Journal of Constructional Steel Research最新文献_第3页

Triple-actuator apparatus for strength experiments of cold-formed steel members in combined loadings 用于冷弯型钢构件在组合载荷下进行强度实验的三驱动装置

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-18 DOI: 10.1016/j.jcsr.2024.109150

Duy Khanh Pham , Cao Hung Pham , Gregory J. Hancock , Colin A. Rogers

{"title":"Triple-actuator apparatus for strength experiments of cold-formed steel members in combined loadings","authors":"Duy Khanh Pham , Cao Hung Pham , Gregory J. Hancock , Colin A. Rogers","doi":"10.1016/j.jcsr.2024.109150","DOIUrl":"10.1016/j.jcsr.2024.109150","url":null,"abstract":"<div><div>Cold-formed steel members are likely to undergo complex combinations of loadings such as bending, shear, and compression. In the literature, numerous test rigs have been developed to test members subject to both isolated and combined actions. These apparatuses are commonly employed for testing combined two actions, such as shear-bending and bending-compression. However, as of today, there is no test rig specifically designed for more complex combined actions including compression, bending and shear. This paper introduces an innovative experimental apparatus namely a “Triple-Actuator Test Rig”, recently developed at the University of Sydney, with a focus on investigating the ultimate behaviour of cold-formed steel channel sections subjected to combined actions of shear, bending and compression. The combined shear and bending is conducted by using two vertical dual actuators, and the axial compression force is applied using an additional horizontal actuator. To elucidate the mechanism of the new apparatus in capturing various combinations of actions, linear static analyses are performed under different cases of combined loadings. Furthermore, detailed information on test controls and procedures is provided. An experimental validation is also conducted to demonstrate the performance of the test rig in investigating not only pure actions but also complex combinations of actions.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109150"},"PeriodicalIF":4.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cyclic behavior of steel self-centering prestressed beam-column connection with weakened FCP 削弱 FCP 的钢自定心预应力梁柱连接的循环行为

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-17 DOI: 10.1016/j.jcsr.2024.109153

Zi-Qin Jiang , Zi-Yao Niu , Xiao-Feng Yang , Zhong-Shuai Yang , Taichiro Okazaki

引用次数: 0

An effective stress approach for the design of rectangular hollow section flexural members with slender elements 设计带有细长构件的矩形空心截面抗弯构件的有效应力法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-16 DOI: 10.1016/j.jcsr.2024.109143

Brendan Richards , Kamran Tayyebi , Min Sun , Kyle Tousignant

引用次数: 0

Machine learning for ULCF life prediction of structural steels with synthetic data 利用合成数据对结构钢的 ULCF 寿命进行机器学习预测

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-16 DOI: 10.1016/j.jcsr.2024.109152

Mingming Yu , Shuailing Li , Xu Xie

{"title":"Machine learning for ULCF life prediction of structural steels with synthetic data","authors":"Mingming Yu , Shuailing Li , Xu Xie","doi":"10.1016/j.jcsr.2024.109152","DOIUrl":"10.1016/j.jcsr.2024.109152","url":null,"abstract":"<div><div>Machine learning (ML) has gradually developed into an effective method for fatigue life prediction. However, training an accurate and robust ML model is challenging when the data points resulting from expensive tests are scarce. This study proposed and validated of using synthetic ultra-low cycle fatigue (ULCF) life data generated by tabular generative adversarial network (GAN) as input for ML models. The ULCF life prediction using synthetic data was conducted for structural steels through artificial neural network (ANN) and multi-fidelity deep neural network (MFDNN). The results demonstrated that the ANN_Syn model trained with original experimental data plus synthetic data possessed higher mean value and lower standard deviation of <em>R</em><sup>2</sup> in ULCF life prediction, compared to the ANN model trained with original experimental data only. The pioneeringly constructed MFDNN model with synthetic data by tabular GAN can generally have good predictive performance. The synthetic data size had more significant influence on the predictive ability of MFDNN model than that of ANN_Syn model. The results of this study will promote the application of ML models on ULCF life prediction of structural steels, thereby greatly reducing the cost of parameters calibration of models for ULCF damage evaluation of steel structures.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109152"},"PeriodicalIF":4.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Investigations on Structural Behaviour of Reusable Interlocking Steel column base Connection with Demountability 具有可拆卸性的可重复使用联锁钢柱底座连接结构行为的实验研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-16 DOI: 10.1016/j.jcsr.2024.109146

