Article
Engineering, Civil
Jelena Dobric, Aljosa Filipovic, Nancy Baddoo, Zlatko Markovic, Dragan Budevac
Summary: A comprehensive numerical investigation has been conducted to provide design recommendations for cold-formed stainless steel equal-leg angle columns, covering a wide range of crosssection sizes, slenderness values, and stainless steel grades. The proposed design procedures have been confirmed to be suitable through reliability assessment.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Lulu Zhang, Yukai Zhong, Ou Zhao
Summary: This paper investigates the cross-section behavior and resistances of press-braked stainless steel channel sections under combined compression and major-axis bending moment through experimental and numerical studies. The existing design methods were found to be too conservative for predicting the resistance of these sections, and improved design methods were proposed for more accurate predictions.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Engineering, Civil
Behnam Behzadi-Sofiani, Leroy Gardner, M. Ahmer Wadee
Summary: This study investigates the stability and design of fixed-ended stainless steel equal-leg angle section members under axial compression. Experimental testing and numerical validation demonstrate the accuracy of the proposed design approach, offering improved strength predictions compared to existing rules. The new design provisions for stainless steel sections are verified to have enhanced reliability under the recommended partial safety factor.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Behnam Behzadi-Sofiani, Leroy Gardner, M. Ahmer Wadee
Summary: This study investigates the stability and design of stainless steel equal-leg angle section members under uniaxial bending through experiments and numerical simulations. The results show that different buckling modes occur for equal-leg angle sections under different bending directions, with lateral-torsional buckling and Brazier-type flattening observed under minor-axis bending. New design rules are proposed to achieve more accurate and consistent resistance predictions compared to existing provisions.
Article
Engineering, Civil
Jelena Dobric, Aljosa Filipovic, Nancy Baddoo, Dragan Budevac, Barbara Rossi
Summary: This paper investigates the structural behavior and design of equal-leg stainless steel angle columns fabricated by laser-welding or hot-rolling process under pure axial compression. It identifies the need for improvements in conservative and scattered resistance predictions from North American design procedures and proposes new design criteria for inclusion in the European structural stainless steel design code. Statistical reliability analyses confirm their suitability for the European standards.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Fei Yin, Lu Yang, Kelong Xu, Jie Wang, Junwei Fan
Summary: This paper reports an experimental and numerical study on the residual stresses and the cross-sectional behavior of Q1100 ultrahigh strength steel welded I-sections. It proposes a new modified design method and validates its accuracy through reliability analyses.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Jun-zhi Liu, Shuxian Chen, Tak-Ming Chan
Summary: Comprehensive experimental and numerical investigations on hybrid T-section stub columns were conducted, and the results showed that the strength predictions from design codes were consistent and reliable. Modifications on the Direct Strength Method and Continuous Strength Method were proposed.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Behnam Behzadi-Sofiani, M. Ahmer Wadee, Leroy Gardner
Summary: This study investigates the behavior and design of pin-ended stainless steel equal-leg angle section members under compression and compression plus minor-axis bending. Experimental investigation, numerical modeling, and design proposals are presented. The proposed design rules show more accurate and consistent resistance predictions compared to existing codified design rules and are verified through physical experiments and numerical results.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Construction & Building Technology
Peng Dai, Lu Yang, Jie Wang, Keyang Ning, Yi Gang
Summary: Concrete-filled square stainless steel tubes (CFSSST) have great potential in constructional applications due to their large flexural stiffness, high corrosion resistance, and low maintenance cost. This paper presents a comprehensive experimental and numerical study on CFSSST stub columns, investigating their ultimate capacities and comparing results with design guides. The study suggests improved calculation methods that provide more accurate estimations of the ultimate resistances of CFSSST stub columns, validated by comparison with test results.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
M. Anbarasu, M. Subalakshmi, M. Adil Dar, M. F. Hassanein
Summary: This paper investigates the numerical axial behavior of cold-formed ferritic stainless steel stub columns with circular perforations. Finite element models are used to validate the accuracy of the models, and parametric analysis is performed to determine the design rules for the compression capacity of perforated CFFSS columns. New design recommendations are proposed for accurate compression strength predictions.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Behnam Behzadi-Sofiani, Leroy Gardner, M. Ahmer Wadee
