Article
Construction & Building Technology
Tao Zhang, Yong-zhi Gong, Fa-xing Ding, Xue-mei Liu, Zhi-wu Yu
Summary: This study investigates the flexural behavior of concrete-filled elliptical steel tubes (CFET) through experimental and numerical methods, revealing a ductile behavior in all specimens and discussing the composite action between the steel tube and core concrete. By establishing a finite element model with precise material constitutive models, the flexural mechanics of CFETs were comprehensively studied, including analysis of moment vs. curvature curves, stress and strain distribution, and composite action. Bond slip at the interface between the core concrete and steel tube was observed during loading, and design formulas were proposed to predict the ultimate moment and flexural stiffness of CFETs with satisfactory agreement between predicted and experimental/FE results.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Physical
Xiaojun Zhou, Yulin Zhan, Tingmin Mou, Zhilun Li
Summary: Based on the Guansheng Qujiang Bridge project, the flexural mechanical properties of ultrahigh strength concrete filled steel tubes (UHSCFST) were investigated. Test results showed that the strength of the core concrete had a slight impact on the bending capacity and ductility of UHSCFST specimens. The failure modes of UHSCFST specimens were attributed to excessive deflection and local buckling in the compression zone.
Article
Construction & Building Technology
Gen Li, Chao Hou, Luming Shen, Chuan-Chuan Hou
Summary: This paper presents a comprehensive investigation on the lateral impact behavior of concrete-filled steel tubes suffering from localized pitting corrosion damage. A refined finite element analysis model is developed for the simulation of locally corroded CFSTs subjected to lateral impact loads. It is found that localized pitting corrosion induces severe deterioration on the lateral impact behavior of CFSTs.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Xiaozhong Li, Sumei Zhang, Wei Lu, Jian Li
Summary: This paper investigates the influence of critical parameters on the axial compressive behavior of T-CFST stub columns through experimental study. The results show that T-CFST can prevent shear failure and significantly improve compressive strength.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Fanghong Wu, Yanqin Zeng, Ben Li, Xuetao Lyu
Summary: The experimental study in this paper demonstrates that CA-UHPCFSTs exhibit good ductility under bending, and increasing steel tube thickness can enhance the ultimate flexural capacity. It was also found that there is a significant confinement effect between the compressive zone and centroidal plane, while the confinement effect in the tensile zone is minimal.
Article
Engineering, Civil
Jiong-Yi Zhu, Junbo Chen, Tak-Ming Chan
Summary: This paper reviews the lateral behavior of circular concrete filled steel tube (CFST) and existing lateral-axial strain models, and proposes a modified strain model for high strength concrete CFST to capture the interaction behavior of the steel tube and concrete accurately. This analytical model can predict the load bearing capacity, load-shortening curve, and axial strain-lateral strain relationship of CFST with both normal and high strength concrete effectively.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Zohreh Rahmani, Morteza Naghipour, Mahdi Nematzadeh
Summary: The study introduced a novel concept of prestressed concrete-encased CFST beams to improve concrete compressive strength and control crack in the tension zone. Experimental results showed that prestressed strands enhanced the confinement effect on core concrete and structural performance, while steel tubes increased bearing capacity and energy absorption in beams.
STRUCTURAL CONCRETE
(2021)
Article
Construction & Building Technology
Junchang Ci, Mizan Ahmed, Daxing Zhou, Liqun Hou, Shicai Chen
Summary: This paper presents experimental and numerical investigations on circular concrete-filled double steel tubular (CFDST) members under flexural load. The study analyzes the failure modes, moment-curvature curves, deflection curves, and strain distributions of the specimens. A nonlinear finite element model is developed and parametric studies are performed. A simple formula for calculating the flexural capacity of CFDST members is proposed and compared with design codes.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Junchang Ci, Mizan Ahmed, Daxing Zhou, Liqun Hou, Shicai Chen
Summary: This paper presents experimental and numerical investigations on the flexural performance of circular concrete-filled double steel tubular (CFDST) members. The study concludes that CFDST members exhibit ductile behavior under flexural load based on analyses of failure modes, moment-curvature curves, deflection curves, and section longitudinal strain distributions. A validated finite element model (FEM) is used for parametric studies, and a simple formula for calculating the flexural capacity of CFDST members is proposed. The study also reveals that existing design codes underestimate the moment capacities of CFDST members.
