Article
Engineering, Civil
Amry Dasar, Dahlia Patah, Hidenori Hamada, Daisuke Yamamoto, Yasutaka Sagawa
Summary: This study experimentally evaluated the life performance of 40-year-old RC beams with different concrete cover depths and tensile bar diameters. The findings are important for the design, service, and life assessment of RC structures. The results show that a concrete cover depth of 50 mm can meet the design service life of 50 years.
Article
Construction & Building Technology
Julian Carrillo, Juan D. Vargas, Sergio M. Alcocer
Summary: The behavior of fiber reinforced concrete depends on the characteristics of both the concrete matrix and fibers, with an increase in the number of hooked ends contributing to the tensile strength of concrete. Various codes and standards permit the use of steel fiber reinforced concrete for different applications, and research has shown its suitable performance in different structural elements and seismic rehabilitation. Adequate use of steel fiber reinforced concrete relies on knowledge and prediction of its tensile performance.
STRUCTURAL CONCRETE
(2021)
Article
Construction & Building Technology
Vincent Oettel, Markus Schulz, Michael Haist
Summary: When designing steel fiber-reinforced concrete, it is important to specify the residual flexural strength values as fundamental properties. Establishing the relationship between these values and the required dosage of steel fibers can be challenging. This study analyzed existing approaches and developed an improved method for determining the residual flexural strength values of steel fiber-reinforced concrete.
STRUCTURAL CONCRETE
(2022)
Article
Chemistry, Physical
Hafsa Jamshaid, Rajesh Kumar Mishra, Ali Raza, Uzair Hussain, Md. Lutfor Rahman, Shabnam Nazari, Vijay Chandan, Miroslav Muller, Rostislav Choteborsky
Summary: This paper presents experimental research on the mechanical characteristics of concrete reinforced with natural cellulosic fibers. The study found that the tensile and compressive strength of concrete increased with the addition of natural fibers, up to a certain proportion. However, a further increase in fiber loading resulted in a deterioration of the mechanical properties. Using jute and sisal fibers, a significant improvement in strength was observed by adding 2% fibers to the concrete mix. Bending strength increased up to a certain fiber loading, but decreased beyond that due to cracks at the fiber-concrete interface. The impact performance gradually improved with the addition of natural fibers up to 2%. The water absorption capacity of the reinforced concrete decreased, but increased with the loading percent of fibers. The study concludes that natural fiber reinforced concrete can be a sustainable construction material for future use in pavements and flooring slabs.
Article
Engineering, Civil
Julian Carrillo, Diego Torres, Hector Guerrero
Summary: The study aims to establish correlations between SFRC's strength and toughness test results, finding that strength correlations between 4PBT and DPT can be used for SFRC with varying compressive strength. The results indicate that the prediction provides conservative and close to measured values.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Iftekhair Ibnul Bashar, Phillip Visintin, Abdul Hamid Sheikh
Summary: This study investigates the effect of corrosion on the tensile strength of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) using direct tensile tests. The results indicate that even with fiber corrosion, the impact on the tensile performance of the material is minimal. Uncracked specimens actually show a significant increase in tensile strength when exposed to a corrosive environment.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Julian Carrillo, Juan D. Vargas, Orlando Arroyo
Summary: This study compared the design of SFRC using different standards, evaluated the residual strength performance of 3PBT and 4PBT, and considered the effects of dosage, number of hook ends, and tensile strength of the steel fibers. A model was proposed to correlate the residual tensile performance of SFRC measured using tests procedures prescribed by European and US standards.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Gilbert Sebastiano Gondokusumo, Akshay Venkateshwaran, Shan Li, J. Y. Richard Liew
Summary: The residual flexural tensile strength of steel fibre reinforced concrete (SFRC) at elevated temperature was investigated. Sixty prism specimens of SFRC with different fibre contents were heated and tested for flexural tensile strength. A drop in strength was observed with increased temperature. Empirical equations were proposed to predict the residual flexural tensile strength with a high accuracy. This study provides a basis for predicting the performance of SFRC structural members under fire conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Minghong Qiu, Xudong Shao, Yanping Zhu, Husam H. Hussein, Yeping Liu
Summary: This study presents a proposed ultrahigh performance concrete (UHPC) grouted sleeve connection for assembled pre-cast elements, aiming to reduce defects, enhance durability, and accelerate construction. Tensile and flexural tests were conducted to evaluate the performance of the connection, and strain changes in different parts were analyzed. The results show that the UHPC grouted sleeve connection performs well in precast elements.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Minghong Qiu, Xudong Shao, Yanping Zhu, Husam H. Hussein, Yeping Liu
Summary: This study introduces an ultrahigh performance concrete grouted sleeve connection for assembled precast elements, which can reduce defects, enhance durability, and accelerate structure construction. Tensile and flexural tests were conducted to investigate the performance of the connection with different grouting materials, rebar diameters, and anchoring lengths. The study provides valuable insights for the design of the UHPC grouted sleeve connection for assembled precast elements.
