|
|
|
| Impact of displacement amplitude and frequency on the cyclic shear characteristics of residual soil-concrete interfaces |
| REN Yu1, MA Kechao2, LIU Feiyu2* |
(1. Shanghai Nuclear Engineering Research and Design Institute Co., Ltd., Shanghai 200233, China;
2. College of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China)
|
|
|
|
|
Abstract The mechanical behavior of the granite residual soil-concrete interface is critical to the overall stability and safety of geotechnical structures. To investigate the effects of shear amplitude and shear frequency on the cyclic shear characteristics of granite residual soil-concrete interfaces, a series of large-scale horizontal cyclic direct shear tests were conducted, varying shear amplitudes (1, 3, 6 and 9 mm) and shear frequencies (0.1, 0.5, 1 and 2 Hz). Key parameters, including shear stress-displacement response, maximum shear stress, and vertical displacement, were analyzed. The results indicate that maximum shear stress increases with shear amplitude, although the growth rate gradually decreases. Significant changes in vertical displacement primarily occur within the first 20 cycles, after which it stabilizes, reflecting the particle rearrangement effects during the initial cycles. Shear stiffness decreases at higher shear amplitudes, while the damping ratio exhibits a fluctuating trend, suggesting that the energy dissipation mechanism of the soil is influenced by shear amplitude. Numerical simulations further reveal that, as the number of cycles increases, the number of force chains within the soil also rises, with most force chains consisting of three particles. The principal directions of normal and tangential contact forces are closely related to the shear direction, with the principal direction deflecting approximately 35° in response to changes in shear direction.
|
|
|
|
|
|
[1] NIU X R，XIE H Y，SUN Y F，et al. Basic physical properties and mechanical behavior of compacted weathered granite soils[J]. International Journal of Geomechanics，2017，17(10)：04017082.
[2] WANG X，CHENG H，YAN P，et al. The influence of roughness on cyclic and post-cyclic shear behavior of red clay-concrete interface subjected to up to 1 000 cycles[J]. Construction and Building Materials，2021，273：121718.
[3] DOU H Q，XIE S H，CHEN F，et al. Study on shear characteristics and a mechanics model of granite residual soil-rock interface[J]. Bulletin of Engineering Geology and the Environment，2023，82(6)：212.
[4] 刘世奥，廖晨聪，陈锦剑，等. 饱和砂土–结构物接触面强度特性的三轴试验方法[J]. 上海交通大学学报，2021，55(11)：1 371–1 379. (LIU Shiao，LIAO Chencong，CHEN Jinjian，et al. Triaxial test method for strength characteristics of saturated sand-structure interface[J]. Journal of Shanghai Jiao Tong University，2021，55(11)：1 371–1 379.(in Chinese))
[5] 卢 川，李 飒，刘 鑫，等. 钙质砂剪切强度的单剪试验研究[J]. 地下空间与工程学报，2024，20(6)：1 904–1 912.(LU Chuan，LI Sa，LIU Xin，et al. Study on shear strength of calcareous sand by simple shear test[J]. Chinese Journal of Underground Space and Engineering，2024，20(6)：1 904–1 912.(in Chinese))
[6] ZENG W X，LIU F Y，YING M J. Test and DEM study on cyclic hysteresis characteristics of stereoscopic geogrid-soil interface[J]. Geotextiles and Geomembranes，2024，52(2)：196–208.
[7] TANG L，LI Y，YU Y，et al. Strength deterioration mechanism of interface between soil-rock mixture and concrete with different degrees of roughness under freeze-thaw cycles[J]. Journal of Cold Regions Engineering，2024，38(4)：4024029.
[8] YING M，WANG J，LIU F，et al. Analysis of cyclic shear characteristics of reinforced soil interfaces under cyclic loading and unloading[J]. Geotextiles and Geomembranes，2022，50(1)：99–115.
[9] ZHANG S，LIU F，YING M，et al. Test and prediction for the shear behavior of the sand-irregular concrete interface under constant and dynamic normal loading[J]. Soil Dynamics and Earthquake Engineering，2024，180：108620.
