• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of earthquake engineering >Seismic performance of alternative risk-reduction retrofit strategies to support decision making
【24h】

Seismic performance of alternative risk-reduction retrofit strategies to support decision making

机译：替代风险减少改造策略的地震表现，支持决策

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

How can we evaluate the cost-effectiveness of retrofit interventions aiming at reducing the seismic vulnerability of an existing building? What level of shaking intensity should the retrofitted building sustain? These are open questions affecting either the pre-earthquake prevention, the post-earthquake emergency and the reconstruction phases. The (mis)conception that the cost of retrofit interventions would increase linearly with the level of safety required in designing the intervention often discourages stakeholders to consider alternative retrofit options. As a result, a minimum (in some cases prescribed by-law) level of safety is often targeted, leading in some cases to no-action. Furthermore, the performance measure enforcing owners to take action is generally evaluated following a deterministic approach. When the assessment does not directly reflect, even in simplified terms, epistemic uncertainties and aleatory randomness, it can result in misleading confidence on the expected performance. The present study aims at contributing to the delicate decision-making process of retrofitting existing structures, by developing a framework to assist stakeholders with the evaluation of the actual improvement of the performance, expressed in terms of reduction of collapse probability, of alternative strategies of intervention as well as targeted retrofit levels. With reference to a pre-1970 case study building located in New Zealand, alternative retrofit solutions are considered, targeting different levels of performance, and the probability of reaching collapse when considering a set of ground-motions is evaluated, providing a correlation between the deterministic safety index adopted in the design phase (named "Percentage of New Building Standard" adopting New Zealand regulations) and the expected annual probability of collapse.
机译：我们如何评估改造干预的成本效益，旨在减少现有建筑物的地震脆弱性？改装建筑维持的震动强度是多少？这些是影响前地震预防，后地震急救和重建阶段的开放性问题。 （MIS）概念：改造干预的成本将随着设计所需的安全水平而导致，设计干预措施通常会阻止利益相关者考虑替代改造方案。因此，最低（在法律规定的某些情况下）安全水平通常是针对性的，在某些情况下导致无行动。此外，通常在确定性方法后评估执行业主进行行动的性能措施。当评估没有直接反映时，即使在简化的术语，认知不确定性和杀菌性随机性，也可能导致对预期绩效的信心误导。本研究旨在通过制定框架来协助利益相关者进行实际改善的框架，在减少崩溃概率的情况下表达的替代方案的实际改善的评估，有助于改造现有结构的微妙决策过程。以及有针对性的改造水平。参考位于新西兰的1970年案例研究建筑，考虑替代改造解决方案，靶向不同水平的性能，并且在考虑一组地面运动时达到崩溃的可能性，提供了确定性之间的相关性设计阶段采用的安全指数（名为“采用新西兰法规”的新建筑标准百分比）和预期的崩溃年度概率。

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