倒锥壳式水塔模型结构振动台试验研究
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摘要
地震作用下,水塔中的蓄水对水塔结构本身有着耗能减震作用。为研究不同蓄水量对钢筋混凝土倒锥壳式水塔结构抗震性能的影响规律,探寻有利于该类水塔结构抗震的蓄水水位,基于实际工程结构,依据相似原理设计制作了相似比为1∶30的有机玻璃倒锥壳式水塔模型。通过振动台试验,在不同水准的多条地震波激励下,研究了水塔模型在不同水位时的动力特性、加速度响应和位移响应。运用ABAQUS有限元软件进行数值模拟,并将试验结果和有限元分析结果进行验证和对比分析,结果表明:随着水位的增加,模型的自振周期逐渐增大;地震作用下,不同水位会不同程度地减小水塔模型的动力响应;不同地震波激励下,当蓄水水位在水箱最高水位的一半以上时,减震效果良好。
Water plays an active role in energy dissipation and damping control of the water tower structure under seismic excitations. This paper aims to study how different water storage affects the seismic performance of the reinforced concrete(RC) inverted conical water tower under ground motion and explore which is the best water level in shock absorption. Based on the similitude principle,a 1 /30 scaled model of organic glass inverted conical tower model was designed according to a real structure. Through shaking table test,the dynamic characteristics,acceleration and displacement response of the tower model with different water levels in different intensity levels were obtained. The numerical simulation results,which were calculated by ABAQUS finite element software,were compared with the shaking table test results. The research shows that as the water level increases,the natural vibration period of the model increases gradually. Different water levels will reduce dynamic response of the water tower to different extents.When the water level is more than half of the maximum,the damping effect is good,under different ground motions.
Water plays an active role in energy dissipation and damping control of the water tower structure under seismic excitations. This paper aims to study how different water storage affects the seismic performance of the reinforced concrete(RC) inverted conical water tower under ground motion and explore which is the best water level in shock absorption. Based on the similitude principle,a 1 /30 scaled model of organic glass inverted conical tower model was designed according to a real structure. Through shaking table test,the dynamic characteristics,acceleration and displacement response of the tower model with different water levels in different intensity levels were obtained. The numerical simulation results,which were calculated by ABAQUS finite element software,were compared with the shaking table test results. The research shows that as the water level increases,the natural vibration period of the model increases gradually. Different water levels will reduce dynamic response of the water tower to different extents.When the water level is more than half of the maximum,the damping effect is good,under different ground motions.
引文
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[12]聂君锋,张海泉,李红克,等.基于有限元方法的高温气冷堆燃料贮存罐跌落事故评价[J].清华大学学报(自然科学版),2013,53(5):679-682.(NIE Junfeng,ZHANG Haiquan,LI Hongke,et al.Finiteelement-method:based assessment on the dropping accident of a high temperature gas cooled reactor fuel cask[J].Journal of Tsinghua University(Science and Technology),2013,53(5):679-682.(in Chinese))
[13]MITTAL Vaibhav,CHAKRABORTY Tanusree,MATSAGAR Vasant.Dynamic analysis of liquid storage tank under blast using coupled Euler-Lagrange formulation[J].Thin-Walled Structures,2014,84:91-111.
[2]OMIDINASAB F,SHAKIB H.Seismic response evaluation of the RC elevated water tank with fluidstructure interaction and earthquake ensemble[J].KSCE Journal of Civil Engineering,2012,16(3):366-376.
[3]SHI Nietao,JU Jinsan,YOU Xiaochuan,et al.Dynamic buckling analysis on fluid-solid coupling of large liquid storage tank[J].Sensor Letters,2012,10(1/2):131-137.
[4]LIVAOGLU R,DOGANGUN A.Simplified seismic analysis procedures for elevated tanks considering fluidstructure-soil interaction[J].Journal of Fluids and Structure,2006,22(3):421-439.
[5]LIVAOGLU R,DOGANGUN A.Effect of foundation embedment on seismic behavior of elevated tanks considering fluid:structure-soil interaction[J].Soil Dynamics and Earthquake Engineering,2007,27(9):855-863.
[6]CHADUVULA Uma,PATEL Deepam,GOPALAKRISHNAN N.Fluid-structure-soil interaction effects on seismic behavior of elevated water tanks[J].Procedia Engineering,2013,51:84-91.
[7]尚春雨,张海军,赵建国.考虑水晃动作用时椭球形水塔的地震反应分析[J].钢结构,2010,25(1):15-20.(SHANG Chunyu,ZHANG Haijun,ZHAO Jianguo.Research on seismic response of ellipsoidal water tower considering water sloshing[J].Steel Construction,2010,25(1):15-20.(in Chinese))
[8]周颖,吕西林.建筑结构振动台模型试验方法与技术[M].北京:科学出版社,2012:23-28.(ZHOU Ying,LU Xilin.Method and technology for shaking table model test of building structures[M].Beijing:Science Press,2012:23-28.(in Chinese))
[9]连鸣,苏明周,李慎,等.Y形偏心支撑高强钢框架结构抗震性能振动台试验研究[J].建筑结构学报,2015,36(8):24-31.(LIAN Ming,SU Mingzhou,LI Shen,et al.Shake table test of seismic performance of high strength steel frames with Y-eccentric braces[J].Journal of Building Structures,2015,36(8):24-31.(in Chinese))
[10]王维,李爱群,贾洪,等.预制混凝土剪力墙隔震结构振动台试验研究[J].建筑结构学报,2015,36(6):35-43.(WANG Wei,LI Aiqun,JIA Hong,et al.Shaking table test of precast concrete shear wall isolation structure[J].Journal of Building Structures,2015,36(6):35-43.(in Chinese))
[11]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52-58.(ZHANG Minzheng.Study on similitude laws for shaking table tests[J].Earthquake Engineering and Engineering Vibration,1997,17(2):52-58.(in Chinese))
[12]聂君锋,张海泉,李红克,等.基于有限元方法的高温气冷堆燃料贮存罐跌落事故评价[J].清华大学学报(自然科学版),2013,53(5):679-682.(NIE Junfeng,ZHANG Haiquan,LI Hongke,et al.Finiteelement-method:based assessment on the dropping accident of a high temperature gas cooled reactor fuel cask[J].Journal of Tsinghua University(Science and Technology),2013,53(5):679-682.(in Chinese))
[13]MITTAL Vaibhav,CHAKRABORTY Tanusree,MATSAGAR Vasant.Dynamic analysis of liquid storage tank under blast using coupled Euler-Lagrange formulation[J].Thin-Walled Structures,2014,84:91-111.