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| Study on the collapse process of the complex structure of the high-rise building under fire |
| Received:November 12, 2016 Revised:July 03, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20161112001 |
| KeyWord:construction safety fire the continuous collapse process research |
| Author | Institution |
| 崔铁军 |
辽宁工程技术大学 安全科学与工程学院, 阜新 ;大连交通大学辽宁省隧道与地下结构工程技术研究中心, 大连 |
| 李莎莎 |
辽宁工程技术大学 安全科学与工程学院, 阜新 |
| 王来贵 |
辽宁工程技术大学 力学与工程学院, 阜新 |
| 马云东 |
大连交通大学辽宁省隧道与地下结构工程技术研究中心, 大连 |
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| Abstract: |
| In order to explore the collapse characteristics of a multi-core tube hollow structure of a complex high-rise building under fire,fire simulation is implemented as particle flow.The building is a hollow four-core barrel frame structure.According to its characteristic,two kinds of fire plans are designed,including fire from one side and fire on both sides,at the simulated temperatures of 1000℃,1200℃,1400℃ and 1600℃.In the above situations,the collapse of the building process is simulated,and its characteristics and collapse time are analysed.The collapse phenomenon can be ummarised as follows:during the collapse of this kind of buildings in a side fire,relatively simple parts of the high-rise buildings are more likely to suffer from sitting collapse, which is advantageous to control the extent of destruction.There are two main locations of sitting collapse:31 m high order position and upper fire area.Early collapse is due to fire;later sitting collapse is due to the structure damage and instability of the bottom of the structure.Compared with one-sided fire,two-sided fire area leads to faster collapse;as a result,the fire collapse stage is shorter and subsequent instability in sitting collapse takes longer. |
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