...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of earthquake engineering >An adjusted design approach for concentrically braced frames in low-to-moderate seismicity areas
【24h】

An adjusted design approach for concentrically braced frames in low-to-moderate seismicity areas

机译：低至中等地震性区域同心支撑框架的调整后的设计方法

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

Steel concentrically braced frame (CBF) configuration is a common construction application in Europe. In the low-to-moderate seismicity context, European building codes provide two alternative design methods for CBFs; engineers have to choose between a "non-dissipative" method (DCL) neglecting all seismic provisions, and a "dissipative" one (DCM), applying its complex and expensive ductility requirements. Currently, the preferred method is the former one, because of its simplicity. Such a choice may lead on one side to oversized profiles that are unduly expensive, on the other side to possibly unsafe solutions due to the unpredictable nature of the regions characterized by low-to-moderate seismicity, where rare but strong earthquakes are foreseeable. On the other hand, enforcing engineers to apply strict "high-dissipative" rules seems too conservative for this case, which would result in over-safe, but uneconomic structures. This article proposes an adjusted design approach for the low-to-moderate seismicity design of CBF structures, aiming to satisfy both economy and safety criteria. The proposed approach is based on the exploitation of the three features of CBF systems, which have not been deeply investigated so far: "frame action provided by gusset plates", "contribution of compression diagonal and its post-buckling strength and stiffness", and "energy dissipation capacity of non-ductile bracing joint connections". The paper investigates these aspects by means of incremental dynamic analysis of case studies, based on the numerical models calibrated on full-scale experimental tests published elsewhere by the authors. As a result, it provides design recommendations and presents economic comparisons between the buildings designed with current Eurocode approach and the proposed one.
机译：钢正常支撑框架（CBF）配置是欧洲的常见施工应用。在低至中等地震性上下文中，欧洲建筑规范为CBF提供了两种替代设计方法;工程师必须在忽视所有地震规定的“非耗散”方法（DCL）之间进行选择，以及“耗散”一（DCM），施加其复杂和昂贵的延展性要求。目前，优选的方法是前者，因为它的简单性。这种选择可能导致一侧的超大型材，这是一个过度昂贵的，另一方面是可能的不安全的解决方案，因为该区域的不可预应成的解决方案，其特征在于低于中等地震性，其中罕见但强烈的地震可预见。另一方面，对这种情况来说，强制执行严格的“高耗散”规则似乎过于保守，这将导致过度安全，但不经济的结构。本文提出了一种调整的CBF结构的低至适度地震性设计的设计方法，旨在满足经济和安全标准。所提出的方法是基于开发CBF系统的三种特征，目前尚未深入研究：“由角撑板提供的框架动作”，“压缩对角线的贡献及其后屈曲强度和刚度”，以及“非延展性支撑关节连接的能量耗散能力”。本文通过案例研究的增量动态分析来研究这些方面，基于作者在作者其他地方发布的全规模实验测试上校准的数值模型。因此，它提供了设计建议，并呈现了具有当前欧元展方法的建筑物和建议的建筑物之间的经济比较。

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