高层同心支撑钢框架的震后耐火性能

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-07-01 DOI:10.12989/EAS.2021.21.1.011

Rasul Kaffasha, A. Karamodin

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引用次数: 0

摘要

地震后发生的火灾给位于中高地震区的建筑物带来了很大的问题。为了了解地震后火灾对结构的影响，本文采用有限元方法，研究了高钢同心支撑框架在这种荷载作用下的性能。采用非线性时程分析方法对地震荷载作用下的地震反应进行了模拟。假设结构的地震后情况为初始条件，使用暴露元件的温度-时间图进行机械热分析。分析结果表明，无论地震记录和火灾场景如何，高层钢同心支撑框架的耐火持续时间较短，前一次地震对结构耐火性的影响不大。

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Post-earthquake fire resistance of tall steel concentrically braced frames

The fire which occurs after an earthquake causes great problems for buildings situated in moderate to high seismic regions. In this article in order to have an understanding regarding the impacts of post-earthquake fire on the structures, implementing the finite element method, the behaviour of tall steel concentrically braced frames when subjected to this type of loading was investigated. The simulation under seismic loading was done using the nonlinear time history analysis. Assuming the post-earthquake situation of the structure as the initial condition, the mechanical-thermal analysis was applied using the temperature-time diagram on the exposed elements. The analysis results showed that regardless of the earthquake record and fire scenarios for the tall steel concentrically braced frames, the fire resistance duration was short and the impacts of the previous earthquake on the structure fire resistance were not considerable.

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response