超长复杂基础隔震结构静动力特性温度相关性研究

发布时间：2018-03-25 18:32

本文选题：基础隔震结构　切入点：结构健康监测　出处：《工程力学》2017年07期

【摘要】：环境温度变化会引起超长基础隔震结构响应与动力特性发生改变。基于某超长复杂基础隔震结构健康监测系统实测的隔震层温度、隔震支座水平位移及上部结构加速度响应数据,分析了环境温度对隔震支座水平位移及结构动力特性的影响规律。首先,从理论上分析了温度对隔震支座水平位移的影响机理,并对隔震层温度与隔震支座水平位移进行了相关性分析。同时,对环境温度对基础隔震结构动力特性的影响机理进行了理论分析,并结合隔震支座温度相关性试验结果,对结构动力特性与环境温度的相关性分析结果进行了验证。结果表明,环境温度与隔震支座水平位移具有较强相关性;环境温度与隔震结构动力特性的相关性分析结果与隔震支座温度相关性试验所得到的结果具有较好的一致性;最后,通过参数回归分析,给出了超长复杂基础隔震结构隔震支座水平位移、模态频率的温度相关性模型,并给出了温度对超长复杂基础隔震结构模态频率的影响系数曲线,为准确、合理评估隔震结构的性能状态提供依据。
[Abstract]:The change of environmental temperature will cause long response of base isolated structure and dynamic characteristics change. The isolation layer measured temperature of health monitoring system of a long complex base isolation structure, the response data bearing horizontal displacement and acceleration of superstructure, analyzes the influence of environmental temperature on the bearings of horizontal displacement and the dynamic characteristics of the structure. First, the mechanism of temperature influence on the horizontal displacement of isolation bearing was analyzed theoretically, and the temperature and bearing horizontal displacement of isolation were analyzed. At the same time, the mechanism of influence of environmental temperature on the basis of vibration and dynamic characteristics of the structure are analyzed, and combined with the bearing temperature dependence of the test results, the correlation analysis on the dynamic characteristics of the structure and the ambient temperature results were verified. The results show that the temperature and the horizontal displacement of isolation bearing environment with strong phase Correlation; get the results of correlation analysis of environmental temperature and isolation structure dynamic characteristics and bearing temperature correlation test results have good consistency; finally, through regression analysis, given the long complex isolation bearing horizontal displacement of foundation, temperature correlation model of modal frequency, and gives the temperature on the long and complex coefficient effect of modal frequency curve, isolated structure based accurate and reasonable assessment provides the basis for the performance state of isolation structure.

【作者单位】：兰州理工大学甘肃省土木工程防灾减灾重点实验室;兰州理工大学防震减灾研究所;兰州理工大学西部土木工程防灾减灾教育部工程研究中心;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家自然科学基金项目(51578274,51178211,51568041)
【分类号】：TU352.12;TU435

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