THE SEISMIC EVALUATION OF UNDER MAINSHOCK- FIRE DAMAGED BUILDINGS UNDER-AFTERSHOCK EARTHQUAKES

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 188

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شناسه ملی سند علمی:

SEE08_528

تاریخ نمایه سازی: 23 آبان 1399

چکیده مقاله:

In the current design codes, the concomitant or subsequent occurrence of earthquakes and fires has not been addressed so far. Nevertheless, fire is the greatest danger to the safety of people immediately after the earthquake. Fires are often triggered as a consequence of damage caused by the earthquake and are possible to cause major additional damage to buildings and other constructions. Bursting of gas pipelines, damage to electrical cables and water supply systems failure are the commonest causes of post-earthquake fire in the modern world. Besides that, the process of confronting the fire could be disrupted by the occurrence of earthquake because earthquake could limit accessibility to fire extinguishing systems including fire extinguisher, sprinkler, to name but a handful or disturb the urban transport system and prevent the timely arrival of the firefighters, so fires following earthquakes are often more devastating than earthquakes themselves. For example, one of the most famous earthquakes that led to widespread fires was the 2011 Japan earthquake, which caused powerful tsunami waves and severe structural damage in northeastern Japan including heavy damage to roads and railways as well as fires in many areas and a dam collapse (Tanaka, 2012). The likelihood of occurrence of aftershocks following the main earthquake may decrease the remained capacity of structures damaged from mainshock and fire following that. The response of the structure to aftershock following the post-earthquake fire has not been considered thus far. In this research, a 10-story moment-resisting steel frame consists of four bays with a span of 7.5 m and each floor 3.5 m height is chosen as case study shown in Figure 1. In the current research, the response of frame to earthquake, fire, and aftershock is investigated and compared with the response of the intact frame, by means of numerical analysis using OpenSees software. In this regard, a three-stage approach is used.

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نویسندگان

Mohammad KHANMOHAMMADI

Associate Professor, School of Civil Engineering, University of Tehran, Tehran, Iran

Ghazal SAED

M.Sc. Student, School of Civil Engineering, University of Tehran, Tehran, Iran