重型高位储仓设备隔震优化设计方法有效性研究  

Effectiveness of optimal design approaches for isolation system specific for heavy storage silos

作　　者：黄勤勇 王健泽 李德生 戴靠山 Huang Qin-yong;Wang Jian-ze;Li De-sheng;Dai Kao-shan(Department of Civil Engineering,Sichuan University,Chengdu 610065,China;MOE Key Laboratory of Deep Underground Science and Engineering,Chengdu 610065,China;Failure Mechanics&Engineering Disaster Prevention and Mitigation,Key Laboratory of Sichuan Province,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学土木工程系,四川成都610065 [2]深地科学与工程教育部重点实验室,四川成都610065 [3]破坏力学与防灾减灾四川省重点实验室,四川成都610065

出　　处：《工程抗震与加固改造》2022年第5期126-135,142,共11页Earthquake Resistant Engineering and Retrofitting

摘　　要：以工业高位重型储仓设计为非经典调谐质量吸能器(TMD)为导向,研究了既有TMD理论在高位重型储仓隔震优化设计中的适用性问题,提出了一种考虑阻尼比限值与地震动特性的优化设计方法。计算表明,附加阻尼比设计目标限值放宽到0.1以后,该方法设计结果更接近工程实际。重型工业高位储仓的隔震设计主要有调谐质量减震与周期延长两个思路。本文采用一实际火电工业结构煤仓间部分为研究对象,分别采用天然橡胶支座与铅芯橡胶支座对高位煤斗设备进行隔震设计,研究2种设计思路对结构的减隔震效果。结果表明,重型储仓隔震设计中首要考虑因素是调谐减震。在最优减震区段内,调谐减震与耗能减震的贡献之比约为1.93:1,相比采用天然橡胶支座且仅考虑调谐作用的隔震设计,采用铅芯橡胶支座可提供滞回耗能以改善调谐减震的鲁棒性较弱的问题。In this paper, with the aim of designing industrial heavy storage silos as non-classical tuned mass damper(TMD),the effectiveness of the existing TMD-based optimal design approaches is studied. An optimal design method accounting for the limited damping ratio and ground motion characteristics is proposed. The analysis results show that the optimal design method could produce the scheme closer to the engineering practice. There are two concepts making the isolation design for heavy industrial storage silos effective and one is based on turned mass damper and the other is based on elongated natural period. In this paper, the coal silo of an actual thermal power industrial structure is taken to be studied. Natural rubber bearing and lead rubber bearing are used to design the isolation of high coal bucket equipment, and the resulting seismic performance based on the two design concepts on the structure is studied. The results show that tuned damping effect is the primary influential factor for the seismic performance of the heavy storage silo isolation system. In the optimal damping region, the ratio of energy dissipation contribution by the tuned damping effect to the effect of elongated natural period is about 1.93:1. Compared with the isolation design using natural rubber bearing and only considering tuned damping effect, the design using lead rubber bearing can provide hysteretic energy dissipation to improve the robustness of the heavy silo isolation system.

关 键 词：工业建筑结构 重型储仓 调谐质量阻尼器 设备隔震 优化设计 

分 类 号：TU352.12[建筑科学—结构工程]