Article
Materials Science, Paper & Wood
Qiyun Xu, Xinyuan Lan, Muhammad Ali, Yewei Ding, Zheng Wang
Summary: This study measures the elastic constants of falling larch wood using dynamic and static methods, which has significant value in the application of timber as an engineering structural material.
Article
Materials Science, Multidisciplinary
H. Joshi, Tuan V. Vu, Nguyen N. Hieu, R. Khenata, D. P. Rai
Summary: An ab-initio density functional theory (DFT) method was utilized to investigate the elastic and thermodynamic properties of Fe2CoAl under hydrostatic pressure. It was found that the compound exhibits a mixture of covalent and ionic bonds, and shows ductility at all pressures considered, with various mechanical and dynamical properties showing linear changes under different applied pressures.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Construction & Building Technology
Bin Liang, Hai Zhang, Zhongxian Liu, Jilin Hou
Summary: The investigation of masonry buildings in Chinese villages revealed that over 90% of the buildings were made of masonry structures. The use of mortars in these structures has evolved from mud to white clay/slag and eventually to cement. This article highlights the discrepancy in compressive strength between the Chinese standard code and experimental results, prompting the testing of masonry columns with different types of mortars to modify the equations. The research delves into the stress-strain curve, elastic modulus, Poisson's ratio, and compressive strength of masonry columns. The findings indicate that the compressive strength of the masonry increases with the strength of the mortar. The experimental values were 1.2 times higher than the calculated values specified in the code, leading to the proposal of a revised equation for masonry considering stress-strain relationship, elastic modulus, Poisson's ratio, and compressive strength.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Geological
Zhichao Liu, Jongchan Kim, Gaowei Hu, Wei Hu, Fulong Ning
Summary: Understanding the dynamic mechanical properties of hydrate reservoirs is crucial for safe and economic production. The damping ratio increases with hydrate content, aiding in identification. Stress and hydrate enhance modulus, but high saturation dampens stress effects.
ENGINEERING GEOLOGY
(2021)
Article
Materials Science, Characterization & Testing
Zhi Li, Hua Zhang, Zhaoli Lin, Shiyan Li
Summary: In this study, the authors conducted experiments to measure the dynamic Poisson's ratio and dynamic elastic modulus at different positions of five common sugarcane varieties. It was found that the values of the Poisson's ratio were the same at positions LT and LR, but significant differences were observed at position RT. Additionally, there were significant differences in the dynamic elastic modulus measurement between different varieties. The experiments also verified the reliability of the data by measuring the static elastic moduli, which showed consistent values with the dynamic elastic moduli. These findings provide foundational support for mechanical simulation analysis and research on lodging resistance of sugarcane stalks.
RUSSIAN JOURNAL OF NONDESTRUCTIVE TESTING
(2023)
Article
Chemistry, Physical
Qizhu Yang, Ze Xiang, Taoyong Liu, Changqing Deng, Huagang Zhang
Summary: By conducting uniaxial compression tests on cast-in-situ phosphogypsum specimens, the compressive strength, constitutive relationship, elastic modulus, and Poisson's ratio of the material are determined. It is found that cast-in-situ phosphogypsum exhibits brittle properties and mainly undergoes splitting failure when the strain approaches the peak strain. The presence of retarder significantly affects the peak stress. The recommended Poisson's ratio for the material is 0.19.
Article
Engineering, Geological
S. W. Perkins, H. N. Haselton, E. C. Newman
Summary: This paper presents the development of a new biaxial testing procedure to provide load-strain response data necessary to determine in-plane linear elastic tensile properties of geosynthetics. The procedure involves testing key performance indicators such as elastic moduli, Poisson's ratios, and shear modulus, and can be applied to geosynthetics in scenarios involving repetitive load applications.
GEOSYNTHETICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Ning Wang, Qingtian Deng
Summary: This study investigated the elastic properties of irregular honeycomb structures, finding that axial deformation has a significant influence on the structure. The elastic properties of the structure are affected by the enclosed area, shape, and material properties.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Engineering, Geological
Diyuan Li, Bang Li, Zhenyu Han, Quanqi Zhu, Meng Liu
Summary: The study investigated the bi-modularity behavior of different rock materials in uniaxial compression and tension, validated the rationality of tensile elastic constants through experiments, and discussed the characteristics of different types of rocks.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Construction & Building Technology
Chao Liu, Lu Xing, Huawei Liu, Wei Huang, Xiangyun Nong, Xiaoyu Xu
Summary: In this study, self-healing recycled concrete was prepared using recycled aggregate as microbial carrier, and its crack healing capacity and mechanical properties were investigated. The results showed that C-BRC had the best healing capacity, with cracks fully repaired after 28 days of healing.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Geological
X. L. Zhang, Y. Y. Wu, Z. Y. Ma, C. J. Yin
Summary: This study proposes an improved non-contact measurement technology for analyzing the elastic modulus of PVC geomembrane. Strain is measured using digital image correlation, and the variation of Poisson's ratio is discussed to determine the true cross-sectional area and calculate the true stress. The elastic modulus and linear range are established based on the true stress-strain curve.
