黏滞阻尼器减震框架结构保持正常使用功能的设计要求探讨

Discussion on design requirements to maintain normal functionality for energy dissipation frame structure using viscous dampers

《建设工程抗震管理条例》要求两区八类建筑需采用减隔震技术,并保证设防地震时能够满足正常使用要求。目前针对减震结构满足正常使用功能的设计方法尚未达成共识。RISN-TG 046—2023《基于保持建筑正常使用功能的抗震技术导则》等新编标准针对减震结构提出了系统的基于性能的设计要求。基于一个8层RC框架采用黏滞阻尼器的减震结构案例,按照该标准及其他现行标准的不同要求进行了减震设计,对比了不同设计方案的土建成本及地震响应,并对减震结构的剪力、位移角和构件损伤进行了讨论,结果表明,在进行减震结构设计时,建议按照RISN-TG 046—2023《基于保持建筑正常使用功能的抗震技术导则》要求控制设防地震下的层间位移角,可按照DGJ 08-9—2013《建筑抗震设计规程》或JGJ 3—2010《高层建筑混凝土结构技术规程》或GB 50011—2010《建筑抗震设计规范》控制承载力,为减震结构保持设防地震下正常使用功能的设计提供参考。

The Regulations on the Administration of Earthquake Resistance in Construction Projects requires eight types of buildings located in the two areas to adopt energy dissipation or seismic isolation technology,and to ensure that they can maintain normal functionality under design basis earthquakes.At present,there is no consensus on the design method for the energy-dissipated structures to meet the requirement of maintaining functionality.The standards such as the Guideline for Seismic Technology to Maintain Functionality of Buildings in Earthquakes(RISN-TG 046—2023)have put forward systematic performance-based design requirements.Based on the case of an 8-story concrete frame with viscous dampers,this paper conducts energy dissipation design according to this guideline and other current design codes.The civil construction cost and seismic responses of different design schemes are compared.The seismic responses are discussed in terms of interstory drift,story shear force and component damage states.Based on the results,it is suggested to control the interstory drift under design basis earthquake according to the requirements of Guideline for Seismic Technology to Maintain Functionality of Buildings in Earthquakes(RISN-TG 046—2023)when designing energy dissipation structures.The strength of structural components can be determined according to the Code for Seismic Design of Buildings(DGJ 08-9-2013)or the Technical Specification for Concrete Structures of Tall Building(JGJ 3—2010)(or the Code for Seismic Design of Buildings(GB 50011—2010)).This paper provides a reference for the energy-dissipated structures to satisfy the design requirements of maintaining normal functionality under design basis earthquake.