Article
Materials Science, Multidisciplinary
Yujie Zhang, Junping Zhang, Bingcong Chen, Yumin Zhang
Summary: Steel and steel-fiber-reinforced concrete (SFRC) composite beams with high-strength friction-grip bolt (HSFGB) connectors have been found to improve the shear behavior of HSFGBs and enhance the potential application of composite beams. Finite element models (FEMs) were developed to evaluate force transmission and failure mechanisms of HSFGBs, and significant influencing factors affecting HSFGB shear performance were explored.
FRONTIERS IN MATERIALS
(2022)
Article
Engineering, Civil
Qizhi Xu, Wendel Sebastian, Kaiwei Lu, Yiming Yao, Jingquan Wang
Summary: This paper presents an experimental study on the shear performance of composite connections, revealing the influence of key connection variables such as bolt diameter, slab thickness, bolt strength, pretension force, and bolt clearance. The results show that these variables have significant effects on the shear resistance of the connection.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Othman Hameed Zinkaah, Zainab Alridha, Musab Alhawat
Summary: This study evaluates the flexural performance of polymer bars reinforced geopolymer concrete (FRP-GPC) beams through numerical and theoretical investigations. The numerical study develops nonlinear finite element models validated with experimental data, while the theoretical study assesses the accuracy of design codes in predicting the loading capacity of FRP-GPC beams. The results show the significant role of compressive strength on load capacity and indicate the need for improvement in existing design standards for FRP-GPC beams.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Rita Irmawaty, Fakhruddin, Januarti Jaya Ekaputri
Summary: This study investigated the performance of geopolymer-mortar panels (GMPs) in improving the shear capacity of reinforced-concrete (RC) beams. The results showed that GMP is an effective technique for enhancing the shear capacity and changing the failure mode of RC beams, making it a promising method for shear-strengthening in building applications.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Wei Wang, Xiedong Zhang, Yu Ren, Fanglong Bai, Chaohui Li, Zhiguo Li
Summary: This paper studied the shear properties of bolt connections embedded in Steel Lightweight Aggregate-Concrete Composite Beams (SLACCBs) through numerical modeling. The effects of various parameters on the shear behavior were investigated, and design formulae for predicting the shear strength of bolt connections were proposed.
Article
Mechanics
Xiaochun Fan, Zhengrong Zhou, Wenlin Tu, Mingzhong Zhang
Summary: The study revealed that all BFRP-IPC beams failed in shear due to BFRP stirrup rupture and shear-compression failure. Compared to stirrup spacing, the shear span-to-depth ratio had a more pronounced influence on the shear performance of BFRP reinforced IPC beams, leading to a maximum reduction of ultimate shear load by 29.4%.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Mahmood Y. Alkhateeb, Farzad Hejazi
Summary: This study proposes a new retrofitting scheme for RC beams using the MAS system to restrain CFRP rods. The proposed technique increases the load capacity and prevents premature debonding of the CFRP rods.
Article
Construction & Building Technology
Haotian Tao, Huifeng Yang, Jin Zhang, Gaoyan Ju, Jiawei Xu, Benkai Shi
Summary: This study evaluated the computational effectiveness of various dimensional finite element models for timber-concrete composite (TCC) beams. The results showed that the 1D and 2D models had higher computational efficiency than the 3D model. The 3D model, however, presented the failure modes of TCC beams more accurately. Overall, the FE models were validated to be feasible for further studies on TCC structures.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
William D. Galik, Paolo M. Calvi
Summary: This paper provides the necessary evidence for the identification of a rational design procedure of NPS & REG; Basic beams subjected to shear loads. It summarizes the state of the knowledge of the shear response of steel-concrete composite truss beams, performs a preliminary assessment of existing shear design approaches, expands the existing shear behavior database, and supports recommendations of a rational shear design approach.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Guanyuan Zhao, Ying Wang, Li Zhu, Jiacheng Zhao
Summary: The shear performance of prestressed concrete T-beam strengthened by steel plate-concrete composite was investigated through experimental and numerical analysis. Two specimens were tested before and after strengthening, and the results showed improvement in shear performance and ductility of the strengthened specimen. Nonlinear finite element models were developed and analyzed to study the effects of connection strength and material strength. The proposed strengthening technique effectively improved the shear performance of the specimen, with the connection strength playing a crucial role.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Shuai Fang, Hai Yan Zhang, Jiangxia Quan
Summary: This study investigated the anchorage behavior of geopolymer-grouted rock bolts and identified the factors influencing their anchorage performance. The experimental results showed that geopolymer grout provides better bonding than ordinary cement grout. Deformed bolts grouted with geopolymer exhibited better anchorage performance compared to plain round bolts, while bolt spacing of more than 150mm had little effect on anchorage performance. Increasing anchorage depth improved both the loading capacity and ductility but reduced the nominal bond strength of deformed bolts. The critical anchorage depth for achieving tensile failure of bolts was found to be 12d for both geopolymer-grouted and cement-grouted bolts.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Faham Tahmasebinia, Adam Yang, Patrick Feghali, Krzysztof Skrzypkowski
