Performance-based seismic design of buildings

加拿大和其他地方的建筑法规传统上是规定性的。规范性规范是根据特定材料和方法而不是性能标准来指定设计解决方案和施工要求的规范。因此，设计过程变得高度规范和复杂。基于性能的设计(PBD)格式已经发展成为当前实践的替代方案。预计PBD将提供更灵活的设计框架，以确保安全和性能，并通过允许应用任何可接受和可验证的解决方案来实现给定水平的性能，从而促进设计创新。新版《加拿大国家建筑规范》(NBCC 2005)在这方面取得了一些进展，并为设计提供了一种基于目标的格式。然而，目前还没有关于建筑物PBD的完整框架。本文的研究重点是基于性能的建筑抗震设计。PBSD通常根据特定地震风险水平下的位移和破坏来定义目标绩效。虽然最近开展了许多关于建筑可持续发展的研究，但一些问题仍未得到解决，例如在现行建筑规范的限制下实现可持续发展的可靠机制的可用性，以及可持续发展和建筑物抗震性能评估的可靠和简化方法。拟议的研究将解决这些问题，并首先评估NBCC 2005的抗震条款，以确定新建筑的抗震性能，并开发可以优化此类建筑性能的方法。为进行多水平地震作用下的性能分析，将发展可靠和简化的建筑物抗震设防分析方法。除了用于新建筑的设计外，本文提出的方法也可用于现有建筑的基于性能的抗震升级。拟议的研究有很大的创新潜力，其目的是加强抗震设计的基本知识，并制定设计经济和更安全的建筑结构的方法。

The building codes in Canada and elsewhere are traditionally prescriptive in nature. A prescriptive code is one that specifies the design solutions and construction requirements according to particular materials and methods, rather than to performance criteria. As a result, the design process becomes highly regulated and complex. Performance Based Design (PBD) format has been evolving as an alternative to the current practice. PBD is expected to offer a more flexible framework for design to ensure safety and performance, and foster innovation in design by allowing the application of any acceptable and verifiable solution to achieve a given level of performance. The new edition of the National Building Code of Canada (NBCC 2005) has made some progress in that direction and provided an objective-based format for design. However, the full framework for PBD of buildings is not yet available. The proposed research focuses on the performance-based seismic design (PBSD) of buildings. PBSD generally defines the target performance in terms of displacement and damage under specified levels of seismic hazard. While much research has been carried out in the recent past on PBSD, a number of issues, such as, availability of a robust mechanism for achieving PBSD within the constraints of the current building codes, and reliable and simplified methods for PBSD and seismic performance evaluation of buildings, remained unresolved. The proposed research will address these issues, and begin by evaluating the seismic provisions of NBCC 2005 to determine the seismic performance of the new buildings, and developing methods by which the performance of such buildings can be optimized. Reliable and simplified methods for PBSD of buildings will be developed for performance analysis under multiple levels of seismic hazard. Apart from the design of new buildings, the methods developed herein can also be potentially used for performance-based seismic upgrade of existing buildings. There is a significant potential for innovation in the proposed research which aims at enhancing the fundamental knowledge on earthquake resistant design and developing methodologies for designing economical and safer building structures.