STRUCTURAL CONCRETE
(2023)
Article
Engineering, Marine
Hua-Peng Chen, Yu Jiang, George Markou
Summary: This paper investigates the impact of rebar corrosion on marine reinforced concrete (RC) structures and proposes new analytical models for predicting the residual bearing capacity of corroded RC columns. The study also analyzes the influence of corrosion damage location, load condition, and in-service environment on structural performance.
Article
Engineering, Mechanical
Ruixia Zhang, Weidong Zhao, Hao Zhang, Wenjing Yang, Guo-Xiang Wang, Yalin Dong, Chang Ye
Summary: The study showed that the fatigue performance of pre-corroded 7075-T651 aluminum alloy can be rejuvenated through ultrasonic nanocrystal surface modification (UNSM), increasing the fatigue life by twenty times compared to corroded specimens. This improvement is attributed to the repair of the corroded surface layer, surface workhardening, and beneficial compressive residual stress induced by UNSM.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Construction & Building Technology
Kumar Avadh, Punyawut Jiradilok, John E. Bolander, Kohei Nagai
Summary: This study utilizes a 3D Rigid Body Spring Model to investigate the effects of concrete cover thickness and stirrup confinement on internal crack evolution and pull-out behavior in corroded reinforced concrete models. Thicker cover delays crack initiation but increases crack opening rate, while stirrups restrict crack growth effectively. The simulation results also show reductions in pull-out capacity, stiffness, and ductility with increasing corrosion damage.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Anh-Thang Le, An Le Hoang
Summary: This study investigates the variation of tensile strength in high-performance concrete (HPC) through various tensile tests and compares the results of different fiber reinforcement methods. The average tensile strength of bending and splitting tensile tests is significantly higher, and the results of splitting and flexural tensile tests follow a normal distribution.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Mechanics
Jacopo Donnini, Giovanni Lancioni, Gianluca Chiappini, Valeria Corinaldesi
Summary: This study investigated the uniaxial tensile behavior of soft cast UHPFRC by varying the amount of hooked steel fibers, using direct tensile tests and Digital Image Correlation. Numerical simulations with a phase-field model were conducted to better understand the effects of different fiber dosages on the mechanical behavior of UHPFRC composites. The study successfully replicated various failure mechanisms observed in experiments, including ductile failure with high fiber dosage.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Chantal Chalhoub, Raoul Francois, David Garcia, Stephane Laurens, Myriam Carcasses
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2020)
Article
Construction & Building Technology
Chantal Chalhoub, Raoul Francois, Myriam Carcasses
CEMENT AND CONCRETE RESEARCH
(2020)
Article
Construction & Building Technology
Wulong Zhang, Raoul Francois, Yuxin Cai, Jean-Philippe Charron, Linwen Yu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Yuxin Cai, Wulong Zhang, Linwen Yu, Mengzhu Chen, Changhui Yang, Raoul Francois, Kai Yang
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Chantal Chalhoub, Raoul Francois, Myriam Carcasses
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Computer Science, Interdisciplinary Applications
Grigor Angjeliu, Dario Coronelli, Giuliana Cardani
COMPUTERS & STRUCTURES
(2020)
Article
Construction & Building Technology
Yuxin Cai, Wulong Zhang, Changhui Yang, Raoul Francois, Linwen Yu, Mengzhu Chen, Hang Chen, Huan Yang
Summary: The study introduced a new experimental method called chloride penetration depth test to evaluate the chloride permeability along the steel-concrete interface. By using this method on two types of concrete with different stability, the researchers found that the chloride penetration depth increased with the defect size in the steel-concrete interface, demonstrating the effectiveness of the proposed method in identifying chloride permeability.