Summary: This study investigates the stability and design of steel equal-leg angle section members subjected to uniaxial bending. Experimental investigations and numerical analyses are conducted to validate the proposed design rules, which offer more accurate and consistent resistance predictions compared to existing codified design rules. The reliability of the proposed design provisions is verified following the EN 1990 procedure.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Feng Zhou, Lalita Lama, Kaizhu Zhao
Summary: This paper presents a concrete filled double-skin tubular (CFDST) stub column, with outer stainless steel circular hollow section (CHS) and inner carbon steel CHS. Finite element analysis is conducted to verify the structural performance and investigate the mechanical properties of the sandwiched concrete. Different design methods are assessed to evaluate their applicability and accuracy, and a new design method for calculating the ultimate bearing capacity of the CFDST stub column is proposed.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Huiyong Ban, Yixiao Mei
Summary: This paper addresses the local buckling behavior and design of built-up square hollow section (SHS) stub columns made of stainless-clad (SC) bimetallic steel through experimental and numerical investigations. The study includes testing and analysis of seven stub column specimens fabricated from hot-rolling bonded SC bimetallic steel plates. Accurate measurements of dimensions and geometrical imperfections were conducted using a non-contact 3D laser scanner, and the data was processed to provide a more accurate analysis. Finite-element (FE) models were developed and validated using the scanned data, and comprehensive parametric studies were carried out to evaluate the applicability of current design methods. Proposed design methods, including a normalized slenderness limit and an effective width formula, showed improved efficiency and consistency and can be used in the future application of SC bimetallic steel structures.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Shuai Li, Ou Zhao
Summary: This paper presents experimental and numerical investigations on the behavior and resistances of hot-rolled austenitic stainless steel channel section stub columns after exposure to fire. The experimental program included heating, cooling, and testing of the specimens, while the numerical modeling program involved validating finite element models with the test results. The study evaluated the applicability of design interaction curves for eccentrically loaded stainless steel columns and proposed new design curves that provided more accurate and consistent predictions.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Construction & Building Technology
Marios-Zois Bezas, Jean-Francois Demonceau, Ioannis Vayas, Jean-Pierre Jaspart
Summary: This study conducted extensive numerical and experimental studies on angle profiles to propose a complete set of design rules validated for resistance and stability, written in the format of Eurocode 3 for direct inclusion in future drafts, aiming to improve construction accuracy and efficiency.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Engineering, Civil
Ke Jiang, Yating Liang, Ou Zhao
Summary: The existing standard framework for the design of high strength steel bolted connections is tedious and inaccurate. This paper introduces a predictive framework based on machine learning, which collects a large amount of data and develops models for more accurate predictions of failure load and mode.
THIN-WALLED STRUCTURES
(2022)
Article
Construction & Building Technology
Hanjie Qian, Ye Li, Jianfei Yang, Lihua Xie, Kang Hai Tan
Summary: In this paper, an automatic segmentation framework is proposed for the analysis of concrete micro structure using scanning electron microscopy (SEM) images. The PointRend algorithm is optimized to improve prediction accuracy, especially around boundaries. The results show that the proposed algorithm outperforms other segmentation methods.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Marine
Haijia Huang, Chen Jia, Ou Zhao, Lanhui Guo
Summary: This paper investigates the surface morphology of low carbon steel plates with local corrosion. Copper-accelerated acetic acid salt spray tests were conducted on 24 steel plate specimens with different corrosion parameters, and the 3D morphology of the corroded surfaces was observed, extracted, and analyzed. Statistical analysis reveals that the local corrosion surface can be divided into a central flat corroded zone and an edge corroded zone, with the width of the edge corroded zone remaining constant regardless of the corrosion area. Finite element models developed using ABAQUS software showed good agreement with the tensile test results, providing a simplified approach for predicting the properties of locally corroded steel plates.
