Performance-based seismic design of buildings

加拿大和其他地方的建筑规范在传统上是规范性的。规定性规范是根据特定的材料和方法，而不是性能标准，规定设计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。PBD有望提供更灵活的设计框架，以确保安全性和性能，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的性能水平，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，建筑PBD的完整框架尚未可用。本文主要研究基于性能的建筑抗震设计（PBSD）。一般来说，PBSD是根据特定地震危险等级下的位移和损伤来定义目标性能的。虽然最近对PBSD进行了大量研究，但仍有许多问题尚未解决，例如，在当前建筑规范的约束下实现PBSD的强大机制的可用性，以及可靠和简化的PBSD和建筑物抗震性能评估方法。拟议的研究将解决这些问题，并从评估NBCC 2005的抗震规定开始，以确定新建筑的抗震性能，并开发出优化此类建筑性能的方法。将开发可靠的简化方法，用于分析建筑物在多级地震灾害下的性能。除了新建筑的设计之外，本文开发的方法也可以潜在地用于现有建筑的基于性能的抗震升级。拟议的研究具有重大的创新潜力，旨在提高抗震设计的基本知识，并开发设计经济和安全建筑结构的方法。

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.