Aswin Kumar Rajakala Jeyabalan , Sivaganesh Kanmani Selvaraj , Tak-Ming Chan

{"title":"Experimental Investigations on Structural Behaviour of Reusable Interlocking Steel column base Connection with Demountability","authors":"Aswin Kumar Rajakala Jeyabalan , Sivaganesh Kanmani Selvaraj , Tak-Ming Chan","doi":"10.1016/j.jcsr.2024.109146","DOIUrl":"10.1016/j.jcsr.2024.109146","url":null,"abstract":"<div><div>Implementing a circular economy in construction is one of the potential approaches to limit the natural resource consumption by the construction industry and construction waste generation after demolition. There exist necessities for constructing buildings with easier demountability and direct reusability. One of the key aspects of reuse is designing with structural connections for demountability after service life, rendering the buildings for reuse. Therefore, this study endeavours to develop a directly reusable interlocking hold-down type column base connection for steel structures through full-scale experimental and theoretical investigations. The new reusable column base connection consists of a connector plate to replace the anchor rods in the traditional exposed column base connections to connect the concrete footing with the steel column and base plate assembly. This paper investigates the structural behaviour of the new reusable column base connection subjected to monotonic lateral loading and determines the effective embedment depth required for the connector to avoid concrete failure. A loading protocol that signifies reuse through repeated loading sequences is adopted for this study. Thus, each specimen is loaded for three repeated reuse cycles. A theoretical method based on the traditional component model concept representing the connection components as a combination of spring assembly is developed to predict the initial elastic stiffness of the connection. This will consequently aid in estimating the lateral displacement occurring for the corresponding design load. The theoretically predicted stiffness values are in good correlation with the experimental results. The design example for stiffness calculation is also provided for industrial practical applicability.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109146"},"PeriodicalIF":4.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic performance of wall plate supported semi-rigid steel frames with a novel type of wall-beam connector 采用新型墙梁连接器的墙板支撑半刚性钢架的抗震性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-16 DOI: 10.1016/j.jcsr.2024.109161

Wei Bao , Sheng Long , Dongying Liu , Zhiwei Yu , Jiaopeng Fang , Wenzhe Lin

{"title":"Seismic performance of wall plate supported semi-rigid steel frames with a novel type of wall-beam connector","authors":"Wei Bao , Sheng Long , Dongying Liu , Zhiwei Yu , Jiaopeng Fang , Wenzhe Lin","doi":"10.1016/j.jcsr.2024.109161","DOIUrl":"10.1016/j.jcsr.2024.109161","url":null,"abstract":"<div><div>This study focuses on investigating the seismic performance of semi-rigid steel frames (SSFs) reinforced with wall plates and a novel wall-beam connector (WBC). The aim is to address the inherent limitations of these frames regarding lateral resistance and susceptibility to local instability. To evaluate the effectiveness of the proposed reinforcement, three specimens were subjected to pseudo-static cyclic loading. One specimen represented a standard SSF without wall plates, while the other two specimens were supported by wall plates with WBCs of different thicknesses (3 mm and 5 mm). The comparative analysis of the three specimens revealed significant improvements in seismic performance and energy dissipation capacities resulting from the inclusion of the WBCs. The WBCs facilitated displacement deformation, effectively mitigating structural damage caused by seismic forces. Notably, the introduction of WBCs led to a substantial increase in initial stiffness (45.2 % for WBC1 and 111.3 % for WBC2) and a significant enhancement in ultimate bearing capacity (251.9 % increase for WBC2) compared to the standard SSF. The thickness of the WBCs emerged as a crucial factor in regulating the load-bearing capacity, stiffness, and energy dissipation of the structure. The integration of WBCs ensured stable load-bearing functionality for both the frame and wall plate, effectively utilizing the material properties of each component. This configuration enhanced the lateral stiffness and hysteretic behavior of the structure, facilitating staged and incremental yielding and plastic energy dissipation under varying inter-story drifts.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109161"},"PeriodicalIF":4.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HGYF based ultimate bearing capacity analysis of rectangular CFST trusses 基于 HGYF 的矩形 CFST 桁架极限承载力分析

