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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Seismic collision potential of adjacent base-isolated buildings with corridor bridges subjected to bidirectional near-fault pulse-like ground motions
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Seismic collision potential of adjacent base-isolated buildings with corridor bridges subjected to bidirectional near-fault pulse-like ground motions

机译：邻近基座隔离建筑物的地震碰撞潜力，走廊桥经受双向近故障脉冲地面运动的

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摘要

Adjacent base-isolated buildings with corridor bridges have a large seismic displacement demand in their isolation layer, and therefore are prone to collision. Moreover, seismic wave incidence angles may have a great impact on their seismic collision response, especially for near-fault ground motions that may exhibit strong directionality dependence. This paper studies the impact of seismic wave incidence angle and near-fault pulse effect on seismic collision potential of adjacent buildings connected by corridor bridges, retrofitted with base isolation. Two adjacent-building systems are established in OpenSees to facilitate analyses. One is a base-isolated (BI) building system adopted as the baseline model, each building of which consists of lead-rubber bearings (LRB) and ordinary-rubber bearings (LNR). The other one is a base-isolation-with-damper (BID) system, where two additional groups of viscous dampers were added to the isolation layers of BI system. The first group of dampers is used to connect the buildings in order to reduce their out-of-phase motion. The second group of dampers is placed at the base of individual buildings to dissipate seismic energy. The effectiveness of using the dampers of the BID results against the BI baselines was compared. A collision potential index D was proposed to quantify the collision potential of the adjacent base-isolated buildings. The research shows that, the seismic wave incidence angle has a great influence on the building collision potential, which does not necessarily be greatest in the maximum pulse direction. Using dampers may not be useful for reducing building deformation demands, but can effectively coordinate the asynchronous movement of adjacent buildings, reducing the potential of seismic collision. Finally, the Pseudo-Spectral Acceleration (PSA) based on the isolation periods of the buildings was shown to correlate well with the index D, which can be used as the pair of seismic Intensity Measure (IM) and Engineering Demand Parameter (EDP) to describe the collision potential between adjacent base-isolated buildings with corridor bridges.
机译：具有走廊桥的相邻的基座建筑物在其隔离层中具有大的地震位移需求，因此容易碰撞。此外，地震波入射角可能对其地震碰撞响应产生很大影响，特别是对于可能表现出强烈的方向性依赖性的近断层地运动。本文研究了地震波入射角和近故障脉冲效应对走廊桥梁连接的相邻建筑物的地震碰撞电位的影响，改装了基础隔离。在Opensees中建立了两个相邻的建筑系统，以便于分析。一个是作为基线模型采用的基本隔离（BI）建筑系统，每个建筑物由铅橡胶轴承（LRB）和普通橡胶轴承（LNR）组成。另一个是与阻尼器（BID）系统的基准隔离（BID）系统，其中将另外两组粘性阻尼器添加到BI系统的隔离层中。第一组阻尼器用于连接建筑物，以减少其外运动运动。第二组阻尼器被放置在各个建筑物的基础上以消散地震能量。比较了使用BID结果对BI基线的衰减器的有效性。提出了一种碰撞潜在指标D来量化相邻基座隔离建筑物的碰撞电位。研究表明，地震波入射角对建筑碰撞电位产生了很大影响，这在最大脉冲方向上不一定是最大的。使用阻尼器可能对降低建筑物变形需求可能不有用，而是可以有效地协调相邻建筑物的异步运动，从而降低地震碰撞的潜力。最后，基于建筑物的隔离周期的伪光谱加速度（PSA）与指数D相互作用，其可以用作一对地震强度测量（IM）和工程需求参数（EDP）。用走廊桥描述相邻基座隔离建筑物之间的碰撞电位。

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  • 来源
    《Soil Dynamics and Earthquake Engineering》 |2020年第8期|106202.1-106202.13|共13页
  • 作者

    Dai Kaoshan; Luo Xiang; Lu Yang; Li Bo; Zhong Jie; Zhang Shiming; Zhang Ruifu; Ge Qingzi;

  • 作者单位

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Underground Sci & Engn Chengdu 610065 Peoples R China|Sichuan Univ Dept Civil Engn Chengdu 610065 Peoples R China|Sichuan Univ Inst Disaster Management & Reconstruct Chengdu 610065 Peoples R China|Sichuan Univ Key Lab Sichuan Prov Failure Mech & Engn Disaster Prevent & Mitigat Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Underground Sci & Engn Chengdu 610065 Peoples R China|Sichuan Univ Dept Civil Engn Chengdu 610065 Peoples R China|Sichuan Univ Inst Disaster Management & Reconstruct Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Underground Sci & Engn Chengdu 610065 Peoples R China|Sichuan Univ Dept Civil Engn Chengdu 610065 Peoples R China|Sichuan Univ Inst Disaster Management & Reconstruct Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Underground Sci & Engn Chengdu 610065 Peoples R China|Sichuan Univ Dept Civil Engn Chengdu 610065 Peoples R China|Sichuan Univ Inst Disaster Management & Reconstruct Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Underground Sci & Engn Chengdu 610065 Peoples R China|Sichuan Univ Dept Civil Engn Chengdu 610065 Peoples R China|Sichuan Univ Inst Disaster Management & Reconstruct Chengdu 610065 Peoples R China;

    Tongji Univ Dept Disaster Mitigat Struct Shanghai 200092 Peoples R China;

    Tongji Univ Dept Disaster Mitigat Struct Shanghai 200092 Peoples R China;

    Sichuan Inst Bldg Res Chengdu 610081 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Base isolation; Adjacent building; Collision; Bidirectional near-fault ground motion; Seismic wave incidence angle; Damper;

    机译：基本隔离;相邻的建筑;碰撞;双向近断层地面运动;地震波入射角;阻尼器;

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