| Summary: | 碩士 === 中國文化大學 === 建築及都市計畫研究所 === 97 === The purpose of the research is to analysis the effect on the stiffness of the isolator which exposed to fire by experiment data of fireproof coating material exposed to fire and simulation by computer program, and to understand how the variation of isolator material’s physical performance affect the seismic response of building.
According to the code the isolation layer can not be using, it was a way to protect the isolation avoided the damage cased by fire、scrape and crake. This research use five type of fire protecting method according to un-coating fireproof material、coating steel、coating calcium silicate board、coating magnesia board and coating fireproof paint etc and compare the result of fire prevention with isolator stiffness attenuation. Then analyze the seismic reaction of isolation building with different fireproof coating material after fire damage by ETABS computer program.
In documents, coating steel and coating calcium silicate board did not work; the boards were made a hold by fire under an hour and the temperature of isolators which were inside the board reaches to 1200℃. Coating magnesia board and coating fireproof paint have basic protect function. Because of t magnesia, temperature of the scene of a fire is over 1200℃, the temperature of isolators which were inside the board are only 350℃~450℃.
Analysis the seismic response of building with different fireproof boards after fire damage by computer program, we can find that the vary of story displacement and drift angle is more obviously. Because of the stiffness of isolation building without fireproof boards attenuate, the story displacement increases 1.6%~5%. There still have enough strength for isolation building .There will be great effect of isolation building if the isolator stiffness attenuation 50%. Shear force in X direction of isolation building attenuate 28.6% than original structure；Story displacement of isolation building increases 5.2%~16% than original structure. From the data of isolator stiffness attenuation 50%, we can know that the drift angle increase 9.7%~20.2% and Story Shear force attenuate 8.9%~28.6%.
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