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-15 DOI: 10.1016/j.jcsr.2024.109154

Weiwei Xie , Jian Wang , Yan Rong , Wei Zhang , LuFeng Yang

{"title":"HGYF based ultimate bearing capacity analysis of rectangular CFST trusses","authors":"Weiwei Xie , Jian Wang , Yan Rong , Wei Zhang , LuFeng Yang","doi":"10.1016/j.jcsr.2024.109154","DOIUrl":"10.1016/j.jcsr.2024.109154","url":null,"abstract":"<div><div>An efficient and high-precision linear elastic iterative method is proposed for ultimate bearing capacity analysis of rectangular concrete-filled steel tube (CFST) trusses, based on the homogeneous generalized yield function (HGYF). Firstly, a fiber model method is developed for evaluating the bearing capacity of rectangular CFST members under combined compression and bending. The influence of material strength and cross-sectional geometric parameters on HGYF of rectangular CFST members is investigated, and the main influencing factors are determined. Then, a HGYF for rectangular CFST members with wide applicability is formulated, based on which the element bearing ratio is defined and a linear elastic iterative method for ultimate bearing capacity analysis of rectangular CFST trusses is introduced on the basis of the elastic modulus reduction method. Finally, the results of the proposed method are compared with test data, generalized yield function (GYF) based results and the results from the traditional incremental nonlinear finite element method (INFEM). Results indicate that the presented HGYF can accurately predict the ultimate bearing capacity of rectangular CFST members while effectively addressing the limitations of GYF. Meanwhile, the proposed HGYF based method agrees well with the test results with high accuracy and efficiency, and can accurately identify the high and low bearing members of truss structure.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109154"},"PeriodicalIF":4.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A decomposition method for form-finding of circular hybrid cable-truss structures considering self-weight 考虑自重的圆形混合索-桁架结构形式求解分解法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-15 DOI: 10.1016/j.jcsr.2024.109160

Zhenhua Wang , Zhihong Zhang , Zhangli Peng , Xinran Wang , Jiankai Chen , Xinzan Hu

{"title":"A decomposition method for form-finding of circular hybrid cable-truss structures considering self-weight","authors":"Zhenhua Wang , Zhihong Zhang , Zhangli Peng , Xinran Wang , Jiankai Chen , Xinzan Hu","doi":"10.1016/j.jcsr.2024.109160","DOIUrl":"10.1016/j.jcsr.2024.109160","url":null,"abstract":"<div><div>A hybrid cable-truss structure has been previously utilized in the Maracana Stadium. There are two ways to design the initial prestress distribution in the hybrid cable-truss structure, taking into account the functionality of the upper and lower hoop cables. This study proposes a decomposition method for determining the form-finding of circular hybrid cable-truss structures with two different prestress distributions. The hybrid cable-truss structure is decomposed into the inner and outer cable-truss structures. The PBS (partial balance strategy) method is employed to design the prestress and shape of both the inner and outer cable-truss structures with consideration of self-weight. A detailed prestress and shape design analysis of a circular hybrid cable-truss structure with two prestress distributions is conducted, and the precision of the initial prestress design is analyzed. The illustrative example presented herein demonstrates that the proposed method, combined with the PBS method, provides a simple and accurate approach for the form-finding of hybrid cable-truss roof systems subject to self-weight.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109160"},"PeriodicalIF":4.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control accuracy and sensitivity of a double rhombic-strut adaptive beam string structure 双菱形支杆自适应梁弦结构的控制精度和灵敏度

