition, the wall support layout is flexible, will help meet the functional requirement for the use of buildings. So the wall support is a damper support program that not only meet the functional requirements of the building structure but also can meet the structural design requirements, it has certain reference value for the actual project.