软粘土地基上建筑物不均匀震陷离心机试验研究
摘要
通过土工离心机振动台试验研究了软粘土地基上建筑物不均匀震陷问题,考察了结构物不对称性对不均匀震陷的影响.试验采用超固结高岭土地基和三维不对称结构物模型,以及整体对称的随机地震波输入,并利用弯曲元监测施振前后软土地基剪切波速以表征软土结构的演化.试验表明,软土地基不均匀震陷由地震瞬时沉降和震后长期固结沉降组成,基础不均匀沉降主要发生在地震瞬时,震后长期沉降虽然显著但相对均匀.结构物对称性对软土地基震陷影响显著,与一维或二维结构相比,三维不对称结构引起了显著的不均匀震陷,该震陷量占地震引起总沉降的一半左右,导致基础呈现出复杂的空间扭转破坏特征.
引文
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5Shamoto Y,Zhang J M,Goto S.Mechanism of large post-liquefaction deformation in saturated sand.Soils Found,1997,37(2):71―80
6袁晓铭,孙锐,孟上九.软弱地基土上建筑物不均匀震陷机理研究.土木工程学报,2004,37(2):67―72
7邓津,王兰民,张振中.黄土显微结构特征与震陷性.岩土工程学报,2007,29(4):542―548
8Matsuda H,Ohara S.Geotechnical aspects of earthquake-induced settlement of clay layer.Mar Geotec,1991,9(3):179―206
9宋波,刘惠珊.软土地基震陷的试验研究.工程抗震,1990,2(1):34―37
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18吕西林,陈跃庆,陈波,等.结构-地基动力相互作用体系的振动台模型试验研究.地震工程与工程振动,2000,20(4):20―29
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25Sato M.A new dynamic geotechnical centrifuge and performance of shaking table tests.In:Leung C F,Lee F H,Tan T S,eds.Cen-trifuge94.Rotterdam:A A Balkema,1994.157―162
26Hushmand B,Scott R F,Crouse C B.Centrifuge liquefaction tests in a laminar box.Geotechnique,1988,38(2):253―262
27陈云敏,周燕国,黄博.利用弯曲元测试砂土剪切模量的国际平行试验.岩土工程学报,2006,28(7):874―880
28Chen Y M,Zhou Y G.Technique standardization of bender elements and international parallel test.ASCE Geotech Special Pub,2006,(150):90―97
29Viggiani G,Atkison J H.Interpretation of bender element tests.Geotechnique,1995,45(1):149―154
30Zhou Y G,Chen Y M.Laboratory investigation on assessing liquefaction resistance of sandy soils by shear wave velocity.J Geotech Geoenviron Eng,2007,133(8):959―972
31Zhou Y G,Chen Y M.Influence of seismic cyclic loading history on small strain shear modulus of saturated sands.Soil Dyn Earthq Eng,2005,25(5):341―353
32Zhou Y G,Chen Y M,Ding H J.Analytical solutions to piezoelectric bimorphs based on improved FSDT beam model.Smart Struct Syst,2005,1(3),309―324
33Fukutake K,Ohtsuki A,Sato M,et al.Analysis of saturated dense sand-structure system and comparison with results from shaking ta-ble test.Earthq Eng Struct Dyn,1990,19(7):977―992
2石兆吉,郁寿松,翁鹿年.塘沽新港地区震陷计算分析.土木工程学报,1988,21(4):24―33
3Lee K L,Albaisa A.Earthquake induced settlements in saturated sands.J Geotech Eng,1974,100(4):387―406
4Tokimatsu K,Seed H B.Evaluation of settlements in sands due to earthquake shaking.J Geotech Eng,1987,113(8):861―878
5Shamoto Y,Zhang J M,Goto S.Mechanism of large post-liquefaction deformation in saturated sand.Soils Found,1997,37(2):71―80
6袁晓铭,孙锐,孟上九.软弱地基土上建筑物不均匀震陷机理研究.土木工程学报,2004,37(2):67―72
7邓津,王兰民,张振中.黄土显微结构特征与震陷性.岩土工程学报,2007,29(4):542―548
8Matsuda H,Ohara S.Geotechnical aspects of earthquake-induced settlement of clay layer.Mar Geotec,1991,9(3):179―206
9宋波,刘惠珊.软土地基震陷的试验研究.工程抗震,1990,2(1):34―37
10Scholl R E.Observations of the performance of buildings during the1985Mexico earthquake,and structural design implications.Geotech Geol Eng,1989,7(1):69―99
11周健,蔡宏英,许朝阳.软粘土地基震陷分析.工程抗震,2000,12(1):40―42
