Improved consideration of dynamic loads and effects in design of exposed structures

在裸露结构的设计中改进了对动态载荷和效应的考虑

• 批准号: 121270-2013
• 负责人: McClure, Ghyslaine
• 金额: $ 1.89万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=522110
• 关键词: Improved; consideration; dynamic; loads; effects

Current structural engineering practice continues to rely extensively on static analysis methods for design. After over 30 years of extensive use of the limit states or reliability-based design method in most structural design codes worldwide, this approach has exposed its weaknesses for assessing the mechanical security and integrity of critical structures exposed to extreme environmental loads. The performance-based design approach introduced in recent years relies heavily on past methods, essentially accepting limit-states design solutions as acceptable solutions, leaving the issues of security and integrity to the interpretation of designers. Most extreme environmental loads have potentially dynamic effects on exposed structures, and consideration of failure or progressive collapse scenarios cannot generally ignore those dynamic effects when predicting structural response. As such, true performance-based design precludes reliable and relatively accurate response prediction that is rarely feasible with simplified static methods.

当前的结构工程实践继续广泛依赖于设计的静态分析方法。在全球大多数结构设计代码中，在大多数结构设计代码中广泛使用了30多年的广泛使用，这种方法暴露了其弱点，以评估暴露于极端环境负载的关键结构的机械安全性和完整性。近年来引入的基于绩效的设计方法在很大程度上取决于过去的方法，本质上接受极限态设计解决方案是可接受的解决方案，将安全性和完整性问题留在了设计师的解释中。大多数极端的环境负荷对裸露的结构具有潜在的动态影响，并且考虑到预测结构反应时，对失败或进行性崩溃的情况通常不能忽略这些动态影响。因此，真正的基于性能的设计排除了可靠且相对准确的响应预测，这些预测很少使用简化的静态方法。