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Buildings
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Numerical Analysis on Concrete and Rocks
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Numerical Analysis on Concrete and Rocks

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 5528

Special Issue Editors

Dr. Xiang Li

E-Mail Website
Guest Editor
School of Civil Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Interests: numerical simulation; lifetime prediction; rock fracture; thermal shock in rocks; rock mechanics
Special Issues, Collections and Topics in MDPI journals
Dr. Kewei Liu

E-Mail Website
Guest Editor
School of Resources and Safety Engineering, Central South University, Changsha 410010, China
Interests: structural dynamic response and damage analysis; engineering static and dynamic numerical calculation and simulation; constitutive relationship of rock and soil materials; blasting analysis of geotechnical engineering; rock mechanics and engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Concretes and rocks are two of the traditional materials that serve as the main load-bearing constituents of a large number of building structures. The knowledge of the mechanics of the concretes and rocks is not only important for the buildings aboveground but is also beneficial to underground works in the field of geotechnical and mining engineering. Related projects include slopes, shafts, tunnels, radioactive waste disposal, open-pit mines and underground mines, etc. Thanks to the rapid development of computer techniques, numerical analysis has now been largely adopted to tackle the problems and verify the theories in the aforementioned domains, which would have been impossible a few years before. Today, the application of numerical methods in exploring the mechanisms of the mechanical behavior of building materials (such as concretes and rocks) continues to evolve and attract attention and is worthy of further study.

The Special Issue aims to gather original research work related to the numerical analysis of the concretes and rocks utilized in various building structures. Contributions focusing on innovative numerical algorithms, numerical implementation of constitutive models, computer modelling of lab tests and application of numerical models in engineering works are most welcome.

Dr. Xiang Li
Dr. Kewei Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Buildings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rock mechanics
  • concrete
  • numerical analysis
  • constitutive model
  • fracture process
  • lifetime prediction
  • time-dependent behavior
  • thermo-mechanics
  • geotechnical engineering
  • mining engineering

Published Papers (4 papers)