Article
Engineering, Civil
Shuai Li, Ke Jiang, Ou Zhao
Summary: This study investigates the buckling behavior and resistance of press-braked ferritic stainless steel slender channel section beam-columns under compression and bending moment through experimental and numerical methods. Experimental tests and numerical modeling were conducted, and existing design interaction curves were evaluated to be conservative and scattered. An improved design interaction curve was developed and shown to offer more accurate and consistent resistance predictions. Statistical analyses were performed to confirm the reliability of the new proposal.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Lulu Zhang, Andi Su, Ou Zhao
Summary: This paper investigates the flexural-torsional buckling behavior and resistance of pin-ended press-braked S690 high strength steel angle section columns through experimental and numerical research. It compares the accuracy of resistance predictions using different design rules and a DSM-based design approach.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Lulu Zhang, Yukai Zhong, Ou Zhao
Summary: This study investigates the flexural buckling behavior and resistance of press-braked S690 high strength steel angle section long columns through testing and numerical modeling. The evaluation results reveal that the North American specification and Australian/New Zealand standard show higher design accuracy and consistency, while the Eurocode leads to excessively conservative and scattered failure load predictions. A new design approach is proposed, which offers more accurate and consistent failure load predictions with less calculation works compared to the design codes.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Huy Tang Bui, Koichi Maekawa, Kang Hai Tan
Summary: This paper presents an experimental study on the microcell and macrocell corrosion kinetics of steel bars in reinforced concrete slabs under three different corrosive environments and configurations of uncorroded/corroded steel bars. The combined effects of chloride contamination and carbonation were found to induce higher corrosion rates compared to individual causes. It was also observed that when corroded steel bars were in contact, both microcell and macrocell corrosion rates increased.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Civil
Yonghui Xing, Ou Zhao, Weiyong Wang
Summary: The cold-formed steel center-sheathed shear wall (CFSCSSW) was tested under both room temperature and fire conditions to evaluate its load-bearing capacity and fire behavior. Finite element models were developed to study the effects of vertical and lateral loads as well as sheathing thickness on the wall's fire performance. The research findings showed that the temperature distribution along the wall section is non-uniform, with significant differences between the hot and cold flanges. The vertical load ratio had a greater influence on fire resistance compared to the lateral load ratio, and the presence of interior studs improved the wall's fire resistance. Aspect ratio had minimal effect on fire resistance, and the failure model depended on the load direction and aspect ratio. Based on the parametric studies, a sheathing thickness of 0.8 mm was recommended for CFSCSSWs.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Shuai Li, Andi Su, Ou Zhao
Summary: The paper presents experimental and numerical studies on the structural behavior and resistances of press-braked austenitic stainless steel slender channel section beam-columns. The experimental program includes measurements of initial geometric imperfections and ten beam-column tests, while the numerical modeling program consists of finite element models validated against the test results and parametric studies. The obtained data are used to assess the design interaction curves provided in different codes and standards. A new design interaction curve is proposed to address the shortcomings of the codified design curves.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Yukai Zhong, Andi Su, Ou Zhao
Summary: This paper investigates the local buckling behavior and compression resistances of cold-formed S700 high strength steel circular hollow sections (CHS) after exposure to elevated temperatures. Experimental and numerical studies were conducted, and finite element models were developed to simulate the test responses and generate numerical data over a wide range of cross-section dimensions. The applicability of existing design rules for ambient temperature conditions to cold-formed S700 high strength steel CHS after exposure to elevated temperatures was evaluated using post-fire material properties. The findings indicate that the codified slenderness limits were generally accurate for cross-section classification, but the predicted compression resistances were conservative for non-slender CHS and slender CHS after exposure to high temperatures.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Ben Mou, Xu Liu, Ou Zhao, Henglin Xiao
Summary: The present study investigates the dynamic response of square concrete-filled steel tubular (CFST) columns under lateral impact in different directions through drop hammer tests at flat or corner zones. The experimental results demonstrate that the impact zone significantly affects the dynamic response of CFST specimens, with specimens impacted at corner zones more likely to fracture on the tensile side of the steel tube under higher impact energies. Furthermore, specimens impacted at the corner zone are more sensitive to changes in indenter radius. Smaller shear span ratios, built-in steel bars, and larger column sizes improve the impact resistance of the tested specimens.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Shuai Li, Yating Liang, Ou Zhao
Summary: This paper presents experimental and numerical studies on the flexural buckling behaviour and residual resistances of hot-rolled stainless steel channel section columns after exposure to elevated temperatures. 'C'-shaped and 'reverse C'-shaped flexural buckling were observed in the experiments. Finite element models were developed and validated, and the applicability of existing design standards for ambient temperature buckling curves were evaluated. The evaluation results showed accurate predictions for 'C'-shaped flexural buckling, but slightly conservative predictions for 'reverse C'-shaped flexural buckling.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Shuai Li, Yating Liang, Ou Zhao
Summary: This paper presents experimental and numerical investigations into the cross-section behaviour and resistance of press-braked ferritic stainless steel channel sections under combined compression and major-axis bending moment. The evaluation results revealed that the American specification resulted in a good level of design accuracy, while the European code led to conservative resistance predictions. New design interaction curves were also developed and shown to offer more accurate and consistent resistance predictions.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Jun Ye, Yunyi Liu, Yuanzhang Yang, Zhen Wang, Ou Zhao, Yang Zhao
Summary: Capitalizing on Wire and Arc Additive Manufacturing (WAAM), 3D printed steel has shown significant potential in manufacturing large-scale steel structural elements in the construction industry. This research focuses on the mechanical performance and failure modes of WAAM steel connections, as well as the evaluation of current design provisions and approaches. The study reveals the influence of anisotropic material properties and failure modes on the accuracy of predicting the ultimate capacity of WAAM steel connections, highlighting the need for further research on this topic.
ENGINEERING STRUCTURES
(2023)
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)