Summary: Rock bursts are caused by high stresses and faults in the deep geological profile and require various rock and face supports in deep mining excavations. This study focused on the shearing impact of static loads on cable bolts, an important structural support mechanism. The results showed a positive correlation between bolt diameter, yield strength, and maximum force and displacement.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Yang Liu, Linlin Fan, Wentao Wang, Yaobin Gao, Jintao He
Summary: Damage of high-strength bolt (DHSB) is inevitable and irreversible during long-term use, posing potential danger demonstrated by changes in mechanical properties. This study uses ABAQUS software to simulate the stress of various types of DHSB under earthquake and compares with undamaged high-strength bolts (UDHSB). Findings indicate that the most critical crack position is at the bottom of the second ring thread. Shorter crack length leads to greater stress concentration and displacement deformation. Increasing crack numbers intensify stress concentration. Tooth deformation generates concentrated stress at the top of the thread tooth, while cracks generate it at the bottom. Changing tooth shape in the appropriate position reduces bolt damage. Timely replacement of damaged bolts is crucial due to the doubled harm caused by bolt damage.
Article
Engineering, Civil
Alaa A. El-Sisi, Ahmed Hassanin, Hesham F. Shabaan, Ahmed Elsheikh
Summary: This study presented an experimental and numerical investigation on strengthened composite steel-concrete beams using externally post-tensioned tendons with partial shear connection. Increasing the degree of shear connection was found to enhance the performance and load-carrying capacity of the beams.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Wei Zhou, Zijun Xu, Chi Ma
Summary: This article introduces a new type of precast beam assembled with bolt-steel plate joints, which has good flexural capacity. Through static behavior tests and finite-element analysis, the influence of steel-plate thickness and span-depth ratio on the performance of the beams is investigated, and a simplified flexural-capacity calculation formula is proposed.
Article
Construction & Building Technology
Tuan Le, Mark A. Bradford, Xinpei Liu, Hamid R. Valipour
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2020)
Article
Engineering, Civil
Jia-Bin Ye, Jian Cai, Qing-Jun Chen, Xinpei Liu, Xu-Lin Tang, Zhi-Liang Zuo
Article
Engineering, Civil
Lan Kang, Shutao Hong, Xinpei Liu
Summary: This study introduces rational design equations for cellular beams with circular or elongated openings based on the Direct Strength Method, verified through a finite element model, to accurately predict shear strength of these beams, including those with multiple openings.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Lan Kang, Bin Wu, Xinpei Liu, Hanbin Ge
Summary: This paper reports a series of experimental tests on the post-fire mechanical and fracture properties of high strength steel Q460. The results show that the yield strength and ultimate strength of Q460 decrease with an increase in heating temperature, but the elongation increases. Ductile fracture behavior of the specimens can be observed during the tensile tests.
ADVANCES IN STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Jia-Bin Ye, Jian Cai, Xinpei Liu, Qing-Jun Chen, Zhi-Liang Zuo, Bing-Quan He
Summary: This paper investigates the structural performance of inclined reinforced concrete pile groups subjected to horizontal static and impact loads, finding that the variation of inclination angle significantly affects the static and dynamic behaviour of pile groups. Different failure modes of pile groups under impact are observed for different inclination angles.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Yifan Zhou, Brian Uy, Jia Wang, Dongxu Li, Zhichao Huang, Xinpei Liu
Summary: Stainless steel-concrete composite beams are a new application for infrastructure and highways, offering sustainable solutions with their superior properties. This study conducted comprehensive experimental, numerical and analytical research on the behavior of composite beams, proposing new analytical models and a modified design approach.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Chang-Min Yuan, Jian Cai, Qing-Jun Chen, Xinpei Liu, Houjun Huang, Zhiliang Zuo, An He
Summary: This paper introduces and investigates an innovative type of precast recycled fine aggregate (RFA) concrete beam-column joint with pressed sleeve connections through experimental study, proving its desirable performance and feasibility. The proposed connection shows similar performance to the conventional monolithic cast-in-situ counterpart in terms of flexural capacity and shear capacity. Analytical methods for predicting the flexural and shear capacities of the joint are recommended.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Xinpei Liu, Mark Bradford, Jia Wang
Summary: This paper investigates the axial load-slip behavior of single-leg bolted angle steel connections at elevated temperatures for steel lattice structures. A three-dimensional finite element model is developed to take into account temperature-dependent material nonlinearities and the interaction of structural components. The model's predictions are validated by comparing them with experimental results. Parametric studies are conducted to analyze the effects of various factors on the load-slip responses of the connections. A simplified theoretical model is proposed and verified for predicting the behavior of the connections, which could be applicable to advanced analysis of steel lattice structures.
