钢筋-沥青隔震墩砌体结构足尺模型试验研究
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摘要
针对广大农村低矮房屋抗震能力普遍不足的现状,根据基础隔震理论,在钢筋-沥青复合隔震层的基础上,提出了钢筋-沥青隔震墩。并以单层单开间砌体结构房屋为研究对象,进行了足尺模型拟动力试验。通过隔震墩上、下楼板布置的拾振器测得上下部加速度幅值,用其比值衡量减震效果。研究结果表明:在各种振动波输入下,隔震墩吸收了大部分的能量,隔震墩上部楼板加速度反应可以衰减到隔震墩下部楼板加速度反应的50%以下,具有较好的减震效果;随着振动频率的增大,水平两个方向加速度衰减系数也相应减小;而随着控制位移的加大,加速度衰减系数相应增大;从输入加速度大小方面分析则随加速度峰值的增大,加速度衰减系数有减小的趋势。
In response to the poor seismic performance of the widely constructed low rise residential buildings in rural areas,the steel and asphalt isolation pier is proposed based on the base isolation theory and the composite steel and asphalt isolation layer.The full scale pseudo dynamic test was carried out on a one story and single span masonry building model.The magnitudes of the accelerations at the top and bottom of the isolation pier were measured by acceleration sensors and used to evaluate the seismic mitigation effect.The test results show that the isolation piers can absorb most of the input energy from various earthquake waves.The acceleration of the top slab of the isolation pier can be reduced to be less than 50% of that of the bottom slab of the isolation pier,indicating good earthquake mitigation effect.Along with the increase of the vibration frequencies,the acceleration reduction factors in the two horizontal directions decrease accordingly.With the increase of the controlling displacement,the acceleration reduction factor increases accordingly.With the increase of the input acceleration,the acceleration reduction factors decreases.
In response to the poor seismic performance of the widely constructed low rise residential buildings in rural areas,the steel and asphalt isolation pier is proposed based on the base isolation theory and the composite steel and asphalt isolation layer.The full scale pseudo dynamic test was carried out on a one story and single span masonry building model.The magnitudes of the accelerations at the top and bottom of the isolation pier were measured by acceleration sensors and used to evaluate the seismic mitigation effect.The test results show that the isolation piers can absorb most of the input energy from various earthquake waves.The acceleration of the top slab of the isolation pier can be reduced to be less than 50% of that of the bottom slab of the isolation pier,indicating good earthquake mitigation effect.Along with the increase of the vibration frequencies,the acceleration reduction factors in the two horizontal directions decrease accordingly.With the increase of the controlling displacement,the acceleration reduction factor increases accordingly.With the increase of the input acceleration,the acceleration reduction factors decreases.
引文
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[2]尚守平,周福霖.结构抗震设计[M].北京:高等教育出版社,2003:8-10.(Shang Shouping,Zhou Fulin.Structural seismic design[M].Beijing:HigherEducation Press,2003:8-10.(in Chinese))
[3]武田寿一.建筑物隔震防振与控振[M].北京:中国建筑工业出版社,1997:108-120.(Takeda Hisaichi.Building isolation antivibration and vibration control[M].Beijing:China Architecture&Building Press,1997:108-120.(in Chinese))
[4]苏经宇,曾德民.我国建筑结构隔震技术的研究与应用[J].地震工程与工程振动,2001,21(4):94-101.(Su Jingyu,Zeng Deming.Research and application ofseismic isolation of buildings in China[J].EarthquakeEngineering and Engineering Vibration,2001,21(4):94-101.(in Chinese))
[5]Naeim F,Kelly J M.Design of seismic isolatedstructures from theory to practice[M].New York:JohnWiley and Sons Inc,1999:123-142.
[6]韩淼,王秀梅.基础隔震技术的研究现状[J].北京建筑工程学院学报,2004,20(2):11-13.(Han Miao,Wang Xiumei.The present situation of base-isolationtechnology[J].Journal of Beijing Institute of CivilEngineering and Architecture,2004,20(2):11-13.(inChinese))
[7]周志锦.一种钢筋-沥青复合隔震层的研究[D].长沙:湖南大学,2009:27-29.(Zhou Zhijin.The researchon the steel-asphalt isolation lay[D].Changsha:HunanUniversity,2009:27-29.(in Chinese))
[8]尚守平,周志锦.一种钢筋-沥青复合隔震层的性能[J].铁道科学与工程学报,2009,6(3):13-16.(Shang Shouping,Zhou Zhijin.The research on thesteel-asphalt isolation lay[J].Journal of RailwayScience and Engineering,2009,6(3):13-16.(inChinese))
[9]王宁.隔震结构力学性能测试及振动台试验研究[D].北京:北京工业大学,2007:53.(Wang Ning.Isolation structure mechanics performance testing andshaking table test research[D].Beijing:BeijingUniversity of Technology,2007:53.(in Chinese))
[10]Lee D M.Base isolation for torsion reduction inasymmetric structures under earthquake loading[J].Earthquake Engineering and Structural Dynamics,1980,112(8):349-359.
[11]尚守平,姚菲.软土-铰接桩体系隔震性能的振动台试验研究[J].铁道科学与工程学报,2006,3(6):19-24.(Shang Shouping,Yao Fei.Shaking tabletesting of shock insulation by soft soil-hinged piersystem[J].Journal of Railway Science andEngineering,2006,3(6):19-24.(in Chinese))
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