[10] LIU F，GAO C，XU J，et al. Cyclic shear behavior and BoBiLSTM-based model for soil-rock mixture-concrete interfaces[J]. Construction and Building Materials，2024，426：136031.
[11] CHEN W B，ZHOU W H，YIN Z Y. Recent development on macro-micro mechanism of soil-structure interface shearing through DEM[J]. Archives of Computational Methods in Engineering，2022，30(3)：1 843–1 862.
[12] FANG H，WANG W. A three-dimensional multishear bounding surface model of granular soil-structure interfaces under monotonic and cyclic loading[J]. Journal of Engineering Mechanics，2020，146(7)：04020068.
[13] ZHOU W H，JING X Y，YIN Z Y，et al. Effects of particle sphericity and initial fabric on the shearing behavior of soil-rough structural interface[J]. Acta Geotechnica，2019，14(6)：1 699–1 716.
[14] 杨忠平，赵亚龙，胡元鑫，等. 块石强度对土石混合料剪切特性的影响[J]. 岩石力学与工程学报，2021，40(4)：814–827.(YANG Zhongping，ZHAO Yalong，HU Yuanxin，et al. The influence of rock strength on the shear characteristics of soil-rock mixture[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(4)：814–827.(in Chinese))
[15] 刘飞禹，马克超，杨 军. 残积土含水率和混凝土表面粗糙度对界面剪切特性影响[JOL]. 工程科学与技术，http：//kns.cnki.net/kcms/ detail/51.1773.TB.20240601.2158.003.html.(LIU Feiyu，MA Kechao，YANG Jun. The influence of moisture content of residual soil and surface roughness of concrete on interfacial shear characteristics[JOL]. Advanced Engineering Sciences，http：//kns.cnki.net/kcms/detail/ 51.1773.TB.20240601.2158.003.html. (in Chinese))
[16] PEI T，QIU T. DEM investigation of energy dissipation at particle contacts in granular soil under cyclic torsional shear[J]. International Journal of Geomechanics，2022，22(4)：04022016.
[17] HUANG M S，CHEN Y W，GU X Q. Discrete element modeling of soil-structure interface behavior under cyclic loading[J]. Computers and Geotechnics，2019，107：14–24.
[18] LIU F Y，MA K C，YU W. Numerical simulation and experimental analysis of granite residual soil-concrete interface under cyclic shear[J]. Geomechanics and Engineering，2024，39(3)：305–316.
[19] BARTON N，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics，1977，10：1–53.
[20] 刘飞禹，何江荟，曾威翔. 不同含水率下残积土–织物界面动力剪切特性研究[J]. 中国公路学报，2024，37(6)：57–65.(LIU Feiyu，HE Jianghui，ZENG Weixiang. Dynamic shear characteristics of residual soil-geotextile interface under different water contents[J]. China Journal of Highway and Transport，2024，37(6)：57–65.(in Chinese))
[21] 冯大阔，侯文峻，张建民. 切向应力控制条件下粗粒土与结构接触面三维循环特性研究[J]. 岩石力学与工程学报，2011，30(12)：2 574–2 582.(FENG Dakuo，HOU Wenjun，ZHANG Jianmin，et al. Study on three-dimensional cyclic characteristics of contact surface between coarse-grained soil and structure under tangential stress control[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(12)：2 574–2 582.(in Chinese))
[22] ZHANG S X，LIU F Y，ZENG W X，et al. Analyzing cyclic shear behavior at the sand-rough concrete interface：An experimental and DEM study across varying displacement amplitudes[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2024，48(7)：1 907–1 928.
[23] PETERS J F，MUTHUSWAMY M，WIBOWO J，et al. Characterization of force chains in granular material[J]. Physical Review E，2005，72(4)：041307.
[24] FU L L，ZHOU S H，GUO P J，et al. Induced force chain anisotropy of cohesionless granular materials during biaxial compression[J]. Granular Matter，2019，21(3)：52.
[25] ROTHENBURG L，BATHURST R J. Analytical study of induced anisotropy in idealized granular materials[J]. Geotechnique，1989，39(4)：601–614. |
|
|
|
2026, Vol. 45 