STRUCTURAL CONCRETE
(2023)
Article
Engineering, Civil
Peng Dai, Lu Yang, Jie Wang, Junwei Fan, Manfang Lin
Summary: This study experimentally investigated the bond stress-slip relationship in CFSST structures and developed theoretical and empirical models to predict and analyze the behavior. These models can serve as input data for analytical and numerical simulations in future studies of CFSST structures.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Yan Diao, Yi Qin, Jiahao Guo
Summary: This paper investigates the performance of T-joint concrete filled-steel tube (CFST) members under axial compressive load and chord bends. Experimental and numerical studies were conducted to analyze the influence of various parameters on the performance of T-joint CFST. A criterion for determining the ultimate bearing capacity of T-joint CFST with PBL is presented. The proposed calculation method for ultimate moment capacity considers the reinforcement of the brace, the confinement effect of the steel tube on concrete, and the plastic stress distribution of the steel tube, showing better agreement with tests and FE analysis compared to the method in DBJ.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Marine
Yongqian Zheng, Cunhua Wang, Manying Chen
Summary: This paper develops FBE models and design formulas for circular double-skin and double-tube CFST members, achieving good prediction results consistent with experimental results.
Article
Chemistry, Physical
Hyun-Do Yun, Wan-Shin Park, Young-Il Jang, Sun-Woo Kim
Summary: This study investigates the influence of fly ash and recycled sand on the flexural behavior of SFRCC-filled steel tubes. The addition of micro steel fiber reduces the elastic modulus, while the replacement of fly ash and recycled sand decreases the elastic modulus and increases the Poisson's ratio. The incorporation of micro steel fibers enhances the strength and results in a smooth descending curve after initial cracking. The flexural tests on the FRCC-filled steel tubes show similar peak loads and high applicability of the equation proposed by AISC. The deformation capacity of the SFRCC-filled steel tubes is slightly improved, but the denting depth increases due to the low elastic modulus.
Article
Construction & Building Technology
Song Li, Chu-Jie Jiao
Summary: RPCFSTs have become a significant research target in recent years, as they offer superior vertical components for building applications. The use of CFRP wrapping has been proven effective in enhancing the bearing capacity and delaying local buckling of steel tubes in CF-RPCFSTs. Experimental results show that three-layer CFRP-confined RPC-filled thin-wall steel tubes are suitable for engineering applications.
ADVANCES IN STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Khanh Ba Le, Vui Van Cao, Hung Xuan Cao
Summary: This study experimentally investigated the torsional behavior of various specimens, finding that concrete infill enhances the torsional moment capacity of concrete filled steel tube specimens. The presence of diagonal cracks on the concrete infill after cutting the steel tubes provides evidence of collaboration between the steel tube and concrete.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Z. Li, T. Li, Y. Xiao
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2020)
Article
Construction & Building Technology
J. H. Wang, S. Kunnath, J. He, Y. Xiao
JOURNAL OF STRUCTURAL ENGINEERING
(2020)
Article
Construction & Building Technology
S. C. Zhou, C. Demartino, Y. Xiao
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
B. Shan, C. Q. Chen, J. Y. Deng, T. Y. Li, Y. Xiao
Summary: The study focuses on the application of nondestructive ultrasonic testing for detecting the quality of glued laminated bamboo components, conducting rheological performance tests and ultrasonic transmission tests on modified adhesives and glubam specimens. A method for determining the optimal spray amount based on rotational viscosity and sagging test was provided. The study proposed a defect criterion using the ultrasonic transmission method to identify glue-line defects in glubam specimens accurately.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
J. S. Huo, J. F. Ma, Y. Xiao
Summary: The study conducted experiments on the combustion behaviors of glue-laminated bamboo boards and found that glubam generally performs better than plywood. Comparison with other studies suggests that glubam is less flammable than laminated bamboo materials and several wood species, indicating its potential as a substitute for untreated plywood in structural and lining applications.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Z. Li, X. Z. He, Z. M. Cai, R. Wang, Y. Xiao
Summary: Glued laminated bamboo (glubam) is an engineered bamboo made by laminating thin bamboo boards, with performance determined by board quality. A comprehensive testing program was conducted on typical bamboo boards, proposing a simple axial stress-strain model and comparing strength values.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Y. Xiao, H. Cai, S. Y. Dong
Summary: This study found that cross-laminated bamboo and timber beams exhibit elastobrittle behavior and adequate load-carrying capacity. The calculated bending stiffness and capacity fall between values calculated by two prediction models.
