钢筋沥青隔震层位移控制研究

发布时间：2018-09-11 13:24

【摘要】：介绍了钢筋沥青隔震层的基本构造和工作原理,利用结构力学知识对钢筋沥青隔震层极限水平位移进行理论分析,推导钢筋沥青隔震层在多遇、罕遇地震作用下其容许位移和二阶效应影响系数的计算公式;探讨钢筋沥青隔震层在不发生第二类失稳破坏时,对隔震竖向钢筋长径比及根数的要求,分析数据并拟合曲线,得到相关关系式。通过对多种工况下的隔震层试件进行振动台试验,研究钢筋沥青隔震层在不同隔震竖向钢筋直径和不同加速度幅值输入时的隔震层相对位移及动力特性。结果表明:理论分析与试验结果比较吻合,验证了钢筋沥青隔震层在多遇、罕遇地震作用下其容许位移的计算公式、二阶效应影响系数的计算公式和隔震竖向钢筋长径比与根数的关系式的可靠性。
[Abstract]:The basic structure and working principle of reinforced asphalt isolation layer are introduced. The limit horizontal displacement of reinforced asphalt isolation layer is theoretically analyzed by using structural mechanics knowledge, and the frequent occurrence of reinforced asphalt isolation layer is deduced. The formulas for calculating the allowable displacement and the influence coefficient of second-order effect under rare earthquake are discussed, and the requirements for the ratio of length to diameter and root number of the isolated vertical steel bar in the reinforced asphalt isolation layer without the second kind of unstable failure are discussed, and the data are analyzed and the curve is fitted. The correlation relation is obtained. The relative displacement and dynamic characteristics of the isolation layer of reinforced asphalt isolation layer with different vertical reinforcement diameter and different acceleration amplitudes were studied by shaking table test. The results show that the theoretical analysis is in good agreement with the experimental results, and the formula for calculating the allowable displacement of reinforced asphalt isolation layer under the action of frequent and rare earthquakes is verified. The formula for calculating the influence coefficient of the second order effect and the reliability of the relationship between the ratio of length to diameter of vertical reinforcement and the number of roots are obtained.
【作者单位】：湖南大学;
【基金】：国家十二五科技支撑项目(2011BAJ08B02) 湖南省重点项目(06sk4057)
【分类号】：TU352.12

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