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-15 DOI: 10.1016/j.jcsr.2024.109166

Jun Zou , Jinyu Lu , Na Li , Haichen Zhang , Zhicheng Sha , Zhiyin Xu

{"title":"Control accuracy and sensitivity of a double rhombic-strut adaptive beam string structure","authors":"Jun Zou , Jinyu Lu , Na Li , Haichen Zhang , Zhicheng Sha , Zhiyin Xu","doi":"10.1016/j.jcsr.2024.109166","DOIUrl":"10.1016/j.jcsr.2024.109166","url":null,"abstract":"<div><div>The control accuracy and sensitivity of active struts in traditional adaptive beam string structures (ABSS) pose significant challenges to meeting the control requirements in different working states, which will seriously limit its adaptability to various external environments. To address this issue, a double rhombic active strut adaptive beam string structure (DRSABSS) was developed. To analyze the working mechanism of the double rhombic active strut and its feasibility in structural active control, its geometric deformation model was established, and the design formula was derived. The experiments and numerical simulations were conducted on a scaled model of the DRSABSS under different load cases. A control strategy that minimizes displacement considering control accuracy and sensitivity was proposed based on a genetic algorithm (GA). The test and simulation results showed that the initial angle of the double rhombic active strut was a crucial factor in determining its control function, and the accuracy of its design formula was verified. Additionally, the structural responses were significantly reduced after active control, and the double rhombic active struts can improve the structural control accuracy and sensitivity simultaneously, and the flexible switching of control modes under different requirements in real-time can be achieved. The test results were in good agreement with the simulation results. The rhombic amplification mechanism of DRSABSS proposed in this paper provides a new approach to improve the control accuracy and sensitivity of adaptive structures, and it can be applicable to the control requirements under different loads.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109166"},"PeriodicalIF":4.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Post-fire compressive performance of basalt fiber recycled aggregate concrete filled steel tube 填充钢管的玄武岩纤维再生骨料混凝土的火后抗压性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-15 DOI: 10.1016/j.jcsr.2024.109164

Qinglin Jia , Lin Xiao , Heng Liu , Xing Wei , Zhirui Kang

{"title":"Post-fire compressive performance of basalt fiber recycled aggregate concrete filled steel tube","authors":"Qinglin Jia , Lin Xiao , Heng Liu , Xing Wei , Zhirui Kang","doi":"10.1016/j.jcsr.2024.109164","DOIUrl":"10.1016/j.jcsr.2024.109164","url":null,"abstract":"<div><div>This study reports the results of post-fire axial compressive tests on 87 basalt fiber recycled aggregate concrete (BFRAC) cubes and 25 basalt fiber recycled aggregate concrete filled steel tube (BF-RACFST) short columns. The variables were temperature (20, 300, 500, and 800 °C), recycled aggregate replacement ratio (0, 50, and 100 %), basalt fiber content (0, 4, and 8 kg/m<sup>3</sup>), and cooling method. The specimens were firstly heated at constant high temperatures. After cooling to room temperature, the axial compression tests were conducted. The findings revealed that recycled aggregate prevented explosive spalling of BFRAC but reduced the post-fire capacity and stiffness of BF-RACFST. Adding basalt fiber increased the compressive strength of BFRAC cubes, decreased BF-RACFST post-fire capacity, and slightly increased the post-fire compressive stiffness of the short columns. After cooling in water, the load and failure capacity of BF-RACFST were lower than those of natural cooling. Since structures are employed in the elastic phase under normal working conditions, adding basalt fiber can compensate for the compressive stiffness loss caused by recycled aggregate in concrete filled steel tubes after high temperatures. However, the reduction in capacity safety reserves should be considered when designing and post-fire repairing. If circumstances allow, rapid cooling methods, such as water cooling, should be avoided during fire extinguishing to reduce structural strength loss. Eventually, a design model was built to calculate the residual strength, compressive stiffness, and peak strain of the post-fire BF-RACFST short columns.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"224 ","pages":"Article 109164"},"PeriodicalIF":4.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0