JOURNAL OF STRUCTURAL ENGINEERING
(2021)
Article
Engineering, Civil
Z. W. He, C. Q. Chen, B. Shan, Y. Xiao
Summary: Glubam is a newly developed structural material with properties comparable to other wood-based materials. The use of FRP bar as reinforcement in structures is attractive due to its lightweight, high strength, and corrosion resistance. Pull-out tests of carbon FRP bars glued-in glubam revealed an increasing tendency of peak loads with various parameters. The study also proposed a design equation for estimating the pull-out strength of CFRP bars in glued-in glubam joints.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Construction & Building Technology
Dade Lai, Cristoforo Demartino, Yan Xiao
Summary: FRRC is a concrete-based material that combines the advantages of fiber-reinforced concrete (FRC) and rubberized concrete (RuC), with excellent high-strain rate compressive behavior, making it a promising option for protecting structures against impact and blast loads.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Mechanics
Da Shi, Cristoforo Demartino, Zhi Li, Yan Xiao
Summary: The aim of this study is to provide a rational understanding of the tensile axial behavior of bolted steel to laminated composite bio-based material connections. The study investigates and compares the behavior of connections with slotted-in steel plates using laminated timber and bamboo. A new phenomenological prediction model is proposed based on the experimental findings to accurately describe the observed behavior and differentiate between brittle and ductile failures.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
B. Shan, J. Y. Deng, J. M. Wu, Q. Peng, T. Y. Li, Y. Xiao
Summary: This study tested and analyzed the strength performance of MPC glubam joints, and found that the existing design code overestimates the anchorage strength in non-orthogonal loading directions. It was also found that aligning the major axis of the metal plate parallel to the plate longitudinal direction provides higher design shear strength compared to aligning it perpendicular to the plate longitudinal direction, especially under combined shear and tension loading. The design strength of MPC glubam joints is significantly higher than the Class I MPC timber joints according to the Chinese Standard, suggesting its potential as an alternative structural system.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
R. Wang, H. Y. Pan, Z. Li, Y. Xiao
Summary: Glued laminated bamboo moment-resisting connections, including bamboo-steel-bamboo (BSB) and steel-bamboo-steel (SBS) connections, were studied in this research. The off-axis embedment behaviors of bamboo panels significantly influenced the mechanical properties of glubam connections. The use of multidirectional laminated bamboo panels avoided brittle splitting/shear failure modes and improved the ultimate bearing strength, energy dissipated ability, and ductility ratios. It is suggested to use multidirectional panels for structural components with complex stress fields and a simplified calculation method based on the European yield model (EYM) was proposed for design purposes.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Engineering, Civil
Dade Lai, Cristoforo Demartino, Yan Xiao
Summary: A machine-learning model combining several algorithms is developed to predict the maximum displacements of RC beams under impact loads. The model is trained using a comprehensive database of 342 samples and achieves approximately 90% validation accuracy.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Z. Li, D. Xiao, R. Wang, Y. Xiao
Summary: The off-axis embedment behavior of unidirectional and multidirectional laminated engineered bamboo panels used for glued-laminated bamboo structures was studied in this research. Different failure patterns, stress-displacement curves, and surface strain were reported. Loading angles significantly influenced the embedment performance of unidirectional panels, while quasi-isotropic properties were noticed for multidirectional panels. The capacity functions were provided to predict the mean off-axis embedment strength and characteristic strength values.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Ruijia Wu, Jiaxi Mao, Jinyuan Li, Yiyang Qian, Han Feng, Y. Xiao
Summary: Glubam is a type of engineered bamboo that was studied for its torsional shear properties. Testing was done on prismatic specimens with square sections using both conventional strain gauge-based instrumentation and a digital image correlation (DIC) system. The study examined thick- and thin-strip glubams, the influence of carbonization on thick-strip glubam, and compared them to spruce-pine-fir (SPF). The results showed that carbonization slightly increased the strength of thick-strip glubam but made it more brittle, while the presence of bi-directional bamboo fibers in thin-strip glubam contributed to its larger deformability compared to thick-strip glubam.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Jingzhe Li, Qihan Shen, Jingfeng Wang, Fengqin Wang, Guoqiang Li
Summary: This study investigates the effectiveness of externally bonding carbon-FRP for strengthening concrete-filled steel tube short columns with void defects. It proposes strength prediction formulas and provides insights into the strengthening mechanisms.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Tianyao Liu, Xudong Qian, Wei Wang, Yiyi Chen
Summary: This article translates the ductile tearing process of welded joints made from circular hollow sections into the load resistance and strain levels, providing an interface between fracture-mechanics based assessments and engineering analysis and monitoring.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Review
Construction & Building Technology
Zhen Zhu, Yuliang Chen, Huiqin Wu, Peihuan Ye
Summary: This study investigated the shear capacity of solid-web H-shaped steel reinforced concrete (HSRC) columns under combined torque. Seven HSRC columns were tested, and the influence of different parameters on the shear capacity was analyzed. The results showed that the addition of H-shaped steel improved the shear capacity, while increasing the axial compression ratio increased the shear capacity. However, increasing the torsion bend ratio and shear span ratio decreased the shear capacity.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Naizhou Zhang, Huatian Zhao, Lianjin Bao, Feng Zhou, Xiaoming Chen, Sheng Jiang, Gang Shi
