Structures最新文献

{"title":"Analysis and design of wide rectangular concrete-filled steel tubular columns under axial compression","authors":"Hongda Li ,&nbsp;Lanhui Guo ,&nbsp;Shan Gao ,&nbsp;Mohamed Elchalakani","doi":"10.1016/j.istruc.2024.107540","DOIUrl":"10.1016/j.istruc.2024.107540","url":null,"abstract":"<div><div>Wide rectangular concrete-filled steel tubular (W<em>R</em>-CFST) columns possess high bearing capacity and are convenient for furniture layout, making them suitable for high-rise residential buildings. However, its section width-to-depth ratio is beyond the limit of the code, and the current research is insufficient, which restricts its wide application. Experiments and finite element parameter analysis have been conducted to study the axial compression behavior of W<em>R</em>-CFST columns. The results indicate that the typical failure mode of all W<em>R</em>-CFST columns is bending failure about the weak axis, and W<em>R</em>-CFST columns are more susceptible to weak axis instability compared to square concrete-filled steel tubes. The force mechanism of the specimens shows that the mid-height constraint effect decreases as the section width-to-depth ratio increases. Parameter analysis results indicate that the section width-to-depth ratio negatively correlates with the ductility but has a negligible impact on stability coefficients. The constraint model proposed by Mander can effectively predict the sectional bearing capacity of W<em>R</em>-CFST columns with section width-to-depth ratios ranging from 2 to 4. The verification of the current design codes shows that most codes overestimate the stability coefficient. Based on the parameter analysis in this study, a simplified prediction formula is proposed for the stability coefficients of W<em>R</em>-CFST columns.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107540"},"PeriodicalIF":3.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552926","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}

{"title":"Seismic behavior of prefabricated fiber reinforced concrete energy-dissipation wall under cyclic loading","authors":"Yu-Ming Zhang ,&nbsp;Qing-Xuan Shi ,&nbsp;Li Xin ,&nbsp;Bin Wang ,&nbsp;Yuan Liu ,&nbsp;Peng Wu ,&nbsp;Xing-Wen Liang","doi":"10.1016/j.istruc.2024.107635","DOIUrl":"10.1016/j.istruc.2024.107635","url":null,"abstract":"<div><div>The energy dissipation devices were applied to improve the seismic performance and lateral stiffness of high-rise reinforced concrete (RC) frame. Fiber reinforced concrete (FRC) is an ideal material used as energy dissipation devices due to its strain hardening phenomenon and multi-crack development failure mode. To investigate the seismic performance of FRC energy-dissipation wall (FRCEDW), four specimens with different aspect ratio, connection method and reinforcement form were designed and fabricated. The seismic performance included damage mode, bearing capacity, deformation capacity and energy dissipation performance were investigated under cyclic test. The results show that: the FRCEDW experienced shear dominated flexural-shear failure, accompanied by a significant number of fine cracks. The specimens show good deformation capacity with a ductility coefficient greater than 2 and the equivalent viscous damping ratio greater than 0.125, which means FRCEDW can used as additional dampers in prefabricated structures. When the aspect ratio increased from 2.27 to 2.83, the ductility factor changed from 2.14 to 2.44 increased by 12.3 %. Finite element analysis was conducted using OpenSEES. The SFI-MVLEM modeling method had been proven accurately simulate the hysteresis response of FRCEDW under cyclic loading. The research results can give references to the further application of FRCEDW-RC frame structures.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107635"},"PeriodicalIF":3.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552927","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}

{"title":"Evaluation of steel ratio limits for reinforced concrete beams using reliability analysis and Bayesian methods","authors":"Oscar D. Hurtado,&nbsp;Andrés Álvarez,&nbsp;Albert R. Ortiz,&nbsp;Gilberto Areiza,&nbsp;Peter Thomson","doi":"10.1016/j.istruc.2024.107611","DOIUrl":"10.1016/j.istruc.2024.107611","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Structural codes worldwide typically limit the steel reinforcement ratio in elements to mitigate the risk of fragile failure. Notably, standard codes impose such limits; however, constant improvements in material science induce the need for standard codes to be reviewed periodically. This reassessment is important due to advancements in the nominal values of key parameters in structural design and construction, and the uncertainty reduction in material reliability attributed to advancements in manufacturing processes and quality control. This paper addresses the need for a thorough reassessment of the reliability level of steel reinforcement ratio limits in beam elements designed under the provisions of the ACI 318-19 code, given the evolving material properties. Principles of mechanics are used to get an expression of steel reinforcement ratio (&lt;span&gt;&lt;math&gt;&lt;mi&gt;ρ&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;) limits in terms of the uncertainty in material properties such as concrete and steel. Also, experimental data from multiple resources and available literature are incorporated for model validation. Specifically, compressive strength of concrete (&lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;′&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;), yield stress of steel (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;), modulus of rupture (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;r&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;), ultimate deformation of concrete (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;ɛ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;u&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;), and the ratio of the transformed area of the concrete section to its gross area (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;β&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) are treated as random variables. The investigation focuses on the compressive strength of concrete values of 28, 35, 42, and 89 MPa alongside with grade 60 and high-strength structural steel. The probability of exceedance of &lt;span&gt;&lt;math&gt;&lt;mi&gt;ρ&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; limits is calculated through Bayesian inference programming and Monte Carlo sampling. The results indicate that the minimum steel ratio (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;ρ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) limit given by ACI 318-19 is considerably higher than the obtained value by code. While the maximum steel ratio (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;ρ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) is reasonable, taking into account the balanced steel ratio (&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;ρ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;b&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) value, which gives us a maximum amount of steel that causes a ductile failure. Drawing insights from the results, novel limits may be formulated for these specific &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;′&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/ma","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107611"},"PeriodicalIF":3.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552931","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}

