• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Structural Performance of Concrete Columns Incorporating Advanced Materials and Structural Systems >Seismic Fragility Assessment of Shape Memory Alloy Reinforced Concrete Bridge Piers under Long Duration and Near-Fault Ground Motions
【24h】

Seismic Fragility Assessment of Shape Memory Alloy Reinforced Concrete Bridge Piers under Long Duration and Near-Fault Ground Motions

机译：长持续时间和近端故障地面运动下造型记忆合金钢筋混凝土桥墩的地震脆弱性评估

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In recent years, shape memory alloys (SMA) have drawn significant attention and interests among researchers and structural engineers for diverse civil engineering applications. Superelasticity, shape memory effect, and hysteretic damping are the three major characteristics of SMAs that make them appropriate for bridge engineering applications in high seismic zones. Recent earthquake events have shown the most devastating earthquake loading that structures could experience are the near-fault ground motions. On the other hand, the ground motion duration effect on structural response has attracted a lot of interest over the last decade. This study aims to evaluate the comparative seismic fragility of concrete bridge piers reinforced with SMA rebars and steel rebars in the plastic hinge region under long duration and near-fault earthquakes. The bridge pier is assumed to be part of a lifeline bridge located in Western Canada and has been designed following a performance-based design approach. Fragility analysis has been conducted considering uncertainty in the material properties and the seismic hazard of the site location. Fragility curves are developed using suits of long duration and near-fault motions where each suite contains 20 ground motions. The vulnerability of the SMA-RC bridge piers and steel-RC bridge piers has been evaluated in terms of maximum drift and residual drift as the demand parameters. The outcome of this study indicates how the performance of the SMA-RC bridge pier and steel-RC bridge pier are affected by the duration of ground motion and fault location.
机译：近年来，形状记忆合金（SMA）对各种土木工程应用的研究人员和结构工程师进行了重大关注和兴趣。超弹性，形状记忆效应和滞后阻尼是SMA的三个主要特性，使其适用于高地震区的桥梁工程应用。最近的地震事件表明，结构可能经历的最毁灭性地震载荷是近乎故障的地面运动。另一方面，对结构反应的地面行动持续时间影响引起了过去十年的兴趣。本研究旨在在长期和近乎故障地震下，评估用SMA钢筋和钢筋和塑料铰链区域中加强的混凝土桥墩的比较地震脆性。 Bridge Pier被认为是位于加拿大西部的生命线桥的一部分，并遵循基于性能的设计方法。考虑到材料特性的不确定性以及现场地震危害，已经进行了脆弱性分析。脆弱曲线是使用长持续时间和近故障运动的套件开发的，每个套件都包含20个地面运动。根据需求参数，在最大漂移和残余漂移方面评估了SMA-RC桥接桥墩和钢RC桥墩的漏洞。本研究的结果表明SMA-RC桥接码头和钢RC桥墩的性能如何受到地面运动和故障位置的持续时间的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号