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Investigation of the seismic response of high-rise buildings supported on tension-resistant elastomeric isolation bearings

机译：抗拉弹性隔震支座对高层建筑地震响应的研究

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In many applications of seismic isolation, such as in high-rise construction, lightweight construction, and structures with large height-to-width aspect ratios, significant tension forces can develop in bearings, raising concerns about the possible rupture of elastomeric bearings and the uplift of sliding bearings. In this paper, a novel tension-resistant lead plug rubber bearing (TLRB) with improved tension-resisting capabilities is developed and experimentally and numerically assessed. This TLRB consists of a common lead plug rubber bearing (LRB) and several helical springs. After describing the theory underlying the behavior of the TLRB, the mechanical properties of reduced-scale prototype bearings are investigated through extensive horizontal and vertical loading tests. The test results indicate that TLRBs can improve the shear stiffness and tension resistance capacity even under significant tensile loads. A series of shaking table tests on scaled models of high-rise buildings with different aspect ratios were conducted to investigate the dynamic performance of the TLRB and the seismic responses of base-isolated high-rise buildings. Three different cases were considered in the shaking table tests: a fixed base condition and the use of TLRB and LRB isolation systems. The results of the shaking table test show that (a) base-isolated systems are effective in reducing the structural responses of high-rise buildings; (b) an isolated structure's aspect ratio is an important factor influencing its dynamic response; (c) TLRBs can endure large tensile stresses and avoid rupture on rubber bearings under strong earthquakes; and (d) the experimental and numerical results of the responses of the models show good agreement. Copyright (C) 2016 John Wiley & Sons, Ltd.
机译：在地震隔离的许多应用中，例如在高层建筑，轻型建筑以及纵横比大的结构中，轴承中会产生很大的拉力，从而引起人们对弹性轴承可能破裂和隆起的担忧。滑动轴承。在本文中，开发了一种具有改进的抗拉能力的新型抗拉铅塞橡胶轴承（TLRB），并通过实验和数值评估。该TLRB由一个普通的铅塞橡胶轴承（LRB）和几个螺旋弹簧组成。在描述了TLRB行为的理论基础之后，通过广泛的水平和垂直载荷测试研究了缩小比例的原型轴承的机械性能。测试结果表明，即使在显着的拉伸载荷下，TLRB仍可以提高剪切刚度和抗拉能力。针对不同纵横比的高层建筑的比例模型进行了一系列振动台测试，以研究TLRB的动态性能以及基础隔震高层建筑的地震响应。振动台测试考虑了三种不同的情况：固定的基本条件以及TLRB和LRB隔离系统的使用。振动台试验的结果表明：（a）隔震系统可有效降低高层建筑的结构响应； （b）隔离结构的纵横比是影响其动态响应的重要因素； （c）TLRB可以承受很大的拉应力，并且可以避免在强烈地震下橡胶轴承破裂； （d）模型响应的实验和数值结果显示出很好的一致性。版权所有（C）2016 John Wiley＆Sons，Ltd.

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