大型冷却塔倒塌致地面振动影响因素  

Factors affecting the ground vibration caused by the collapse of a super large cooling tower

作　　者：刘敏 陈兵 林峰[2] 闫辉峰[2] 顾祥林[2] 

机构地区：[1]中国核电工程有限公司,北京100840 [2]同济大学土木工程学院,上海200092

出　　处：《振动与冲击》2016年第10期126-132,共7页Journal of Vibration and Shock

基　　金：国家高技术研究发展计划资助(2012AA050903)

摘　　要：内陆核电厂中大型冷却塔倒塌可引起地面振动和碎片冲击,危害核设施的安全运行。进行冷却塔倒塌致地面振动及影响因素分析。首先,建立经验证的"冷却塔-土体"数值模型预测地面振动。其次,研究影响地面振动的关键因素,包括塔型、不同偶然荷载引起的倒塌形态、以及场地土性质。结果表明,场地土的软硬是影响振动的最关键因素,倒塌形态和塔型影响次之。最后,基于分析结果给出考虑倒塌致次生灾害的内陆核电厂规划建议,包括冷却塔和核岛的间距确定方法、冷却塔倒塌模式控制、以及土层减振措施。The structural collapse of super large cooling towers located in inland nuclear power plants will induce ground vibration and fragments impact,which can detrimentally affect the safe operation of nuclear-related facilities.To prevent and mitigate these secondary hazards,the collapse induced ground vibration was predicted and the influencing factors were studied.A verified “cooling tower-soil”numerical model was built to predict the ground vibration.Then the critical factors which influence the ground vibration were numerically investigated,including tower types,collapse modes and soil properties.The results show that the soil property is the most critical factor.The obtained understanding was finally applied in nuclear power plant planning.Recommendations were proposed,including the method to determine the spacing between cooling tower and nuclear island,the control of collapse modes of cooling tower,and measures for soil vibration attenuation.

关 键 词：冷却塔 倒塌 数值模拟 地面振动 

分 类 号：TU435[建筑科学—岩土工程]