GEOSYNTHETICS INTERNATIONAL
(2023)
Article
Environmental Sciences
Ting Lu, Wensong Wang, Zuoan Wei, Yonghao Yang, Guansen Cao
Summary: The study found that phosphogypsum exhibits medium compressibility and medium to weak permeability characteristics. Shear strength and deformation modulus significantly increased with increasing dry density and consolidation confining pressure. Liquefaction resistance curves were expressed by power functions, shifting higher and becoming steeper with increasing dry density. The Davidenkov model was found to be more suitable for describing the relationship between the dynamic shear modulus ratio and damping ratio of PG compared to the Hardin-Drnevich model.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Multidisciplinary
Kai Long, Xiaoyu Yang, Nouman Saeed, Zhuo Chen, Yi Min Xie
Summary: This study proposes a methodology to achieve the maximum modulus in elastic composites. By using a topology optimization algorithm and numerical homogenization technique, microstructures close to theoretical upper bounds are found. The research also reveals that the optimized mechanical properties of the composite materials are close to theoretical limits.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2021)
Article
Engineering, Environmental
Supandi Sujatono, Andy Erwin Wijaya
Summary: The quartz mineral content in sandstone has a significant impact on the modulus of elasticity and Poisson's ratio. The study found a strong correlation between quartz content and these properties, with an increase in quartz content leading to higher modulus of elasticity and Poisson's ratio.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Geological
Binghui Song, Angelos Tsinaris, Anastasios Anastasiadis, Kyriazis Pitilakis, Wenwu Chen
Summary: This study examines the small to medium strain dynamic properties of intact and recompacted loess in Lanzhou. The influence of soil structure on the dynamic properties is analyzed, and a normalized correlation is found between G/G0 and gamma/gamma 0.7, which is practically identical for both types of loess.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Zheng Wang, Wenbo Xie, Yao Lu, Haitao Li, Zhiheng Wang, Zhong Li
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Engineering, Multidisciplinary
Huiqi Liang, Wenbo Xie, Zhiqiang Zhang, Peizi Wei, Changhui Cui
Summary: This study investigates the dynamic characteristics of human walking and finds that the 3D dynamic parameters have a significant impact on lateral ground reaction forces. A three-dimensional bipedal walking model is proposed to compensate for the deficiencies of the 2D model.
MATHEMATICAL PROBLEMS IN ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Huiqi Liang, Wenbo Xie, Peizi Wei, Yang Zhou, Zhiqiang Zhang
Summary: In recent years, advances in building materials and construction techniques have inspired the development of large span, light, and flexible structures with low damping. The importance of not purely treating decorative surface layers as additional mass and the significance of modal analysis for evaluating the serviceability of structures are key takeaways from this study.
Article
Chemistry, Multidisciplinary
Wenbo Xie, Huiqi Liang, Peizi Wei, Yang Zhou, Zhiqiang Zhang
Summary: This study conducted dynamic characteristic tests, human-induced vibration response tests, and finite-element modeling on the grandstand of the Suzhou Industrial Park Stadium. The results revealed that the dynamic characteristics of the structure were consistent with the calculated values, and the finite-element modeling was accurate and reasonable. It was also found that the presence of people increased the damping effect of the structure.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Wenbo Xie, Huiqi Liang, Zhiqiang Zhang, Peizi Wei, Yijing Lu
Summary: This paper focuses on the transmission of vibration response of the seismic simulation shaking table system at Southeast University and its effect on the surrounding building. The test results show that some floors exceed the code limits under sinusoidal wave conditions, while all measurement points of the building meet the limit values required for seismic wave excitation. This study can provide a data reference for future shaking table system commissioning and operation.
Article
Chemistry, Multidisciplinary
Huiqi Liang, Wenbo Xie, Peizi Wei, Dehao Ai, Zhiqiang Zhang
Summary: This study investigated the effects of pedestrian-structure interaction on the dynamic properties of structures using the single-degree-of-freedom mass-spring-damping model and field testing methods. The results showed positive correlation between body frequency and walking frequency, as well as negative correlation between body damping ratio and walking frequency. Additionally, there was a negative correlation between pedestrian frequency and weight, but no significant correlation between damping ratio and weight.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Paper & Wood
Wenbo Xie, Zi Wang, Zhiqiang Zhang, Zheng Wang
Summary: The vibrational frequency method was used to measure the elastic modulus of laminated veneer lumber (LVL), and the feasibility of using Weibull distribution to analyze the elastic modulus data of LVL was considered. The results showed that the LVL elastic modulus fit to the three-parameter Weibull distribution, and the calculated probability value was relatively stable.
Article
Materials Science, Paper & Wood
Wenbo Xie, Yewei Ding, Zheng Wang, Zizhen Gao, Tongyue Zhang, Yuhao Zhou, Yuhang He, Xiuling Huang
Article
Materials Science, Paper & Wood
Wenbo Xie, Yao Lu, Zheng Wang, Xiwei Wang, Xiaoli Wu, Zizhen Gao
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
