Shaking table test and analysis method on ultimate behavior of slender base‐isolated structure supported by laminated rubber bearings
Shaking table test and analysis method on ultimate behavior of slender base‐isolated structure supported by laminated rubber bearings
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DOI：
10.1002/eqe.1048
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发表时间：
2011-04
影响因子：
4.5
通讯作者：
E. Takaoka;Y. Takenaka;A. Nimura
中科院分区：
文献类型：
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作者：
E. Takaoka;Y. Takenaka;A. Nimura
本文描述了用于确定细长基础隔震建筑物极限性能的振动台试验结果，并提出了一种时程响应分析方法，可以预测由板式橡胶支座屈曲断裂引起的基础隔震建筑物的极限性能。在测试中，使用了由四个铅橡胶支座支撑的重192 kN的基础隔震结构模型。实验参数是轴承之间的高度与距离的长宽比以及轴承的形状和轴向应力。试验结果表明，大输入水平下上部结构的运动类型可分为下沉式、下沉式三种类型。隆起类型；和混合型。这些行为取决于上部结构的静态极限横向举升力与基础隔震层的横向恢复特性之间的关系。在该分析方法中，轴承特性由通过在现有模型中添加轴向弹簧而扩展的宏观力学模型来表示。非线性弹簧特性用于其旋转、剪切和轴向弹簧。应用中心差分法求解运动方程。为了验证该方法的有效性，进行了振动台试验的仿真分析。分析结果与测试结果吻合较好。所提出的模型可以表达轴承在大变形范围内的屈曲行为。版权所有 © 2010 约翰威利父子有限公司
This paper describes the results of shaking table tests to ascertain the ultimate behavior of slender base‐isolated buildings and proposes a time history response analysis method, which can predict the ultimate behavior of base‐isolated buildings caused by buckling fracture in laminated rubber bearings. In the tests, a base‐isolated structure model weighing 192 kN supported by four lead rubber bearings is used. The experimental parameters are the aspect ratio of height‐to‐distance between the bearings and the shape of and the axial stress on the bearings. The test results indicate that the motion types of the superstructure at large input levels can be classified into three types: the sinking type; the uplift type; and the mixed type. These behaviors depend on the relationship between the static ultimate lateral uplifting force on the superstructure and the lateral restoring characteristics of the base‐isolated story. In the analysis method, bearing characteristics are represented by a macroscopic mechanical model that is expanded by adding an axial spring to an existing model. Nonlinear spring characteristics are used for its rotational, shear, and axial spring. The central difference method is applied to solve the equation of motion. To verify the validity of the method, simulation analysis of the shaking table tests are carried out. The results of the analysis agree well with the test results. The proposed model can express the buckling behavior of bearings in the large deformation range. Copyright © 2010 John Wiley & Sons, Ltd.