Article
Mechanics
Pu Zhang, Yanli Su, Ye Liu, Danying Gao, Shamim Ahmed Sheikh
Summary: The study found that the CFRP grid-reinforced ECC formwork significantly improved the cracking load and maximum load of concrete beams, while the strength of ECC had no obvious impact on the cracking performance and load-carrying capacity. The cracking performance and load-carrying capacity of the beams increased with the incorporation of ECC and CFRP grids, an increasing GFRP bar reinforcement ratio, and an increase in CFRP grid area and reduction in spacing.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
M. Talha Junaid, Abdul Saboor Karzad, Abdalla Elbana, Salah Altoubat
Summary: This paper presents an experimental investigation into the shear behavior of Glass Fiber Reinforced Polymer (GFRP) reinforced concrete beams. It also examines the effectiveness of shear strengthening using externally-bonded Carbon Fiber Reinforced Polymer (EB-CFRP) sheets and investigates the possibility of interaction between internal and externally bonded shear reinforcement. The results show that GFRP is a viable reinforcement for different types of concrete, and EB-CFRP proves to be a feasible strengthening technique. The difference in shear strength gain between different arrangements of EB-CFRP may indicate interaction between internal and external shear reinforcement.
Article
Mechanics
Dongdong Chen, Xiaoyu Sun, Shoune Xiao, Guangwu Yang, Bing Yang, Tao Zhu, Mingmeng Wang
Summary: This study investigated the energy-absorbing mechanisms of composite structures subjected to quasistatic and dynamic axial crushing loads. Double hat-shaped composite tubes made of CFRP and GFRP were tested and analyzed. Results showed that the CFRP structures had reduced energy absorption at higher loading rates, while the GFRP structures remained relatively constant. A finite element model considering strain rate effects accurately predicted the crushing behavior. Mechanical properties of the composite materials played a critical role in the distinct responses of CFRP and GFRP structures. The findings contribute to the crashworthiness design of composite energy-absorbing structures.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Amr E. M. Abdallah, Ehab El-Salakawy
Summary: This paper investigates the requirements of GFRP confinement reinforcement in circular RC columns of moment-resisting frames. Through testing and research, reasonable configuration requirements were discovered to achieve satisfactory levels of stability and deformability.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Construction & Building Technology
Yishuo Huang, Ming -Gin Lee, Yu-Cheng Kan, Wei -Chien Wang, Yung-Chih Wang, Wei -Bang Pan
Summary: This study explores the retrofitting of reinforced concrete beams with ultra-high-performance concrete (UHPC) or carbon fiber-reinforced polymer (CFRP). The results show that UHPC increases the ultimate load of the beams by 35% and their displacement by 26.8 mm, making it a better choice in terms of toughness and economic benefits.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Mechanics
Hamed Jafarzadeh, Mahdi Nematzadeh
Summary: This study examined the flexural response of heated beams and found that the use of CFRP sheets improved their flexural capacity. The increase in exposure temperature had a more notable effect on the strengthening performance.
COMPOSITE STRUCTURES
(2022)
Article
Polymer Science
Hazem Ahmad, Amr Elnemr, Nazam Ali, Qudeer Hussain, Krisada Chaiyasarn, Panuwat Joyklad
Summary: This paper investigates the moment redistribution behavior occurring due to flexural and shear loading in Glass Fiber-Reinforced Polymer- (GFRP) reinforced continuous concrete beams. The finite element model showed good agreement with experimental results, with significant moment redistribution observed from hogging to sagging moment region in beam specimens.
Article
Materials Science, Multidisciplinary
Chang Wu, Yanli Su, Pu Zhang, Hong Zhu, Danying Gao, Shamim Ahmed Sheikh
Summary: This paper investigates the use of ECC as an alternative to concrete in tension zones, combined with FRP bars to develop a new type of composite beam with excellent durability. Experimental results show that ECC improves the flexural performance of FRP-reinforced concrete beams and the proposed formwork has a positive effect on crack resistance and load capacity.
FRONTIERS IN MATERIALS
(2022)
Article
Engineering, Civil
Yasser M. Selmy, Ehab F. El-Salakawy
Summary: This study investigates the seismic performance of glass fibre-reinforced polymer (GFRP)-reinforced concrete (RC) rectangular columns using numerical analysis. The results show that increasing the concrete strength and decreasing the spacing of transverse reinforcement can improve the capacity of GFRP-RC columns, while increasing the axial load level reduces the lateral load capacity.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Piya Chotickai, Pichai Tongya, Satja Jantharaksa
Summary: This study found that the CFRP jacket had reduced confinement effect in RC columns with corrosion damage before CFRP installation. The effectiveness of the strengthening system strongly depended on the volumetric CFRP ratio, with a high ratio restoring confinement effect in severely corroded columns and significantly improving ultimate load and ductility. The accuracy of analytical and mechanical property models for calculating capacity of CFRP-confined columns with corrosion damage was evaluated.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Xiaolu Wang, Lingzhu Zhou, Yuke Liang, Yu Zheng, Lixiao Li, Bo Di
Summary: This study investigated the shear resistance and damage evolution of glass fiber-reinforced polymer (GFRP)-reinforced concrete short columns. The effects of stirrup reinforcement ratio, longitudinal reinforcement ratio, and stirrup type on the behavior of the columns were examined. The study found that increasing the stirrup reinforcement ratio significantly improved the shear capacity and lateral ultimate displacement of the columns. The accuracy of shear design equations in predicting shear capacity was also evaluated, and a viable method for evaluating the damage level of the columns was proposed using digital image correlation and smart aggregate technology.
Article
Mechanics
Lili Hu, Peng Feng
Summary: The use of PS CFRP technology effectively enhances the buckling resistance of steel columns. Axial and eccentric compression tests were conducted under different conditions, analyzing the buckling capacity and failure modes, and further establishing a model of the buckling mechanism.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Zehui Xiang, Jingsong Wang, Jiangang Niu, Jie Zhou, Jun Wang
Summary: This paper evaluates the axial compression performance of corroded concrete short columns reinforced by concrete canvas (CC) and carbon fiber reinforced polymer (CFRP). Through tests and analysis, it is found that the presence of CC changes the failure morphology of the specimen and improves the uneven deformation of concrete. The jointly reinforced method exhibits high plasticity deformation ability. The increase in corrosion rate has different effects on the peak stress and ultimate strain of the specimens.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Mahdi Nematzadeh, Farid Hasan-Nattaj, Aliakbar Gholampour, Hassan Sabetifar, Tuan D. Ngo
Summary: The study found that concrete wrapped with CFRP exhibits higher compressive strength, peak axial strain, maximum volumetric strain, toughness, and energy absorption than unwrapped concrete. The proposed stress-strain model accurately predicts the behavior of heated concrete with CFRP wrapping, demonstrating the benefits of using FRP in enhancing the performance of structural members exposed to elevated temperatures.
Article
Polymer Science
Anbang Li, Hao Wang, Han Li, Deliang Kong, Shanhua Xu
Summary: The purpose of this study is to investigate the stress concentration of a corroded steel plate strengthened with carbon fiber reinforced polymer (CFRP) plates. Surface profile measurements were conducted to obtain 3D coordinate data of the corroded steel surface, and finite element models were established to investigate the stress concentration. The results showed that the stress distribution is related to the shape, size, and position of rust pits, while the stress concentration factor is influenced by the weight loss rate, stiffness, and prestress level of the CFRP plates.
