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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Uncoupled rocking and shear base-mechanisms for resilient reinforced concrete high-rise buildings
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Uncoupled rocking and shear base-mechanisms for resilient reinforced concrete high-rise buildings

机译：用于弹性钢筋混凝土高层建筑的未耦合摇摆和剪切基座机构

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High-rise buildings are an efficient solution to meet the housing challenges of global urbanization that is happening at an incredible pace. Code-based seismic design philosophies are aimed at achieving collapse-prevention under major earthquakes, implying extensive structural damage associated with important losses. A number of high-performance systems have been investigated for enhancing the resilience of high-rise buildings whose design is especially challenging due to higher-mode effects even when a flexural mechanism is formed at the base of the structure. To this end, this paper proposes a new concept consisting of a three-dimensional uncoupled rocking and shear mechanism system for high-rise buildings where reinforced concrete (RC) core walls are used as the lateral-force-resisting system. The proposed system provides a dual-mechanism at the base that independently limits both overturning moments (OTMs) and shear forces and thus more effectively mitigates higher-mode effects. The characteristic mechanics of the proposed system are first studied through an idealized model. A physical embodiment is then designed, detailed, and validated through advanced models and extensive nonlinear dynamic analyses. A 42-story RC core-wall building that is located in Los Angeles and was studied as part of the PEER Tall Buildings Initiative is used as a reference structure in this study. Results confirmed that the proposed system eliminates damage at the base of the walls and minimizes the inelastic demands over the height of the building. In a general sense, the proposed concept provides a framework in which the intended dual mechanism can be implemented to a wider range of high-rise structures.
机译：高层建筑是一个有效的解决方案，以满足全球城市化的住房挑战，这些挑战是以令人难以置信的速度发生的。基于代码的地震设计哲学旨在实现主要地震下的崩溃预防，暗示与重要损失相关的大量结构损害。已经研究了许多高性能系统，以增强高层建筑的韧性，其设计尤其具有挑战性，即使在结构的基部形成弯曲机构时，即使在弯曲机构形成弯曲机构时也是如此。为此，本文提出了一种新的概念，该概念包括用于高层建筑的三维解耦和剪切机制系统，其中钢筋混凝土（RC）芯壁用作横向力抵抗系统。所提出的系统在基座中提供了一种双机构，其独立地限制了翻转时刻（OTMS）和剪切力，从而更有效地减轻更高模式效应。首先通过理想化模型研究所提出的系统的特征力学。然后通过先进模型和广泛的非线性动态分析设计，详细和验证物理实施例。一个42层RC核心墙建筑，位于洛杉矶，并作为同行高层建筑物的一部分进行了研究，该研究用作本研究的参考结构。结果证实，所提出的系统消除了墙壁底部的损坏，并最大限度地减少了建筑物高度的无弹性需求。在一般意义上，所提出的概念提供了一种框架，其中预期的双重机构可以实现为更广泛的高层结构。

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