Summary: This study focuses on the mechanical properties of butt welds in thick GJ steel plates and analyzes the differences between the weld specimens and the base metals in terms of static and cyclic mechanical properties.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Xianzhong Zhao, Zhenyu Xu, Shen Yan
Summary: This study aims to reveal the mechanisms that determine the survival of suspended domes when subjected to sudden cable rupture. The results show that the remaining structure can arrest the initial local damage and establish an alternative path for hoop cables, thereby regaining balance. The relaxation of hoop cables can transmit outwards and inwards, causing severe damage and potential structural collapse. The failure of diagonal cables has minimal impact on the structure.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Kathleen Lauwens, Barbara Rossi
Summary: This paper presents an experimental program that tests the behavior of fabricated stainless steel beams under combined bending and torsion. The test results are compared to elastic theory and highlight the overly conservative nature of current design rules.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Sima Abolghasemi, Nicholas E. Wierschem, Mark D. Denavit
Summary: Structures susceptible to soft story mechanisms are particularly vulnerable to earthquakes. The strongback has been proposed as a way to prevent soft story mechanisms, but its impact on structural performance considering vertical stiffness irregularities and different arrangements of energy dissipation devices is unclear. This study investigates the effects of strongback on a small-scale four-story elastic structure with varying stiffness irregularities and damper arrangements. The results show that the strongback significantly reduces maximum story drift and makes the structural performance insensitive to damper position and distribution.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Tran-Van Han, Jeong MoonSook, YongNam Kim, Dongkyu Lee, Nguyen-Vu Luat, Kihak Lee
Summary: This paper presents a new approach for steel modular structures, incorporating the S-CN connector and rectangular hollow section (RHS) steel members. The mechanical behavior of S-CN connectors and their application in beam-column connections under compressive loading are studied numerically and validated experimentally.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Yong-li Tao, Xue-chun Liu, Xuesen Chen, Wen -bin Cui, Long-xin Guo
Summary: In this study, different weld details were proposed to improve the seismic performance of steel column splicing flange joints. Four full-scale specimens were tested under cyclic loads to analyze the hysteresis behaviors, yield moment, ductility, bolt forces, energy dissipation, stress and strains. Parametric analysis was conducted to discuss the influences of weld details, weld geometries, and flange openings. The results showed that different weld details had advantages in terms of ductility or energy dissipation capacity, bolt tension distribution, stress or strain distributions. Formulas for yield moments were proposed and validated for seismic design of bolted flange joints in prefabricated steel structures.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Wanqian Wang, Jingfeng Wang, Xiao Peng, Lei Guo
Summary: This paper investigates the overall response of the lightweight EPS-filled cold-formed steel (CFS) shear wall structure to earthquake disasters. A simplified analysis model is established using a strut and tie-equivalent spring model. Nonlinear analysis is conducted to assess the seismic resilience of this type of residence. The research findings provide important guidance for the nonlinear analysis and seismic resilience assessment of this kind of building.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Hui Zhao, Zhenhe Wang, Wenhao Zhang, Rui Wang, Dongdong Yang, Dennis Lam
Summary: In this study, the post-fire performance of round-ended recycled aggregate concrete-filled steel tubular (RE-RACFST) short columns was investigated through experiments and numerical simulations. The results showed that an increase in the recycled aggregate content led to a decrease in the bearing capacity and elastic stiffness of the RE-RACFSTs, as well as an earlier onset of the confining effect. Finite element models were also established and used to study the effects of key factors on the residual load-carrying capacity. Furthermore, a simplified formula was proposed to estimate the post-fire residual capacity of RERACFST stub columns.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Chengjun Tan, Tao Sun, Hua Zhao, Lei Tu, Dongqin Qiao, Xudong Shao
Summary: By combining UHPC layer with steel plates and RC structures, the proposed strengthening method effectively enhances the shear capacity of pre-damaged RC beams. The experimental results demonstrate promising applications for strengthening old/defective bridges.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Shujun Hu, Yuan Liao, Sizhi Zeng, Hai Huang, Yujie Yu
Summary: In this study, a new cross-section-type shear connector connection was proposed to improve the shear resistance in a prefabricated concrete frame-eccentrically steel brace structure. Experimental tests and numerical simulations were conducted, revealing that increasing the concrete strength, connector number, and connector section dimensions can enhance the shear stiffness and strength.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Yong Wang, Yong Du, Shaojun Zhu, Lei Huang
Summary: This study investigated the influence of temperature on the anti-sliding performance of prestressed parallel wire strand clamps (PWSCs) through experiments and numerical analyses. The study found that the anti-sliding resistance of the clamps decreases at high temperatures, the fire resistance time decreases with higher thrusting load levels, and the bolt pretension also decreases.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
Article
Construction & Building Technology
Hongbo Liu, Yixiao Zhou, Fei Wang, Yan Lu, Zhihua Chen
Summary: This study investigates the effects of low temperature and corrosion on the impact toughness of steel structures. It is found that both low temperature and corrosion can reduce the impact energy of the steel, with corrosion having a greater impact at low temperature.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2024)
