压扭耦合作用下粉砂土的双向动模量与阻尼比研究

doi:10.13722/j.cnki.jrme.2020.0166

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摘要为了研究振动频率和相位差对粉砂土双向动模量和阻尼比的影响，利用空心圆柱扭剪仪进行了一系列轴向与扭转向双向动荷载耦合作用的试验。结果表明：双向动荷载耦合作用下，振动频率和相位差对轴向动应力–应变关系曲线和扭转向的剪应力–应变关系曲线均有一定影响。振动频率和相位差对粉砂土的动剪切模量没有影响，只是相位差= 90°的初始动剪切模量最大。振动频率和相位差对粉砂土动压缩模量有一定影响，同一动应变处的动压缩模量随振动频率的增加先增大后减小，相位差= 0°时动压缩模量最大，= 90°的最小。振动频率对于粉砂土的动剪切阻尼比和动压缩阻尼比均没有影响，但是相位差对动剪切阻尼比和动压缩阻尼比都有较显著的影响，达到相同剪应变时，= 0°和180°时的动剪切阻尼比基本重合且明显高于= 90°的动剪切阻尼比；而相位差= 90°时的动压缩阻尼比在动应变达到0.1%之后增加较快，显著大于其他相位差的阻尼比。

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关键词 ：土力学, 压扭动荷载, 耦合, 粉砂土, 动模量, 阻尼比

Abstract：In order to study the effect of the vibration frequency and the phase difference on the two-way dynamic modulus and the damping ratio of silt sand，a series of tests under the action of compression and torsion coupling were conducted using the hollow cylindrical torsion shear apparatus. The results show that，under the coupling action of two-way dynamic loads，the vibration frequency and the phase difference have certain effects on the axial dynamic stress-strain relationship and the torsional shear stress-strain relationship while no effect on the dynamic shear modulus of silt sand. The initial dynamic shear modulus with the phase difference = 90° is the largest. The vibration frequency and the phase difference have a certain effect on the dynamic compression modulus of silt sand. The dynamic compression modulus at the same dynamic strain increases firstly and then decreases with increasing the vibration frequency. The dynamic compression modulus is respectively the largest and the smallest when he phase difference = 0° and = 90°. The vibration frequency has no effect on the dynamic shear damping ratio and the dynamic compression damping ratio of silt sand，but the phase difference has a significant effect on them. When the same shear strain is reached，the dynamic shear damping ratios when = 0° and = 180° basically coincide with each other and are significantly higher than the dynamic shear damping ratio as = 90°. The dynamic compression damping ratio at a phase difference = 90° increases faster after the dynamic strain reaches 0.1%，significantly greater than the damping ratio of other phase differences.

Key words： soil mechanics compression-torsion dynamic load coupling silt sand dynamic modulus damping ratio

引用本文:

杨利国1，2，邵生俊1，3. 压扭耦合作用下粉砂土的双向动模量与阻尼比研究[J]. 岩石力学与工程学报, 2020, 39(10): 2104-2114.
YANG Liguo1，2，SHAO Shengjun1，3. Bidirectional dynamic modulus and damping ratio of silt sand under compression and torsion coupling actions. , 2020, 39(10): 2104-2114.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0166 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I10/2104

