2020 年加拿大国家建筑规范》更新对钢筋混凝土剪力墙建筑设计要求的影响

IF 1.1 4区工程技术 Q3 ENGINEERING, CIVIL

Canadian Journal of Civil Engineering Pub Date : 2024-01-22 DOI:10.1139/cjce-2023-0111

Saeed Dehghani, L. Tobber

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引用次数: 0

摘要

钢筋混凝土剪力墙 (RCSW) 系统的抗震要求是根据加拿大国家建筑规范 (NBC) 确定的。NBC 2020 采用了修订后的加拿大地震灾害模型 (CSHM)，并提出了根据特定的平均剪切波速（而不是指定的场地等级）确定设计频谱，从而提高要求精度的可能性。本文研究了与前一版本相比，对摇摆剪力墙设计要求的变化。为此，采用分布式质量和刚度程序对 55 个 RCSW 原型进行了建模，并在加拿大的五个地点通过模态响应谱分析 (MRSA) 对其动态响应进行了评估。结果表明，变形和力需求发生了显著变化，与 2015 年根据指定地点等级确定的需求相比，2020 年的大多数情况下都出现了增长。这项研究还对 NBC 2020 推荐的设计频谱加速度对数插值法进行了评估。

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Implications of the 2020 National Building Code of Canada Updates on the Design Demands for Reinforced Concrete Shear Wall Buildings

The seismic demands of the Reinforced Concrete Shear Walls (RCSWs) system are determined based on Canada's National Building Code (NBC). NBC 2020 features the revised Canadian Seismic Hazard Model (CSHM) and presents the possibility of enhancing demand's accuracy by determining design spectra based on the specific average shear wave velocity, instead of specified site classes. This paper investigates the changes in design demands for RCSWs compared to the previous edition. To do so, fifty-five RCSW prototypes were modelled using distributed mass and stiffness procedure, and their dynamic response was assessed through Modal Response Spectrum Analysis (MRSA) at five locations across Canada. The results highlight significant changes in deformation and force demands, where the majority of cases experienced an increase in 2020 compared to 2015 when demands were determined based on specified site classes. This study also evaluates the log-log interpolation method recommended by NBC 2020 for the design spectral acceleration.

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来源期刊

Canadian Journal of Civil Engineering 工程技术-工程：土木

CiteScore

3.00

自引率

7.10%

发文量

105

审稿时长

14 months

期刊介绍： The Canadian Journal of Civil Engineering is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structural engineering, construction engineering, engineering mechanics, engineering materials, and history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academia. New developments in engineering design and construction are also featured.