地震作用下立筒群仓贮料侧压力试验研究
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摘要
为了研究地震作用下贮料对仓壁侧压力的变化规律,设计制作了立筒群仓结构1/16整体模型,并对其进行了模拟地震振动台试验,测试了模型结构在静态压力作用下以及在7度多遇、7度基本、7度罕遇和8度罕遇烈度地震作用下贮料对仓壁的侧压力值,并与Janssen理论计算值及规范设计值进行比较,得到了在地震作用下贮料对仓壁的侧压力的变化规律,试验结果表明:与单仓相比群仓具有较好的抗震性能,在7度抗震设防地区进行钢筋混凝土筒仓抗震设计时,仓壁按照规范设计值进行配筋是安全的,但需要对仓顶部分进行加强。
In order to study the earthquake effect on lateral pressures acting on the wall of a set of cylinder granular solids,1/16th structural model of the solids is made to simulate the shaking table test.It is tested for the side wall pressures of the solids under the case of static storage materials as well as the earthquakes of more than 7 degrees,7 degrees basic,7 degrees and 8 degrees.Afterwards,the tested results are compared with Janssen theory and his standard design values,then the variation of the side pressures on the wall of silos due to storage materials induced by earthquakes is presented.Further more,it is shown that the seismic performance of a group of granular solids is verified much better to be compared with a single granular solid,another achievement obtained from the experimental study is that it is safe for the wall of the solids to be designed according to the current Chinese Specifications for the reinforcements in 7 degree earthquake areas,whereas reinforcements on the top part of the solids should be strengthened.
In order to study the earthquake effect on lateral pressures acting on the wall of a set of cylinder granular solids,1/16th structural model of the solids is made to simulate the shaking table test.It is tested for the side wall pressures of the solids under the case of static storage materials as well as the earthquakes of more than 7 degrees,7 degrees basic,7 degrees and 8 degrees.Afterwards,the tested results are compared with Janssen theory and his standard design values,then the variation of the side pressures on the wall of silos due to storage materials induced by earthquakes is presented.Further more,it is shown that the seismic performance of a group of granular solids is verified much better to be compared with a single granular solid,another achievement obtained from the experimental study is that it is safe for the wall of the solids to be designed according to the current Chinese Specifications for the reinforcements in 7 degree earthquake areas,whereas reinforcements on the top part of the solids should be strengthened.
引文
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[10]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 TableTests[J].Earthquake Engineering and Engineering Vibration,1997,17(2):52-58(in Chinese).
[11]施卫星,丁美,成广伟,等.超限高层建筑整体模型模拟地震振动台试验研究[J].四川大学学报,2007,39(4):50-56.Shi Weixing,DingMei,Cheng Guangwei,Sun Huangsheng.ShakingTable Model Test of a High-rise Building Structure[J].Journal ofSichuan University,2007,39(4):50-56.
[12]王录民,张华.钢筋混凝土立筒群仓结构抗震模型的设计与制作[J].结构工程师,2008,24(2):126-128.Wang Lumin,Zhang Hua.Design and Construction for a SeismicModel of Reinforced Concrete Group Silos[J].Structural Engi-neers,2008,24(2):126-128.
[13]Harry G Harris,Gajanan M Sabnis.Structural modeling and ex-perimental techniques[M].CRC Press,1999.
[14]马永欣,郑山锁.结构试验[M].北京:科学出版社,2001.
[15]李检保,吕西林,卢文胜,等.北京LG大厦单塔结构整体模型模拟地震振动台试验研究[J].建筑结构学报,2006,27(2):10-15.Li Jianbao,Lu Xilin,Lu Wensheng,Zhao Bin,Hou Guangyu,Chen Binlei.Shaking table model test of Beijing LG Building[J].Journal of Building Structures,2006,27(2):10-15(in Chinese).
[16]GB50077-2003钢筋混凝土筒仓设计规范[S].北京:中国计划出版社,2004.GB 50077-2003 Code for design of reinforced concrete silos[S].Beijing:China Planning Press,2004(in Chinese).
[2]张家康,黄文萃.筒仓贮料压力计算理论与方法[J].土木工程学报,2000,33(5):24-28.Zhang Jiakang,Huang Wencui.A New Method For Pressure Cal-culation in Silos[J].China Civil Engineering Journal,2000,33(5):24-28.
[3]刘定华,魏宜华.钢筋混凝土筒仓侧压力的计算与测试[J].建筑科学,1998,14(4):14-18.Liu Dinghua,Wei Yihua.Calculation and Testing of Lateral Pres-sure in a Reinforced Concrete Silo[J].Building Science,1998,14(4):14-18.
[4]Peter Knoedel,Thomas Ummenhofer and Utrieh Sehuiz.On themodelling of different types of imperfections in silo shells[J].Thin-walled Structure.1995,23:183-293.
[5]Tejchman J,Ummenhofer T.Bedding effects in bulk solids in silos:experiments and a polar hypoplastic approach.Thin-Walled Struc-tures,2000,37:333-361.
[6]Zhong Z,Ooiel J Y.at.The sensitivity silo flow and wall stresses tofilling method.Engineering Structures,2001,23:756-767.
[7]Alan W.Roberts,Christopher M.Wensrich.Flow dynamics or‘quaking’in gravity discharge from silos[J].Chemical Engineer-ing Science,2002,57:295-305.
[8]翟振威,原国平,张峰涛.筒仓贮料流态的颗粒流数值模拟[J].山西建筑,2008,34(35):90-92.Zhai Zhen-wei,Yuan Guo-ping,Zhang Feng-tao.The PFC demsimulation of the flow state of silo[J].Shanxi Architecture,2008,34(35):90-92.
[9]张翀,舒赣平.落地式钢筒仓卸料的模型试验研究[J].东南大学学报,2009,39(3):531-535.Zhang Chong,Shu Ganping.Experimental research of ground-sup-ported steel silo model's discharge[J].Journal of Southeast Univer-sity,2009,39(3):531-535.
[10]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 TableTests[J].Earthquake Engineering and Engineering Vibration,1997,17(2):52-58(in Chinese).
[11]施卫星,丁美,成广伟,等.超限高层建筑整体模型模拟地震振动台试验研究[J].四川大学学报,2007,39(4):50-56.Shi Weixing,DingMei,Cheng Guangwei,Sun Huangsheng.ShakingTable Model Test of a High-rise Building Structure[J].Journal ofSichuan University,2007,39(4):50-56.
[12]王录民,张华.钢筋混凝土立筒群仓结构抗震模型的设计与制作[J].结构工程师,2008,24(2):126-128.Wang Lumin,Zhang Hua.Design and Construction for a SeismicModel of Reinforced Concrete Group Silos[J].Structural Engi-neers,2008,24(2):126-128.
[13]Harry G Harris,Gajanan M Sabnis.Structural modeling and ex-perimental techniques[M].CRC Press,1999.
[14]马永欣,郑山锁.结构试验[M].北京:科学出版社,2001.
[15]李检保,吕西林,卢文胜,等.北京LG大厦单塔结构整体模型模拟地震振动台试验研究[J].建筑结构学报,2006,27(2):10-15.Li Jianbao,Lu Xilin,Lu Wensheng,Zhao Bin,Hou Guangyu,Chen Binlei.Shaking table model test of Beijing LG Building[J].Journal of Building Structures,2006,27(2):10-15(in Chinese).
[16]GB50077-2003钢筋混凝土筒仓设计规范[S].北京:中国计划出版社,2004.GB 50077-2003 Code for design of reinforced concrete silos[S].Beijing:China Planning Press,2004(in Chinese).
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