[17]	毕昇，陈国兴，周正龙，等. 细粒含量及固结应力对饱和砂土动剪切模量和阻尼比影响试验研究[J]. 岩土工程学报，2017，39(增1)：48-52.(BI Sheng，CHEN Guoxing，ZHOU Zhenglong，et al. Experimental study on influences of fines content and consolidation stress on shear modulus and damping ratio of saturated sand[J]. Chinese Journal of Geotechnical Engineering，2017，39(Supp.1)：48-52.(in Chinese))
[21]	潘华，陈国兴. 动态围压下空心圆柱扭剪仪模拟主应力轴旋转应力路径能力分析[J]. 岩土力学，2011，32(6)：1 701-1 706.(PAN Hua，CHEN Guoxing. Analysis of capabilities of HCA to simulate stress paths for principal stress rotation under dynamic confining pressure[J]. Rock and Soil Mechanics，2011，32(6)：1 701-1 706.(in Chinese))
[5]	MATEŠI? L，VUCETIC M. Strain-rate effect on soil secant shear modulus at small cyclic strains[J]. Journal of Geotechnical and Geoenvironmental Engineering，2003，129(6)：536-549.
[15]	XU C S，JIA J B，SUN Y L，et al. Cyclic strength of saturated sand under bi-directional cyclic loading[J]. Engineering Geology，2017，227：23-31.
[2]	谷川，蔡袁强，王军. 地震P波和S波耦合的变围压动三轴试验模拟[J]. 岩土工程学报，2012，34(10)：1 903-1 909.(GU Chuan，CAI Yuanqiang，WANG Jun. Coupling effects of P-waves and S-waves based on cyclic triaxial tests with cyclic confining pressure[J]. Chinese Journal of Geotechnical Engineering，2012，34(10)：1 903-1 909.(in Chinese))
[12]	HU X Q，ZHANG Y，GUO L，et al. Cyclic behavior of saturated soft clay under stress path with bidirectional shear stresses[J]. Soil Dynamic and Earthquake Engineering，2018，104：319-328.
[22]	谢定义. 土动力学[M]. 北京：高等教育出版社，2011：279-288.(XIE Dingyi. Soil dynamics[M]. Beijing：Higher Education Press，2011：279-288.(in Chinese))
[3]	WICHTMANN T，NIEMUNIS A，TRIANTAFYLLIDIS T. Strain accumulation in sand due to cyclic loading：drained triaxial tests[J]. Soil Dynamics and Earthquake Engineering，2005，25(12)：967-979.
[13]	栾茂田，金丹，许成顺，等. 双向耦合剪切条件下饱和松砂的液化特性试验研究[J]．岩土工程学报，2008，30(6)：790-794.(LUAN Maotian，JIN Dan，XU Cheng，et al. Liquefaction of sand under bi-directional cyclic loading[J]. Chinese Journal of Geotechnical Engineering，2008，30(6)：790-794.(in Chinese))
[10]	蔡袁强，王军，海钧. 双向激振循环荷载作用下饱和软黏土强度和变形特性研究[J]. 岩石力学与工程学报，2008，27(3)：495-504.(CAI Yuanqiang，WANG Jun，HAI Jun. Study on strength and deformation behaviors of soft clay under bidirectional exciting cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：495-504.(in Chinese))
[20]	付磊，王洪瑾，周景星. 主应力偏角对沙砾料动力特性影响的试验研究[J]. 岩土工程学报，2000，22(4)：435-440.(FU Lei，WANG Hongjin，ZHOU Jingxing. Effect of the initial rotation angle of principal stress on the dynamic properties of soil[J]. Chinese Journal of Geotechnical Engineering，2000，22(4)：435-440.(in Chinese))
[8]	MATSUDA H，HENDRAWAN A P，ISHIKURA R，et al. Effective stress change and post-earthquake settlement properties of granular materials subjected to multi-directional cyclic simple shear[J]. Soils Foundation，2011，51(5)：873-884.
[18]	中华人民共和国行业标准编写组. SL237－1999土工试验规程[S]. 北京：中国水利水电出版社，1999.(The Professional Standards Compilation Group of People's Republic of China. SL237—1999 Specification of soil test[S]. Beijing：China Water and Power Press，1999.(in Chinese))
[1]	沈扬，周建，龚晓南. 主应力轴旋转对土体性状影响的试验进展研究[J]. 岩石力学与工程学报，2006，25(7)：1 408-1 416.(SHEN Yang，ZHOU Jian，GONG Xiaonan. Experimental progress research on influence of principal stress rotation on soils¢ characteristics[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(7)：1 408-1 416.(in Chinese))
[4]	TEACHAVORASINSKUN S，THONGCHIM P. Shear modulus and damping of soft Bangkok clays[J]. Canadian Geotechnical Journal，2002，39(5)：1 201-1 208.
[6]	陈存礼，胡再强. 强夯地基黄土的动力特性参数及其与振动频率的关系[J]. 西安理工大学学报，1998，14(2)：216-220.(CHEN Cunli，HU Zaiqiang. Dynamic characteristics parameters and their relation to vibrofrequency of dynamically-compacted foundation loess[J]. Journal of Xi'an University of Technology，1998，14(2)：216-220.(in Chinese))
[9]	MATSUDA H，NHAN T T，ISHIKURA R. Excess pore water pressure accumulation and recompression of saturated soft clay subjected to uni-directional and multi-directional cyclic simple shears[J]. Journal Earthquake and Tsunami，2013，7(4)：62-78.
[11]	王常晶，陈云敏. 双向循环荷载下饱和软黏土变形特性的试验研究[J]. 土木工程学报，2010，43(增)：573-576.(WANG Changjing，CHEN Yunmin. Experimental study on deformation behavior of saturated soft clay under bidirectional cyclic loading[J]. China Civil Engineering Journal，2010，43(Supp.)：573-576.(in Chinese))
[14]	许成顺，高英，杜修力，等. 双向耦合剪切条件下饱和砂土动强度特性试验研究[J]. 岩土工程学报，2014，36(12)：2 335-2 340. (XU Chengshun，GAO Ying，DU Xiuli，et al. Dynamic strength of saturated sand under bi-directional cyclic loading[J]. Chinese Journal of Geotechnical Engineering，2014，36(12)：2 335-2 340.(in Chinese))
[16]	张希栋，骆亚生，王鹏程. 双向循环荷载耦合下黄土动模量和动变形特性研究[J]. 地震工程学报，2015，37(2)：505-511.(ZHANG Xidong，LUO Yasheng，WANG Pengcheng. Study on dynamic modulus and dynamic deformation characteristics of loess under bidirectional cyclic loading[J]. China Earthquake Engineering Journal，2015，37(2)：505-511.(in Chinese))
[19]	杨利国，骆亚生，李焱，等. 初始应力条件对压实黄土动强度影响的研究[J]. 岩土力学，2010，31(1)：87-91.(YANG Liguo，LUO Yasheng，LI Yan，et al. Research on effect of initial stress conditions on dynamic strength of compacted loess[J]. Rock and Soil Mechanics，2010，31(1)：87-91.(in Chinese))
[7]	李瑞山，陈龙伟，袁晓铭，等. 荷载频率对动模量阻尼比影响的试验研究[J]. 岩土工程学报，2017，39(1)：71-80.(LI Ruishan，CHEN Longwei，YUAN Xiaoming，et al. Experimental study on influences of different loading frequencies on dynamic modulus and damping ratio[J]. Chinese Journal of Geotechnical Engineering，2017，39(1)：71-80.(in Chinese))