Article
Forestry
Jozef Mitterpach, Roman Fojtik, Eva Machovcakova, Lenka Kubincova
Summary: This article compares the environmental performance of a cross-prestressed timber-reinforced concrete bridge with a reinforced concrete road bridge using life cycle assessment, and demonstrates the positive environmental performance of the wooden concrete bridge.
Article
Engineering, Civil
Yuye Zhang, Yuhao Li, Wei Fan, Daniel Dias-da-Costa
Summary: This study evaluates the seismic damage of prestressed segmental bridge columns (PSBCs) and establishes a suitable damage model for PSBCs. A framework is proposed to enable quantitative assessment of the seismic damage using both experimental and numerical analyses of PSBCs. The study develops an improved damage model based on the Park-Ang model, incorporating residual displacement and cumulative energy dissipation. Numerical simulations and statistical analysis of 40 specimens are conducted to obtain empirical equations for the combination coefficient. The proposed model is verified through quasi-static loading tests, demonstrating good agreement with the damage development process in tested PSBCs.
Article
Chemistry, Multidisciplinary
Pierclaudio Savino, Francesco Tondolo, Donato Sabia, Antonino Quattrone, Fabio Biondini, Gianpaolo Rosati, Mattia Anghileri, Bernardino Chiaia
Summary: An experimental research program was conducted to investigate the behavior and performance of 50-year-old prestressed concrete bridge girders. The results showed a uniform behavior of the girders under both service and ultimate conditions, and a non-ductile behavior was observed during the failure mechanism. These experimental findings are expected to contribute to the life-cycle safety assessment of existing bridges by providing validated data and models.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Giulia Marasco, Federico Oldani, Bernardino Chiaia, Giulio Ventura, Fabrizio Dominici, Claudio Rossi, Franco Iacobini, Andrea Vecchi
Summary: This paper presents a structural health monitoring approach for railway bridges, which utilizes machine learning techniques to build regression correlation models based on recorded static quantities and environmental measurements. The approach can effectively identify early-stage anomalies and reduce false alarms.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Construction & Building Technology
Matthew J. Fox, Marco Furinghetti, Alberto Pavese
Summary: The Italian road network has many old bridges that are close to or have exceeded their intended design lives, leading to severe degradation and increased collapse incidents, especially in prestressed concrete construction. In response, the Ministry of Transport and Infrastructure published new guidelines in 2020 for assessment and monitoring to improve the reliability of existing Italian bridges. This article critically reviews the guidelines through a multilevel assessment of a case-study bridge, identifying four areas for potential improvement in future revisions.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Matthew J. Fox, Marco Furinghetti, Alberto Pavese
Summary: The Italian road network consists of bridges built in the mid-20th century that are now approaching or surpassing their intended design lives. Many of these bridges have deteriorated significantly and have been a contributing factor in recent collapses, particularly in prestressed concrete construction. In response to the need for improved reliability, the Ministry of Transport and Infrastructure published new assessment and monitoring guidelines in 2020. This article critically reviews the guidelines through a multilevel assessment of a case-study prestressed concrete road bridge, identifying four key areas for potential improvement in future revisions.
STRUCTURAL CONCRETE
(2023)
Article
Engineering, Civil
Omid Khandel, Mohamed Soliman, Royce W. Floyd, Cameron D. Murray
Summary: Structural health monitoring activities are crucial for realistically characterizing the performance levels of bridge structures throughout their service life. Fiber optic sensors offer accurate real-time data and are ideal for extracting strain and temperature data from bridge components. This paper presents a statistical damage detection and localization approach using fiber Bragg grating sensors to evaluate the performance of prestressed concrete bridge girders.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2021)
Article
Construction & Building Technology
Sanggoo Kang, Yin Chao Wu, Dafnik Sarilkuma David, Suyun Ham
Summary: We demonstrate an automated system for evaluating cracks in concrete structures. By using an automatic impactor and air-coupled sensors, we are able to generate and detect reliable mechanical waves, which overcomes limitations of existing rapid damage assessment methods. Laboratory and field tests show that the proposed system performs well in detecting and characterizing cracks.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Engineering, Civil
Hu Jun-hua, Deng Yong-jun, Jiao Wen-jun, Yao Yong, Chen Dai-guo
Summary: Combined with model experiments and numerical simulations, the dynamic response of a 1:10 scaled T-shaped simply supported girder bridge under the contact explosion was researched. Typical failure modes, overpressure distribution, and acceleration response characteristics of the bridge were analyzed. Damage distribution and a classification method for the damage degree of each area of the bridge deck were proposed. The research results provide a reference for post-blast damage assessment of prestressed T-shaped simply supported girder bridges.
Article
Engineering, Civil
Dario De Domenico, Davide Messina, Antonino Recupero
Summary: This paper presents a systematic approach for the quality control and safety assessment of existing bridge decks through combined field tests and numerical simulation. The proposed procedure provides a reliable tool for the quality control and safety assessment of other similar existing bridges.
Article
Automation & Control Systems
Chen Wei, Shouxu Song, Xiang Li, Yongting Tian
Summary: The oxidation behavior of work rolls in hot rolling greatly affects the quality of rolled products and roll consumption. Monitoring and evaluating the oxidation states of work rolls in service using non-contact nondestructive inspection technology is of great significance. This study simulated the oxidation process of high-speed steel work rolls in real hot rolling conditions and revealed the interaction mechanism between oxidation and wear. A pulsed eddy current nondestructive inspection system was designed to evaluate different oxidation states of work rolls, and a method using variational mode decomposition and Hilbert transformation was proposed for accurate oxidation monitoring.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Characterization & Testing
Saman Rashidyan, Tang-Tat Ng, Arup Maji
Summary: Investigations using numerical models have shown that the SE method faces challenges in determining the depth of fully buried piles. While it may be possible to determine the location of the pile toe when the pile cap height is less than 1 m, this conclusion is uncertain due to the absence of surrounding soil damping.
RESEARCH IN NONDESTRUCTIVE EVALUATION
(2021)
Article
Construction & Building Technology
Qi Xia, Yi-chen Zhou, Yu-yao Cheng, Jian Zhang
Summary: This study proposes a novelty detection method based on impact vibration testing to rapidly perform the quantitative assessment of the working condition of the hinge joints. The relationship between hinge joint performance and lateral load distribution (LLD) is first derived in detail by theoretical analysis. The effectiveness of the proposed method is verified through a multibeam model using ABAQUS software, and the lateral collaborative working relationship between slabs is simulated using the connector elements.
STRUCTURAL CONTROL & HEALTH MONITORING
(2023)
Article
Engineering, Civil
Xiao Ge, Nicholas A. Alexander, Mohammad M. Kashani
Summary: This study explores the role of signal-based nonlinear system identification methods in the rapid post-earthquake damage assessment of reinforced concrete bridge piers. By using accelerations to estimate the instantaneous frequency and combining the Wigner-Ville distribution and Hilbert transform, the robustness of the Hilbert transform for damage detection could be significantly improved through modal filtering and thresholding.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2021)
Article
Engineering, Civil
Alain Saroufim, Moussa A. Issa, Mohsen A. Issa
Summary: Many countries face aging bridge infrastructure and aim to make efficient use of existing facilities. Proof load testing (PLT) using IoT technology and Finite Element Modeling provides a reliable method to assess the bridge condition and optimize outcomes. The case study of the I-39 Kishwaukee bridge illustrates the successful combination of field testing data and Finite Element Modeling to strengthen the bridge and accommodate future traffic increases.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
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)