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复杂火电厂主厂房结构减隔震体系抗震性能评估
尹业先1 , 王健泽2 , 周裕洲2 , 戴靠山2 , 查军龙2
摘 要

(1 山东电力建设第三工程有限公司, 青岛 266100; 2 四川大学土木工程系, 成都 610065)

摘要: 电力工业结构是重要的基础设施之一。 受生产工艺的影响,火力发电厂主厂房存在结构布置复杂与不规则的特点。 为了提高火电厂主厂房结构的抗震性能,减小地震灾害下因发电生产中断造成的直接和间接损失,基于一实际火电厂主厂房结构,发展了减隔震结构体系。 主要对重型煤斗设备进行了隔震处理,并配合使用附加防屈曲支撑与金属软钢阻尼器。 对该火电厂主厂房的原抗震结构体系与减隔震结构体系进行有限元建模,对用于模拟钢支撑、隔震支座及附加消能装置的单元参数经试验结果进行校正取值。 选择 15 组天然地震动,对两个结构体系的数值模型开展动力时程分析,分别从单个时程工况下结构损伤情况、设防地震强度下结构层间位移角分布均值、结构地震易损性三个方面对比抗震结构体系与减隔震结构体系的抗震性能。 结果表明,发展的减隔震结构体系有效保护了主体结构不受损坏,层间位移角响应沿高度分布更为均匀,且三个性能水准下的抗力中位值提高至原抗震结构体系的 1􀆰 4~ 2 倍。

关键词: 火电厂; 煤斗隔震; 消能减震; 抗震性能; 易损性

中图分类号:TU355 文献标志码:A 文章编号:1002⁃848X(2022)14⁃0085⁃07

 

DOI:10􀆰 19701 / j􀆰 jzjg􀆰 20201262

 

Seismic performance evaluation for a complex thermal power plant building using isolation and

supplemental damping systems

YIN Yexian1, WANG Jianze2, ZHOU Yuzhou2, DAI Kaoshan2, ZHA Junlong2

(1 SEPCOIII Electric Power Construction Corporation, Qingdao 266100, China;2 Department of Civil Engineering, Sichuan University, Chengdu 610065, China)

Abstract: The structure of electric power industry is one of the important infrastructures. Due to the constraints byoperational practice, the thermal power plant buildings are featured with complexity and irregularity. With the purpose ofimproving the seismic performance of the thermal power plant buildings and reducing the direct and indirect seismic loss,the seismic resilient system was developed based on a real thermal power plant building. Isolation technique was used forthe heavy coal bunkers housed in the building. Also, buckling⁃restrained braces and yielding steel panel damper wereconsidered. The numerical models for the seismic resilient system and the conventional seismic system were established.The parameter values for modeling steel braces, isolators, dampers were verified by testing results. A total of 15 pairs ofground motions were selected and response⁃history analyses were performed. The seismic performances of the seismicresilient system and the conventional seismic system were compared from three aspects: the structural damage under a singletime⁃history condition, the mean value of the story drift profile distribution under the fortified seismic intensity, and thestructural seismic fragility. The results show that the adopted passive control techniques protected the structure. The storydrift profiles along major axis of the structure are more uniform than the conventional building system. Moreover, themedian seismic capacities of the seismic resilient system are up to 1􀆰 4~ 2􀆰 0 times the capacities of the conventional system.

Keywords: thermal power plant; coal bunker isolation; supplemental damping system; seismic performance;seismic fragility

∗国家自然科学基金 (U1710111 & 51878426), 中国电力建设股份有限公司科研项目(KJ⁃2016⁃095)。
第一作者:尹业先,学士,高级工程师,主要从事电力土建施工技术与管理,Email: yinyexian@ sepco3. com。
通信作者:戴靠山,博士,教授,主要从事工程结构抗震研究,Email: kdai@ scu. edu. cn。
 
[引用本文] 尹业先,王健泽,周裕洲,等. 复杂火电厂主厂房结构减隔震体系抗震性能评估[J]. 建筑结构,2022,52(14):85⁃91. YIN Yexian,WANG Jianze,ZHOU Yuzhou,et al. Seismic performance evaluation for a complex thermalpower plant building using isolation and supplemental damping systems[J]. Building Structure,2022,52(14):85⁃91.
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