【摘要】 变电设备在地震中的损毁十分严重,基底隔震技术是提高设备抗震性能的有效途径,而目前变电设备隔震层设计的相关研究较少。为此,首先从变电设备地震破坏的关键原因出发,提出以合理的基底位移响应和加速度响应作为隔振设计目标及其计算方法,经分析后,建议选用新型隔震支座;其次基于IEEE 693需求响应谱,对隔震体系双线性模型进行参数化分析,分析结果验证了等效线性化方法的有效性;最后给出了变电设备隔震初步设计时的参数确定方法。研究表明,可以采用基于IEEE 693需求响应谱的等效线性化方法对隔震层参数进行初步设计,但所得响应结果偏于保守。更多还原

【Abstract】 On-site investigation showed that substation equipment is very vulnerable to severe earthquakes.Due to its special structural configuration and material,base isolation is one of the effitive ways to improve seismic performance.So far the research findings on isolation design for substation equipments are rarely reported.Considering key reasons of equipment seismic damage,two design targets,namely reasonable displacement response and acceleration response at base,are proposed for base isolation and the calculation.New types of isolation device are suggested for substation equipment through qualitative analysis.Moreover,two types of parametric analysis,i.e.,equivalent linear analysis and time history analysis,are performed for bilinear model based on IEEE693 required response spectrum,and the effectivemess of equivalent linearization method is verified by comparing respective calculation results of the two methods.Finally,a preliminary design method is proposed to determine the parameters for base isolation of substation equipments.Results of the research show that the equivalent linearization method based on IEEE693 required response spectrum can be applied to the preliminay design of isolation layer parameters,however the obtained response results tend to conservative.更多还原