隔震橡胶支座防火保护试验研究
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摘要
隔震橡胶支座的耐火性能通常较差,威胁着隔震结构(特别是层间隔震结构)的火灾安全。在ISO 834标准升温条件下,通过2个采用厚型防火涂料的隔震橡胶支座的明火试验,对比分析了隔震橡胶支座在火灾前、后的力学性能。利用ANSYS软件,分析了试验支座的内部温度场,并与实测结果进行了对比。研究结果表明:对于采用厚度50mm的防火涂料和相应构造措施进行保护处理的隔震橡胶支座,在持续3h的明火试验后,无铅芯橡胶支座和铅芯橡胶支座的表观特征均无明显变化,各项力学性能指标与受火前相比变化幅度均小于8%,水平极限变形能力满足现行规范要求;验证了隔震橡胶支座防火保护措施的有效性。
Fire resistant capacity of rubber isolation bearings is usually poor,resulting in a poor fire safety of isolation structures(especially story-isolation structures).Two fire-protected rubber isolation bearings were tested under ISO 834 standard heating process.Experiments aiming to compare the mechanical properties of the bearings before and after fire test were conducted.Thermal fields of the specimens were analyzed using the computer program ANSYS,and compared with the measured results.Test results indicate that after 3 hours of fire,the specimens with fire insulation of 50mm thick do not show any visible changes in their appearance.The degradation of their mechanical properties do not exceed 8%.And their lateral ultimate deformation capacities comply with the requirements specified in the Chinese codes.It is demonstrated that the insulation measures proposed in this paper is suitable for fire protection of rubber isolation bearings.
Fire resistant capacity of rubber isolation bearings is usually poor,resulting in a poor fire safety of isolation structures(especially story-isolation structures).Two fire-protected rubber isolation bearings were tested under ISO 834 standard heating process.Experiments aiming to compare the mechanical properties of the bearings before and after fire test were conducted.Thermal fields of the specimens were analyzed using the computer program ANSYS,and compared with the measured results.Test results indicate that after 3 hours of fire,the specimens with fire insulation of 50mm thick do not show any visible changes in their appearance.The degradation of their mechanical properties do not exceed 8%.And their lateral ultimate deformation capacities comply with the requirements specified in the Chinese codes.It is demonstrated that the insulation measures proposed in this paper is suitable for fire protection of rubber isolation bearings.
引文
[1]周锡元,吴育才.工程抗震的新发展[M].北京:清华大学出版社,2002.(Zhou Xiyuan,Wu Yucai.Advances in earthquake engineering[M].Beijing:Tsinghua University Press,2002.(in Chinese))
[2]加藤朝郎,道越真太郎,大場政章,等.FBR免震設計に関する研究:その28積層ゴムの載荷加熱試験[C]//日本建築学会大会学術講演梗概集.东京,日本:日本建築学会,1999:1215-1216.(Kato A,Oba M,Michikoshi S,et al.Study on structural designfor seismic isolated FBR:part 28:fire test results ofrubber bearings[C]//Summaries of Technical Papersof Annual Meeting AIJ.Tokyo,Japan:ArchitecturalInstitute of Japan,1999:1215-1216.(in Japanese))
[3]堀長生,高橋晃一郎,村岡宏,等.FBR免震設計に関する研究:その16コンカロリメタによる免震ゴム材料の燃焼性評価[C]//日本建築学会大会学術講演梗概集.东京,日本:日本建築学会,1997:1047-1048.(Hori N,Takahashi K,Muraoka K,et al.Study on structural design for seismic isolatedFBR plant:part 16:combustible evaluation of rubbersusing cone calorimeter method[C]//Summaries ofTechnical Papers of Annual Meeting AIJ.Tokyo,Japan:Architectural Institute of Japan,1997:1047-1048.(in Japanese))
[4]原春彦.防振橡胶及其应用[M].牟传文,译.北京:中国铁道出版社,1982.(Tohara Haruhiko.Rubber vibration isolator[M].Translated by MuChuanwen.Beijing:China Railway Publishing House,1982.(in Chinese))
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[6]刘文光,杨巧荣,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):40-44.(Liu Wenguang,Yang Qiaorong,Zhou Fulin.Temperature properties of natural rubber bearings[J].World Earthquake Engineering,2003,19(2):40-44.(in Chinese))
[7]日本免震构造协会.免震建築のヂィテル设计[M].东京:株式仙缯脟1999.(Japan Societyof Seismic Isolation.The detail design of seismicisolation building[M].Tokyo:Shokokusha Publishing,1999.(in Japanese))
[8]小山実,長谷川治,横山隆太郎.耐火被覆を有する積層ゴムの耐火試験[C]//日本建築学会大会学術講演梗概集.东京,日本:日本建築学会,1998:573-574.(Koyama M,Hasegawa O,Yokoyama R.Fireresistance test of fire-protected laminated rubberbearings[C]//Summaries of Technical Papers ofAnnual Meeting AIJ.Tokyo,Japan:ArchitecturalInstitute of Japan,1998:573-574.(in Japanese))
[9]JG 118—2000建筑隔震橡胶支座[S].(JG 118—2000 Rubber isolation bearings for buildings[S].(inChinese))
[10]Wu Bo,Han Liwei,Zhou Fulin,et al.Experimentalstudy on fire performance and protection of buildingseismic rubber bearings[C]//Proceedings of the SixthInternational Conference on Structures in Fire.EastLansing,USA:Michigan State University,2010:775-783.
