全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

循环荷载下结构性软土变形预测

, PP. 13-18

Keywords: 结构性软土,循环荷载,扰动状态,累积塑性变形,循环应力比,动三轴试验

Full-Text   Cite this paper   Add to My Lib

Abstract:

为探讨天津滨海新区典型软土的循环变形特性,采用不排水循环三轴试验,结合扰动状态概念,在考虑土体结构屈服压力基础上,提出了一种能考虑土体在循环荷载作用下结构逐渐破坏的扰动函数,建立了一种反映土体在循环荷载作用下土体结构破坏的塑性变形经验公式,并通过动三轴试验结果对所提经验公式进行了检验。分析结果表明结构性软土在循环荷载作用下产生的累积塑性应变和振动次数的关系分为稳定型和破坏型2种典型情况;累积塑性应变随振动次数的增加而增大;相同的围压作用下,存在一个临界循环应力比,其上限值随着围压的增大而减小。可见,所提经验公式很好反映了土体在交通荷载下的变形特性。

References

[1]  MONISMITH C L, OGAWA N, FREEME C R. Permanent deformation characteristics of subgrade soils due to repeated loading[J]. Transportation Research Record, 1975(537): 1-17.
[2]  LI Ding-qing, SELIG E T. Cumulative plastic deformation for fine-grained subgrade soils[J]. Journal of Geotechnical Engineering, 1996, 122(12): 1006-1013.
[3]  CHAI Jin-chun, MIURA N. Traffic-load-induced permanent deformation of road on soft subsoil[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128(11): 907-916.
[4]  DIYALJEE V A, RAYMOND G P. Repetitive load deformation of cohesionless soil[J]. Journal of the Geotechnical Engineering Division, 1982,108(10): 1215-1229.
[5]  黄茂松,李进军,李兴照.饱和软粘土的不排水循环累积变形特性[J].岩土工程学报,2006,28(7):891-895. HUANG Mao-song, LI Jin-jun, LI Xing-zhao. Cumulative deformation behaviour of soft clay in cyclic undrained tests[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(7): 891-895.(in Chinese)
[6]  崔新壮.交通荷载作用下低路堤软粘土地基累积沉降规律分析[J].中国公路学报,2009,22(4):1-8.CUI Xin-zhuang. Traffic-load-induced cumulative settlement of soft clay subgrade of low road embankment[J]. China Journal of Highway and Transport, 2009, 22(4): 1-8.(in Chinese)
[7]  王 军,蔡袁强.循环荷载作用下饱和软黏土应变累积模型研究[J].岩石力学与工程学报,2008,27(2):331-338. WANG Jun, CAI Yuan-qiang. Study on accumulative plastic strain model of soft clay under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 331-338.(in Chinese)
[8]  颜 斌,倪万魁,刘海松.公路黄土地基流变模型研究[J].中国公路学报,2009,22(4):15-19. YAN Bin, NI Wan-kui, LIU Hai-song. Research on rheological model of highway loess subgrade[J]. China Journal of Highway and Transport, 2009, 22(4): 15-19.(in Chinese)
[9]  程海涛,刘保健,谢永利.重塑黄土变形特性[J].长安大学学报:自然科学版,2008,28(5):31-34. CHENG Hai-tao, LIU Bao-jian, XIE Yong-li. Deformation characteristics of remolded loess[J]. Journal of Chang’an University: Natural Science Edition, 2008, 28(5): 31-34.(in Chinese)
[10]  王国欣,肖树芳,周旺高.原状结构性土先期固结压力与结构强度的确定[J].岩土工程学报,2003,25(2):249-251. WANG Guo-xin, XIAO Shu-fang, ZHOU Wang-gao. Determination of preconsolidation pressure and structural strength of undisturbed structural soils[J]. Chinese Journal of Geotechnical Engineering, 2003, 25(2): 249-251.(in Chinese)
[11]  邹越强,王建斌,邵孟新.推求先期固结压力的逐步逼近法[J].岩土工程学报 1994,16(3):54-61. ZOU Yue-qiang, WANG Jian-bin, SHAO Meng-xin, Ascertaining preconsolidation pressure by lteration[J]. Chinese Journal of Geotechnical Engineering, 1994, 16(3): 54-61.(in Chinese)
[12]  王国欣.软土结构性及其扰动状态模型研究[D].长春:吉林大学,2003. WANG Guo-xin. Study on structural property and disturbed state model of soft soil[D]. Changchun: Jilin University, 2003.(in Chinese)
[13]  陈颖平,黄 博,陈云敏.循环荷载作用下结构性软粘土的变形和强度特性[J].岩土工程学报,2005,27(9):1065-1071. CHEN Ying-ping, HUANG Bo, CHEN Yun-min. Deformation and strength of structural soft clay under cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(9): 1065-1071.(in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133