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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Earthquake-resilient design of base isolated buildings with TMD at basement: Application to a case study
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Earthquake-resilient design of base isolated buildings with TMD at basement: Application to a case study

机译：地下室带TMD的基础隔震建筑的抗震设计：在案例研究中的应用

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摘要

The earthquake-resilient design of a reinforced concrete framed building is presented in this paper as a case study. A non-conventional application of the base isolation in conjunction with a tuned-mass-damper (TMD) located at basement, below the isolation floor, is studied for improving the seismic performance of the building. The seismic base isolation is implemented below the first story, with low-damping rubber isolators mainly placed throughout the perimeter of the building. At the center of the building a large-mass TMD is inserted, which consists of a box filled with large aggregate concrete. The box is located at basement and is connected to the base isolation system via an auxiliary set of lead-core rubber isolators, the latter playing the role of damper and spring elements of the TMD. The TMD box is disconnected from the ground via low-friction flat sliding devices. Optimal design parameters of the auxiliary TMD isolators are detected by minimizing an objective function that is based on the stochastic dynamic analysis of a simplified three-degree-of-freedom system comprising the main structure, the base isolation and the TMD. Four different objective functions are investigated, including the main structure displacement relative to the ground, the interstory displacements, the total acceleration and an energy-based indicator. The effectiveness of this design philosophy and of the related optimization procedure, first time applied to a real case, is demonstrated via nonlinear time-history analyses with simulated accelerograms being consistent with the response spectrum of the installation site. Advantages of this structural system over both the fixed-base building and the conventional application of the base isolation are shown in terms of a variety of response indicators summarizing the seismic performance of the building, including the deformation of the isolators, the displacement demand of the structure, the base shear, the interstory drifts, and the shear forces and bending moments on the beam-column members.
机译：作为案例研究，本文提出了钢筋混凝土框架建筑的抗震设计。为了提高建筑物的抗震性能，研究了基础隔震与位于隔震层下方地下室的调谐质量阻尼器（TMD）的非常规应用。在第一个层级以下实施了地震基础隔离，低阻尼橡胶隔离器主要放置在建筑物的整个周边。在建筑物的中央插入了一个大体积的TMD，它由一个装有大骨料混凝土的盒子组成。该盒子位于地下室，并通过一套辅助的铅芯橡胶隔离器连接到基础隔离系统，后者起到了TMD的阻尼器和弹簧元件的作用。 TMD盒通过低摩擦的平面滑动装置与地面断开连接。通过最小化目标函数来检测辅助TMD隔离器的最佳设计参数，该目标函数基于对简化的三自由度系统的随机动态分析，该系统包括主结构，基础隔离和TMD。研究了四个不同的目标函数，包括相对于地面的主体结构位移，层间位移，总加速度和基于能量的指示器。这种设计原理和相关优化程序的有效性（首次应用于实际案例）是通过非线性时间历史分析和模拟加速度图来证明的，这些加速度图与安装地点的响应谱一致。该结构系统相对于固定基础建筑物和基础隔离的常规应用的优势体现在各种响应指标上，这些响应指标概述了建筑物的抗震性能，包括隔离器的变形，建筑物的位移需求结构，基础剪力，层间位移以及梁柱构件上的剪力和弯矩。

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