Article
Construction & Building Technology
Lan Kang, Feng Chen, Bin Wu, Xinpei Liu, Hanbin Ge
Summary: This paper presents the results of an experimental study on the material behavior of laser cladding sheets (LC sheets) produced using commercial 316 L stainless steel powder. The study investigates the mechanical properties, degree of anisotropy, and microstructure of the LC sheets. Tensile tests were conducted to examine the influence of scanning pattern, specimen orientation, and thickness on the mechanical properties. The results show elastic isotropy for the elastic modulus and Poisson's ratio, and plastic anisotropy for the proof stresses, ultimate stress, and elongation, with a degree of anisotropy for most of the plastic mechanical properties below 20%. Microindentation hardness measurements establish a linear correlation between ultimate strength and hardness. Microstructure analyses using metallographic and SEM tests provide insights into the observed mechanical properties.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Engineering, Civil
Lan Kang, Bin Zhang, Mark A. Bradford, Xinpei Liu
Summary: In this study, the interfacial behavior between the substrate and LC sheet of laser cladding sheet (LCS)-covered steel plates is investigated. It is observed that the stresses in the LCS-covered plates can be transferred effectively through the interface between the substrate and LC sheet, and perfect interfacial bonding is assumed. A theoretical model is developed to describe the elastic stress/strain distributions of LCS-covered steel plates subject to tension, and it is validated by experiments.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Chang-Min Yuan, Jian Cai, Qing-Jun Chen, Xinpei Liu, Zhiliang Zuo, An He, Houjun Huang
Summary: The seismic behavior of precast recycled fine aggregate (RFA) concrete columns with pressed sleeve connections was experimentally investigated to explore their potential in new concrete construction. Various parameters were considered, including the axial compression ratio, longitudinal reinforcement ratio, replacement ratio of RFA, and manufacturing method. The experimental results showed the favorable performance of the pressed sleeve connections and the feasibility of using RFA concrete in precast columns.
Article
Engineering, Civil
Lan Kang, Cheng Zhang, Mark A. Bradford, Xinpei Liu
Summary: This study employs laser cladding technology as a novel repair method for damaged steel structures. The results show that the stiffness and strength of the repaired compression members are restored and the LC repair technique can significantly reduce stress/strain concentration caused by local corrosion.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Lan Kang, Feng Chen, Mark A. Bradford, Xinpei Liu
Summary: Laser additive manufacturing (LAM) is an advanced technology with high efficiency and precision in producing large size 3D printing elements. This study investigates the mechanical properties and microstructure of LAM 316L stainless steels. The results show high anisotropy in the mechanical properties of LAM 316L stainless steels in the building elevation plane.
Article
Engineering, Civil
Mark A. Bradford, Xinpei Liu, Chang Chen, Jia Wang
Summary: In this paper, a finite element model is constructed to investigate the behavior and response of lattice angle steel structures under fire loading. The model considers material and geometric non-linearities, load eccentricities, bolted joint slippage, and explicit dynamic analysis for quasi-static loading. The accuracy of the model is validated by comparing its predictions with experimental results. The model is extended for structural fire analysis by incorporating temperature-dependent material properties and calibrated load-slip relationship for bolted connections.
Article
Construction & Building Technology
Yifan Zhou, Brian Uy, Jia Wang, Dongxu Li, Xinpei Liu
Summary: Stainless steel-concrete composite beam is a popular structural form for offshore bridges and high-rise buildings due to the corrosion resistance and ductility of stainless steel. However, the limited research and design recommendations have hindered the widespread application of stainless steel shear connectors in composite beams.
STEEL AND COMPOSITE STRUCTURES
(2023)
