Article
Construction & Building Technology
Biao Nie, Shanhua Xu, Zongxing Zhang, Anbang Li
Summary: The study investigated the effects of corrosion on the surface morphology characteristics and mechanical properties of corroded cold-formed steel. Results showed that the reduction in elastic modulus, yield strength, and ultimate strength of hot-rolled steel after corrosion was lower than that of cold-formed steel. The finite element model accurately predicted the failure modes and stress-strain curves of corroded specimens.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Biao Nie, Shanhua Xu, WeiCheng Hu, HuaPeng Chen, AnBang Li, ZongXing Zhang
Summary: This study mainly investigates the elastic local buckling behavior of corroded cold-formed steel (CFS) columns under long-term corrosive environment. Surface morphology scanning test and thin shell finite element (FE) eigen-buckling analysis were performed to study the influence of corrosion characteristics on the buckling behavior. It was found that the deformation area of local buckling was located at the plates with the minimum average section area, and the main buckling shape changed with the increase in corrosion area length. The elastic local buckling stress decreased gradually with the increase in corrosion area width and length. The proposed formulas for calculating the buckling stress of corroded plates and columns were accurate according to extensive parameter studies.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Marine
Biao Nie, Shanhua Xu, Huapeng Chen, Min Xia, Wenjie Guo
Summary: This study investigates the effect of corrosion on the bearing capacity of cold-formed steel channel section columns. Through experiments and finite element modeling, it is found that corrosion leads to increased geometric imperfections, early occurrence of distortional buckling deformation, and the failure locations are mainly related to flange corrosion.
Article
Materials Science, Multidisciplinary
Shidong Wang, Hamid Niazi, Lyndon Lamborn, Weixing Chen
Summary: This study demonstrated for the first time the strain-shock effect associated with steels having discontinuous yielding under load-control, which substantially enhanced the early stage crack initiation and growth in high pH stress corrosion cracking scenarios.
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, Multidisciplinary
Xiaocheng Zhang, Kaishu Guan, Jiru Zhong, Guoyao Chen, Wulin Wang, Qiongqi Wang
Summary: Instrumented indentation testing (IIT) is commonly used for investigating the mechanical properties of steels. When traditional specimens are not available, a constitutive model independent technique called macro-pillar compression testing (MPCT) can be employed, with good agreement between MPCT results and round bar tensile test results for different types of steel.
Article
Materials Science, Multidisciplinary
Shidong Wang, Lyndon Lamborn, Weixing Chen
Summary: The influence of prior cyclic loading on the growth of Stage-1b stress corrosion cracking (SCC) in X52 pipeline steels was investigated. The results showed that pre-cyclically-loaded specimens exhibited Stage-1b SCC growth under subsequent cyclic loading, while those without pre-cyclic-loading did not. Large magnitude of prior stress cycles favored the growth and transition of SCC cracks. Intergranular attack by static corrosion had minimal contribution to Stage-1b crack growth. Prior cyclic loading plus heat treatment facilitated strain-aging-assisted SCC crack growth. Removal of the plastically deformed regions before re-coating could reduce cracking susceptibility.
Article
Materials Science, Multidisciplinary
Ihho Park, Eun-Young Kim, Won-Jon Yang
Summary: This study explored the cracking behavior of AISI 304 stainless steel in a high temperature MgCl2 solution over time. It was found that strain-induced martensitic transformation negatively impacts stress corrosion cracking, with transgranular cracking occurring at the cold-formed section of the reactor.
Article
Construction & Building Technology
Weiyong Wang, Ziqi Wang, Zhanshuo Liang, Lei Xu
Summary: This paper experimentally studied the mechanical properties of cold-formed Q345 steel at different temperatures, showing that tensile strain rate and specimen width have some influence on its properties, and necking phenomenon is more noticeable at high temperatures. The test results also indicated that the elastic modulus obtained from the test is higher than those obtained from the design standards.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Gong -Wen Li, Zhi-Xiao Wu, Dong-Hui Wen, Jian-Feng Shao, Chuan-Xin Hu
Summary: There is limited research on the cold-forming effect of high strength cold-formed steel sections. This study conducted experiments to investigate the material properties and residual stress, and studied the impact of residual stress on the overall stability bearing capacity.
Article
Construction & Building Technology
Jia-Bao Yan, Yan-Li Luo, Xuchuan Lin, Yun-Biao Luo, Lingxin Zhang
Summary: The mechanical properties of HSS Q690/Q960 were studied at low temperatures in Arctic conditions, showing an increase in modulus, yield and ultimate strength without a reduction in ductility, and no brittle fractures were observed. Constitutive models for HSS Q690/Q960 at low temperatures were developed, which reasonably estimated their mechanical properties.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Anna Dobkowska, Agata Sotniczuk, Piotr Bazarnik, Jaroslaw Mizera, Halina Garbacz
Summary: The corrosion behavior of AA5457 alloy sheet is complex and involves trenching around coarse Si-rich particles, crystallographically-grown large pits, and the formation of multiple tiny pits around Si-rich nanoparticles. Bending AA5457 changes the shape and distribution of Si-rich coarse particles, increases the dislocation density in the material, especially around Si-rich nanoparticles, all leading to a lower corrosion behavior in the bending area.
Article
Engineering, Mechanical
Longjun Chen, Baojun Dong, Wei Liu, Fei Wu, Hai Li, Tianyi Zhang
Summary: Oxygen contamination accelerates the generation of corrosion products and degradation of original products during CO2 pre-corrosion, promoting the corrosion process. In the first 24 hours, the general corrosion rate of 3Cr steel is higher than that of X70, but Cr's self-repairing can mitigate corrosion failure, making the general corrosion rate of 3Cr lower than X70 after 24 hours.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Composites
Yingxiang Li, Hui Lu, Zhong-Yan Zhang, Hong Liu, Zhao-Yan Sun
Summary: We studied the formation of cross-linked network material through the chains end-group reaction of grafted nanoparticles using molecular dynamics simulation. Our findings suggest that a reaction-limited process is more preferable for fabricating a crosslinked network structure with relatively homogeneous crosslinking points. Additionally, the length of grafted chains plays a crucial role in regulating the distribution of crosslinking points and the mechanical properties of composite materials.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Civil
Man-Tai Chen, Madhup Pandey, Ben Young
Summary: This paper investigates the mechanical properties of CFSSOHS members after fire exposure, proposes empirical equations to predict residual mechanical properties, and compares the microstructures of fire-exposed and non-exposed CFSSOHS members using a scanning electron microscope.
THIN-WALLED STRUCTURES
(2021)
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)