大型水工渡槽减隔震机理与效应分析  

Vibration-isolating Mechanism of Aqueduct and Effect Analysis

作　　者：陈玲玲[1] 钱胜国[1] 陈敏中[1] 徐德毅[1] 

机构地区：[1]长江科学院爆破与振动研究所,武汉430010

出　　处：《长江科学院院报》2005年第5期70-73,共4页Journal of Changjiang River Scientific Research Institute

摘　　要：渡槽由于槽体及其水体的巨大载荷,地震时,动力反应强烈,按传统抗震设计理论难以保障其安全性。采用简化多质点模型,横槽向按Hosner考虑水体作用结合某渡槽减隔震参数设计,分析研究渡槽隔震机理及效应。控振计算表明,采用减隔震装置是解决渡槽抗震安全的可行措施,适度延长隔震结构周期与调整阻尼是控制渡槽振动的有效途径。并提出,减隔震频率除必须满足低于原结构频率的0.5倍外,还与地震频率有关,同时受到槽内振荡水体晃动频率的制约。For studying the vibration-isolating mechanism of a aqueduct and its effect, the paper presents a simplified multispan multi-masspoint model, which considered the transverse water-body action inside aqueduct with Hosner model and was designed in combination with the damping parameters of some aqueduct. The calculated results show that adopting damping apparatus is a feasible measure for solving aseismic safety of a aqueduct, and that appropriately prolongating period of a vibration-isolationg structure and regulating damping are an effective way of controllong aqueduct vibration. The paper points out vibration-isolating frequency should be less than 0.5 times frequency of original sturucture, meanwhile it must be controlled by the frequency of oscillating waterbody inside the aqueduct caused by earthquake.

关 键 词：渡槽 隔震 多质点系 时程法 减隔震效果 

分 类 号：TV312[水利工程—水工结构工程]