砂-橡胶粒复合材料隔震垫层剪切试验
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摘要
为了进一步验证复合材料对上部结构的隔震减震效果,对不同配比的复合材料进行了剪切试验。砂分别选用细砂、中砂和粗砂,橡胶粒含量分别为0%、25%、50%、75%、100%,竖向压应力分别为75 437 Pa、125 663 Pa、226 111 Pa时,得出复合材料剪切过程中的力和位移曲线,得出每种工况下复合材料的抗剪强度和等效刚度,并对数据进行对比分析,总结出橡胶粒含量、砂颗粒的粒径和上部压应力对复合材料剪切性能的影响规律。
In order to further verify the seismic isolation and shock absorption effect of composite materials on superstructure,shear tests were carried out on composite materials with different ratios. Sand is selected from fine,medium and coarse sand. When the rubber content is 0 %,25%,50 %,75 %,and 100 %,and the vertical compressive stress is 75437 Pa,125663 Pa,and 226111 Pa respectively,the force and displacement curves in the shear process of the composite material are obtained,and the shear strength and equivalent stiffness of the composite material under each working condition are also acquired. By comparing and analyzing the data,the influence laws of rubber particle content,sand particle size and upper compressive stress on the shear performance of the composite material are concluded,and the equivalent stiffness of the device in the shear process is obtained.
In order to further verify the seismic isolation and shock absorption effect of composite materials on superstructure,shear tests were carried out on composite materials with different ratios. Sand is selected from fine,medium and coarse sand. When the rubber content is 0 %,25%,50 %,75 %,and 100 %,and the vertical compressive stress is 75437 Pa,125663 Pa,and 226111 Pa respectively,the force and displacement curves in the shear process of the composite material are obtained,and the shear strength and equivalent stiffness of the composite material under each working condition are also acquired. By comparing and analyzing the data,the influence laws of rubber particle content,sand particle size and upper compressive stress on the shear performance of the composite material are concluded,and the equivalent stiffness of the device in the shear process is obtained.
引文
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[2]TANG H H. Seismic isolation by rubber-soil mixtures for developing countries[J]. Earthquake Engng. Struct. Dyn.2007,18(2):205-211.
[3]MASAD E,TAHA R,HO C,et al. Engineering properties of tire/soil mixtures as a lightweight fill material[J].Geotechnical Testing Journal,1996,19(3):297-304.
[4]黄小霞.不同粒径比砂与橡胶粒隔震垫层振动台试验研[D].淮南:安徽理工大学,2017.
[5]吴延辉.砂与橡胶粒复合隔震垫层分析研究[D].淮南:安徽理工大学,2013.
[6]李想.立式储罐环梁滚动隔震设计与数值模拟[D].大庆:东北石油大学,2014.
[7]孙建刚,吕远,崔利富,等.高举架立式圆筒型储液容器附加粘滞阻尼器减震研究[J].压力容器,2017,34(7):19-27.
[8]吕远.高举架立式圆筒型储液容器减震技术及理论[D].大庆:东北石油大学,2017.
[9]尚守平,岁小溪,周志锦.橡胶颗粒-砂混合物动剪切模量的试验研究[J].岩土力学,2010,31(2):377-381.
[10]徐博.近断层地震动作用下大型立式储罐隔震数值仿真分析[D].兰州:兰州理工大学,2017.
[11]刘伟兵.桩土-基础隔震15×104m3储罐数值仿真分析[D].大庆:东北石油大学,2013.