[11]GB/T9978—1999建筑构件耐火试验方法[S].(GB/T 9978—1999 Fire-resistance tests-elements ofbuilding construction[S].(in Chinese))
[12]Williamsa B,Bisby L,Kodur V,et al.Fire insulationschemes for FRP-strengthened concrete slabs[J].Composites Part A:Applied Science andManufacturing,2006,37(8):1151-1160.
[13]GB/T20688.1—2007橡胶支座:第1部分:隔震橡胶支座试验方法[S].(GB/T 20688.1—2007Rubber bearings:part 1:seismic-protection isolatorstest methods[S].(in Chinese))
[14]GB 50011—2001建筑抗震设计规范[S].(GB50011—2001 Code for seismic design of buildings[S].(in Chinese))
[2]加藤朝郎,道越真太郎,大場政章,等.FBR免震設計に関する研究:その28積層ゴムの載荷加熱試験[C]//日本建築学会大会学術講演梗概集.东京,日本:日本建築学会,1999:1215-1216.(Kato A,Oba M,Michikoshi S,et al.Study on structural designfor seismic isolated FBR:part 28:fire test results ofrubber bearings[C]//Summaries of Technical Papersof Annual Meeting AIJ.Tokyo,Japan:ArchitecturalInstitute of Japan,1999:1215-1216.(in Japanese))
[3]堀長生,高橋晃一郎,村岡宏,等.FBR免震設計に関する研究:その16コンカロリメタによる免震ゴム材料の燃焼性評価[C]//日本建築学会大会学術講演梗概集.东京,日本:日本建築学会,1997:1047-1048.(Hori N,Takahashi K,Muraoka K,et al.Study on structural design for seismic isolatedFBR plant:part 16:combustible evaluation of rubbersusing cone calorimeter method[C]//Summaries ofTechnical Papers of Annual Meeting AIJ.Tokyo,Japan:Architectural Institute of Japan,1997:1047-1048.(in Japanese))
[4]原春彦.防振橡胶及其应用[M].牟传文,译.北京:中国铁道出版社,1982.(Tohara Haruhiko.Rubber vibration isolator[M].Translated by MuChuanwen.Beijing:China Railway Publishing House,1982.(in Chinese))
[5]刘文光,杨巧荣,周福霖.天然橡胶隔震支座温度相关性能试验研究[J].广州大学学报:自然科学版,2002,1(6):51-56.(Liu Wenguang,Yang Qiaorong,Zhou Fulin.Temperature properties of natural rubberbearings[J].Journal of Guangzhou University:NaturalScience Edition,2002,1(6):51-56.(in Chinese))
[6]刘文光,杨巧荣,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):40-44.(Liu Wenguang,Yang Qiaorong,Zhou Fulin.Temperature properties of natural rubber bearings[J].World Earthquake Engineering,2003,19(2):40-44.(in Chinese))
[7]日本免震构造协会.免震建築のヂィテル设计[M].东京:株式仙缯脟1999.(Japan Societyof Seismic Isolation.The detail design of seismicisolation building[M].Tokyo:Shokokusha Publishing,1999.(in Japanese))
[8]小山実,長谷川治,横山隆太郎.耐火被覆を有する積層ゴムの耐火試験[C]//日本建築学会大会学術講演梗概集.东京,日本:日本建築学会,1998:573-574.(Koyama M,Hasegawa O,Yokoyama R.Fireresistance test of fire-protected laminated rubberbearings[C]//Summaries of Technical Papers ofAnnual Meeting AIJ.Tokyo,Japan:ArchitecturalInstitute of Japan,1998:573-574.(in Japanese))
[9]JG 118—2000建筑隔震橡胶支座[S].(JG 118—2000 Rubber isolation bearings for buildings[S].(inChinese))
[10]Wu Bo,Han Liwei,Zhou Fulin,et al.Experimentalstudy on fire performance and protection of buildingseismic rubber bearings[C]//Proceedings of the SixthInternational Conference on Structures in Fire.EastLansing,USA:Michigan State University,2010:775-783.
[11]GB/T9978—1999建筑构件耐火试验方法[S].(GB/T 9978—1999 Fire-resistance tests-elements ofbuilding construction[S].(in Chinese))
[12]Williamsa B,Bisby L,Kodur V,et al.Fire insulationschemes for FRP-strengthened concrete slabs[J].Composites Part A:Applied Science andManufacturing,2006,37(8):1151-1160.
[13]GB/T20688.1—2007橡胶支座:第1部分:隔震橡胶支座试验方法[S].(GB/T 20688.1—2007Rubber bearings:part 1:seismic-protection isolatorstest methods[S].(in Chinese))
[14]GB 50011—2001建筑抗震设计规范[S].(GB50011—2001 Code for seismic design of buildings[S].(in Chinese))
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