12Mendoza M J,Auvinet G.The Mexico earthquake of September19,1985――Behaviour of building foundations in Mexico City.Earthq Spectra,1988,4(4):835―853
13Yasuhara K,Hyodo M.Seismic induced settlement in a building.In:Prakash S,ed.2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics.Missouri:ASCE,1991.1:365―370
14郁寿松,石兆吉.土壤震陷试验研究.岩土工程学报,1989,1(4):35―44
15Yasuhara K,Murakami S,Toyota N,et al.Settlements of fine grained soils under cyclic loading.Soils Found,2001,41(6):25―36
16Yuan X M,Sun R,Meng S J.Effect of asymmetry and irregularity of seismic waves on earthquake-induced differential settlement of buildings on natural subsoil.Soil Dyn Earthq Eng,2003,23(2):107―114
17孟上九,袁晓铭,孙锐.建筑物不均匀震陷机理的振动台实验研究.岩土工程学报.2002,24(6):747―751
18吕西林,陈跃庆,陈波,等.结构-地基动力相互作用体系的振动台模型试验研究.地震工程与工程振动,2000,20(4):20―29
19Steedman R S,Zeng X.Centrifuges in modelling:Dynamics.In:Taylor R N,ed.Geotechnical Centrifuge Technology.Blackie Aca-demic and Professional,1995.168―195
20张建民,于玉贞,濮家骝,等.电液伺服控制离心机振动台系统研制.岩土工程学报,2004,26(6):843―845
21侯瑜京.土工离心机振动台及其试验技术.中国水利水电科学研究院学报.2006,4(1):15―22
22Fiegel G L,Kutter B L,Idriss I M.Earthquake-induced settlement of soft clay.In:Kimura T,Kusakabe O,Takemura J,eds.Centri-fuge98.Rotterdam:A A Balkema,1998.1:231―236
23Narikawa M,Ohshima Y,Nishimura I,et al.Settlement and seismic behaviour of floating foundations on thick cohesive strata.In:Seco e Pinto,ed.Earthquake Geotechnical Engineering.Rotterdam:A A Balkema,1999.421―426
24Tamura T,Shamoto Y,Hotta H.Post-earthquake residual deformation of cohesive ground and foundation.In:Som N,Madhav M,eds.13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering.Kolkata:Indian Geotechnical Society,2007.617―620
25Sato M.A new dynamic geotechnical centrifuge and performance of shaking table tests.In:Leung C F,Lee F H,Tan T S,eds.Cen-trifuge94.Rotterdam:A A Balkema,1994.157―162
26Hushmand B,Scott R F,Crouse C B.Centrifuge liquefaction tests in a laminar box.Geotechnique,1988,38(2):253―262
27陈云敏,周燕国,黄博.利用弯曲元测试砂土剪切模量的国际平行试验.岩土工程学报,2006,28(7):874―880
28Chen Y M,Zhou Y G.Technique standardization of bender elements and international parallel test.ASCE Geotech Special Pub,2006,(150):90―97
29Viggiani G,Atkison J H.Interpretation of bender element tests.Geotechnique,1995,45(1):149―154
30Zhou Y G,Chen Y M.Laboratory investigation on assessing liquefaction resistance of sandy soils by shear wave velocity.J Geotech Geoenviron Eng,2007,133(8):959―972
31Zhou Y G,Chen Y M.Influence of seismic cyclic loading history on small strain shear modulus of saturated sands.Soil Dyn Earthq Eng,2005,25(5):341―353
32Zhou Y G,Chen Y M,Ding H J.Analytical solutions to piezoelectric bimorphs based on improved FSDT beam model.Smart Struct Syst,2005,1(3),309―324
33Fukutake K,Ohtsuki A,Sato M,et al.Analysis of saturated dense sand-structure system and comparison with results from shaking ta-ble test.Earthq Eng Struct Dyn,1990,19(7):977―992
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