STRUCTURAL CONCRETE
(2021)
Article
Construction & Building Technology
Wenjun Zhu, Kai Zhang, Zijia Wang, Yu Zhou, Yude Xu, Xiaopei Cai
Summary: This study investigates the influence of corrosion on the postyielding behavior of steel reinforcement. The results show that different corrosion morphologies and degrees significantly affect the configuration of stress-strain curves. When the corrosion degree exceeds 15%, the yield plateau disappears due to pitting corrosion.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Wulong Zhang, Raoul Francois, Ruiyan Wang, Yuxin Cai, Linwen Yu
Summary: This study discusses the corrosion behavior of stirrups in concrete beams exposed to a chloride environment under sustained loading for 9 years. The experimental results show that the horizontal legs of stirrups primarily corroded at certain locations, while the corrosion of vertical legs was slight and the correlation between the corrosion of stirrups and main reinforcing steels was difficult to establish.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Gang Luo, Kai Zhang, Wenjun Zhu, Tielin Chen, Xinwen Yang, Shichao Yang, Yude Xu
Summary: The study found that non-uniform corrosion of mild steel reinforcement can result in two types of cracking paths in the concrete cover, including corrosion-induced cracks along the radius and branches in the secant direction within the corrosion zone. Additionally, the aggregate of the concrete significantly influences the propagation of the cracking path.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Bo Min, Chengping Zhang, Wenjun Zhu, Xu Zhang, Pengfei Li
Summary: Through model tests and numerical simulations, this study found that longitudinal cracks at the tunnel invert aggravate the damage of the tunnel lining, leading to brittle instability. The cracks increase deformation significantly, reduce bending moment, and increase contact pressure, decreasing the tunnel's bearing capacity.
THIN-WALLED STRUCTURES
(2021)
Review
Construction & Building Technology
Hong S. Wong, Ueli M. Angst, Mette R. Geiker, O. Burkan Isgor, Bernhard Elsener, Alexander Michel, Maria Cruz Alonso, Maria Joao Correia, Jose Pacheco, Joost Gulikers, Yuxi Zhao, Maria Criado, Michael Raupach, Henrik Sorensen, Raoul Francois, Shishir Mundra, Mezgeen Rasol, Rob Polder
Summary: This paper critically reviews the properties of the steel-concrete interface (SCI) and its influence on corrosion initiation of embedded reinforcing steel. The available methods for characterising the local properties of the SCI are evaluated and their advantages, applications, and limitations are summarized. The findings indicate a lack of well-established, non-destructive techniques for direct monitoring of the SCI, particularly in regards to moisture-related aspects. Promising novel techniques for further development and application are identified. Several recommendations for future research needs are provided.
MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Civil
Wenjun Zhu, Chengyue Yang, Zhongxu Yu, Junhua Xiao, Yude Xu
Summary: This paper presents the corrosion-induced cracking performance of reinforced concrete in a chloride condition. The meso-scale structures of concrete specimens were studied using X-ray micro-computed tomography, revealing the corrosion propagation, accumulation and transportation of corrosion products, and the defects and cracking behaviors of concrete cover. The experimental results show that defects can provide space for corrosion products, significantly increasing the corrosion process and delaying cracking. The propagation of cracking path from the corrosion area to the concrete cover was also captured, contributing to the understanding of corrosion-induced cracking behavior.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Proceedings Paper
Construction & Building Technology
D. Coronelli, P. Bamonte
PROCEEDINGS OF ITALIAN CONCRETE DAYS 2018
(2020)
Article
Materials Science, Multidisciplinary
C. F. Barros, B. Muzeau, V. L'Hostis, R. Francois
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)