Abstract
AbstractWe studied the non-linear mechanical response and failure mechanism of columnar jointed basalts (CJBs) with transverse joints by modeling meso-mechanics, statistical damage theory and continuum mechanics. The anisotropy and shape effect of CJBs with transverse joints were captured under different lateral pressures. The digital images were transformed into heterogeneous element meshes, and the gradual fracturing process and various failure modes of CJBs were reproduced. The compressive strength (CS) and equivalent deformation modulus (EDM) of CJBs parallel and perpendicular to the column axis were studied. The results show that the U-shaped CS curve of CJB appears as the column dip angle increases, and the CS is obviously improved as the lateral pressure increases when the column dip angle is 0°–90°. When the shape of CJB changes from 6 m × 3 m, 3 m × 3 m to 1.5 m × 3 m, the CS continues to increase. Meanwhile, the transverse joints are proven to be critical for determining the mechanical properties of CJBs at the certain dip angles of columns. However, the high lateral pressure can reduce the CS difference between the CJBs with and without the transverse joints. Besides, as the elastic modulus of joints rises, the CS will grow up, and the EDM will increase first and then almost remain at the same level. The coefficient of rock residual strength has a great influence on the CS at the certain dip angles of columns. Additionally, the model boundary significantly affects the anisotropy and shape effect of mechanical properties of CJBs under compression. These conclusions will improve our knowledge of the failure mechanisms and failure patterns of CJBs containing transverse joints.
Funder
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Publisher
Springer Science and Business Media LLC
Subject
Geology,Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering
Reference46 articles.
1. Chen BP, Gong B, Wang SY, Tang CA (2022) Research on zonal disintegration characteristics and failure mechanisms of deep tunnel in jointed rock mass with strength reduction method. Mathematics 10(6):922
2. Cui Z, Sheng Q, Leng XL (2015) Study on structural effect of equivalent elastic modulus of columnar jointed rock mass. In: Proceedings of the 3rd International Conference on Machinery, Materials and Information Technology Applications, Atlantis Press. p 1599–1607
3. Cui Z, Wei Q, Hou J, Sheng Q, Li LQ (2016) Structural effect on equivalent modulus of deformation of columnar jointed rock mass with jointed finite element method. Rock Soil Mech 37(10):2921-2928+2936
4. Fan QX, Wang ZL, Xu JR, Zhou MX, Jiang Q, Li G (2018) Study on deformation and control measures of columnar jointed basalt for Baihetan super-high arch dam foundation. Rock Mech Rock Eng 51:2569–2595
5. Feng XH, Gong B, Tang CA, Zhao T (2022) Study on the non-linear deformation and failure characteristics of EPS concrete based on CT-scanned structure modelling and cloud computing. Eng Fract Mech 261:108214
Cited by
14 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献