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(1 中国电力工程顾问集团中南电力设计院有限公司, 武汉 430071;2 国家电网有限公司, 北京 100031)
[摘要]张北可再生能源柔性直流阀厅采用钢排架柱作为承重构件,结构抗侧力构件可选择普通支撑或屈曲约束支撑。通过对防屈曲支撑方案、普通支撑方案1、普通支撑方案2在多遇及罕遇地震作用下的时程分析得出位移、塑性铰分布等不同的结构地震作用响应结果。结果表明,防屈曲支撑在为结构提供附加刚度、耗能减震的同时取得良好的经济效益; 同时根据电力系统的特殊功能性要求对国家重点工程张北项目的电气设备和厂房结构在地震下的基本性能目标提出建议。
[关键词]电力系统; 屈曲约束支撑; 普通支撑; 消能减震
中图分类号:TU318文献标识码:A文章编号:1002-848X(2020)23-0108-06
Application of performance-based design for energy dissipation and seismic reduction in large electric power structures
CHEN Yin1, DU Xiaolei2, XIA Zhengdong1
(1 Central Southern China Electric Power Design Institute Co., Ltd., of China Power Engineering Consulting Group, Wuhan 430071, China; 2 State Grid Corporation of China, Beijing 100031, China)
Abstract:The Zhangbei Renewable Energy flexible DC valve hall adopts steel bent column as the main load-bearing member. The lateral resistance member of the structures can choose ordinary braces or buckling-restrained braces. Through time history analysis of buckling-restrained braces, ordinary support plan 1 and ordinary support plan 2 under frequent and rare earthquakes, different structural seismic response results such as displacement and plastic hinge distribution were obtaine. The results show that the buckling-restrained braces provide additional rigidity and energy dissipation and seismic reduction for the structure while having achieved economic benefits. At the same time, according to the special functional requirements of the electrical power system, suggestions are proposed on the basic performance objectives of the national key project Zhangbei project for electrical equipment and plant structures under earthquakes.
Keywords:electric power system; buckling-restrained brace; ordinary brace; energy dissipation and seismic reduction
*国网公司总部科技项目《北京换流站柔直阀厅减震及交流配电装置楼隔震研究》(SGZB0000JSJS1800791)。
作者简介:陈寅,博士,高级工程师,Email:chenyin@csepdi.com; 通信作者:夏正东,学士,工程师,Email:xiazhengdong@csepdi.com。