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Research

15 pages, 4564 KiB  
Article
Damage Effect of Thermal Shock on the Heated Granite at Different Cooling Rates
by Xiang Li, Xiaodong Fan, Ming Tao, Tubing Yin and Si Huang
Buildings 2023, 13(3), 629; https://doi.org/10.3390/buildings13030629 - 27 Feb 2023
Viewed by 1156
Abstract
This study investigates the affecting pattern of cooling rates on the physical and mechanical properties of granite at high temperature. The different cooling rates are realized by cooling the heated granite specimens in the air at room temperature, −60 °C, and −100 °C. [...] Read more.
This study investigates the affecting pattern of cooling rates on the physical and mechanical properties of granite at high temperature. The different cooling rates are realized by cooling the heated granite specimens in the air at room temperature, −60 °C, and −100 °C. Slow cooling in the unplugged furnace is also performed on an additional set of specimens as a reference group. Physical and mechanical tests are performed on the granite specimens after thermal shock treatments. The results indicate a decreasing trend of the dry density, P-wave velocity, strength, and fracture toughness, and an increasing trend of the porosity, as the heating level or the cooling rate ascends. The microscopic observation on the fracture surface of the tested specimens manifests the deteriorating effect of thermal shock with a higher cooling rate, where the transition from trans-granular and intra-granular fracturing to intergranular fracturing serves to explain the variation pattern of the properties obtained in the lab tests. Full article
(This article belongs to the Special Issue Numerical Analysis on Concrete and Rocks)
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14 pages, 3594 KiB  
Article
Numerical Simulation of Concrete Attacked by Sulfate under Drying–Wetting Cycles Coupled with Alternating Loads
by Bowen Guan, Shuowen Zhang, Faping Wang, Jiayu Wu and Lingyun Li
Buildings 2023, 13(1), 82; https://doi.org/10.3390/buildings13010082 - 29 Dec 2022
Viewed by 1284
Abstract
Concrete structures such as rigid pavements, tunnels, and runways at airports are usually subject to fatigue traffic loading during their service life. Research on the aftereffects of drying–wetting cycles coupled with alternating loads on concrete erosion in saline–alkali and coastal areas is of [...] Read more.
Concrete structures such as rigid pavements, tunnels, and runways at airports are usually subject to fatigue traffic loading during their service life. Research on the aftereffects of drying–wetting cycles coupled with alternating loads on concrete erosion in saline–alkali and coastal areas is of considerable practical importance. For this study, we utilized specimens of dimensions 100 mm × 100 mm × 400 mm with strength ratios of C30, C40, and C50. We incubated the concrete samples in a 24 h/24 h drying–wetting cycle with sodium sulfate solutions of different concentrations as we applied alternating loads. We conducted ultrasonic wave velocity tests every 30 days from the 60th day of the experiment to determine the change in the sound velocity of the concrete over the course of 360 days. In addition, we examined the invasion depth of SO42− with time. Based on the change in sound velocity, we developed the damage degree function, and we modified the diffusion coefficient of SO42− in concrete in accordance with the coupling of drying–wetting cycles and alternating loads. We conducted a simulation on SO42− penetration depth, and the results were in reasonable agreement with those obtained by experimental testing. Full article
(This article belongs to the Special Issue Numerical Analysis on Concrete and Rocks)
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18 pages, 36868 KiB  
Article
Study on Shear Mechanical Properties and Microscopic Failure Mechanism of Dentate Joints Based on DEM and Laboratory Tests
by Jiaqi Guo, Lipan Cheng, Yongbiao Lai, Yongchao Tian and Lu Li
Buildings 2022, 12(9), 1485; https://doi.org/10.3390/buildings12091485 - 19 Sep 2022
Cited by 4 | Viewed by 1561
Abstract
The stability control of the surrounding rock is greatly influenced by the rock joint’s shear mechanical characteristics and deformation failure mechanism. A numerical model of the dentate joints was created using a particle flow discrete element method (DEM). To study the shear mechanical [...] Read more.
The stability control of the surrounding rock is greatly influenced by the rock joint’s shear mechanical characteristics and deformation failure mechanism. A numerical model of the dentate joints was created using a particle flow discrete element method (DEM). To study the shear mechanical behavior and damage evolution characteristics of the joints, a numerical simulation of the joints shear test under the same normal stress was conducted. Additionally, the joints’ shear failure mechanism and failure mode were investigated from a microscopic perspective in conjunction with laboratory tests. The results show that the shear strength steadily increases as the roughness of the rock joints increases and that it rapidly decreases after reaching its peak shear strength, indicating an obvious brittle failure. Varied rock joints exhibit significantly different micro-crack evolution, with rougher rock joints (r = 0.30, r = 0.37) exhibiting greater micro-crack production and crack extension into the model’s interior. Rock joint specimens with lower roughness (r = 0.17) had less concentration and fewer areas of contact force concentration. The shear failure mode of the rock joints gradually shifts from abrasion failure mode to snip failure mode as the roughness rises, which is largely compatible with the failure characteristics shown in the laboratory testing. The pattern of micro-crack development within the model specimen and the failure characteristics of the laboratory tests are in good agreement with the distribution characteristics of contact force on the rock joints. Full article
(This article belongs to the Special Issue Numerical Analysis on Concrete and Rocks)
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14 pages, 5451 KiB  
Article
AdaBoost-Based Back Analysis for Determining Rock Mass Mechanical Parameters of Claystones in Goupitan Tunnel, China
by Hongbo Zhao, Lin Zhang, Jiaolong Ren, Meng Wang and Zhiqiang Meng
Buildings 2022, 12(8), 1073; https://doi.org/10.3390/buildings12081073 - 22 Jul 2022
Cited by 4 | Viewed by 1003
Abstract
The back analysis is an effective tool to determine the representative values of rock mass mechanical properties in rock engineering. The surrogate model is widely used in back analyses since analytical or numerical models are usually unavailable for practical engineering problems. This study [...] Read more.
The back analysis is an effective tool to determine the representative values of rock mass mechanical properties in rock engineering. The surrogate model is widely used in back analyses since analytical or numerical models are usually unavailable for practical engineering problems. This study proposes a novel back analysis framework by adopting the AdaBoost algorithm for deriving the surrogate model. Moreover, the simplicial homology global optimization (SHGO) algorithm, which is robust and applicable for a black-box global problem, is also integrated into the framework. To evaluate the performance, an experimental tunnel in Goupitan Hydropower Station, China, is introduced, and the representative rheological properties of the surrounding rock are obtained by applying the proposed framework. Then the computed displacements based on the acquired properties via both surrogate and numerical models are compared with field measurements. By taking triple-day data, the discrepancy between the calculated and field-measured displacements is less than 0.5 mm This validates the reliability of the obtained properties and the feasibility of the proposed framework. As an AdaBoost-based method, the proposed framework is sensitive to noise and outliers in the data, the elimination of which is recommended before application. Full article
(This article belongs to the Special Issue Numerical Analysis on Concrete and Rocks)
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