{"title":"Vehicle impact prevention behavior of RC bridge piers with UHPC-Bio-inspired honeycomb column thin-walled structure (UHPC-BHTS)","authors":"Hongxiang Xia ,&nbsp;Xueqian Fang ,&nbsp;Shijie Wang ,&nbsp;Quansheng Sun","doi":"10.1016/j.istruc.2024.107566","DOIUrl":"10.1016/j.istruc.2024.107566","url":null,"abstract":"<div><div>In order to reduce the damage of reinforced concrete bridge piers (RCBPs) under vehicle impact scenarios, the Ultra-high performance concrete-Bio-inspired honeycomb column thin-walled structure (UHPC-BHTS) with an attached anti-impact composite structure is designed to enable the pier to resist accidental vehicle impacts during its service life. According to the dynamic response, energy absorption characteristics, and other indicators, the impact protection effectiveness of the UHPC-BHTS composite structure on six RC column specimens with different equivalent heights from 1 to 3.5 m was evaluated. The average proportion of internal energy absorbed by the UHPC-BHTS composite structure was as high as 97.19 %. Then, 48 Ford 800 medium-sized trucks with engine tonnage of 0.64–2 tons and impact speeds of 40–140 km/h were systematically simulated for the vehicle-pier impact condition. Through the test results, it is concluded that the pier protected by the UHPC-BHTS composite structure has a lower damage level than the RCBP without a protective device and can withstand the impact of medium-sized trucks with faster and heavier engines. Finally, based on a new type of damage assessment index, the damage degree of vehicle impact on RCBP was evaluated. The work in this paper can provide a useful reference for the design of RCBP in vehicle impact protection.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107566"},"PeriodicalIF":3.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552933","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}

{"title":"Lateral stiffness of partially infilled reinforced concrete (RC) frames","authors":"Birendra Nath Singha,&nbsp;Goutam Mondal","doi":"10.1016/j.istruc.2024.107532","DOIUrl":"10.1016/j.istruc.2024.107532","url":null,"abstract":"<div><div>When infill is provided in a frame up to the full height of a column for a portion it is called a fully infilled frame (FIF). Whereas, when infill is provided up to a certain height of structural frames then it is called a partially infilled frame (PIF). Partial infills are often provided in buildings for ventilation purposes. Due to the devastating collapse of buildings in the presence of partial infill as evident from past earthquakes, researchers found it important to investigate the behavior of partial infill frames in lateral loading. The present study proposes a simplified macro modeling approach for PIFs based on finite element analysis. Different PIFs were considered based on parameters such as aspect ratio, and opening area. The study also proposes a reduction factor for the effective width of the off-diagonal strut in PIFs over that of the solid reinforced concrete (RC) infilled frame to calculate its initial lateral stiffness.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107532"},"PeriodicalIF":3.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538818","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}

{"title":"Analytical solution for triply coupled torsional-flexural forced vibrations in asymmetric thin-walled beams under harmonic moving loads","authors":"Yong Cai ,&nbsp;Xueqi Li ,&nbsp;Xiaoyong Lv ,&nbsp;Haijun Chen","doi":"10.1016/j.istruc.2024.107648","DOIUrl":"10.1016/j.istruc.2024.107648","url":null,"abstract":"<div><div>Asymmetric components, such as asymmetric U-shaped beams and steel rails, are used in track engineering and bridge construction, often resulting from construction errors, mechanical wear, or specific engineering requirements. This asymmetry can increase instability of components under moving loads and further endanger structural safety. However, there are almost no effective analytical solutions for triply coupled torsional-flexural forced vibrations of asymmetric thin-walled beams (thin-walled beams with asymmetric cross sections) due to their complexity. To address this, the study established a comprehensive analytical method for obtaining solutions for triply coupled torsional-flexural dynamic responses (beam motion caused by dynamic loads on structures). Triply coupled torsional-flexural dynamic equations were developed, considering the effects of rotary inertia and warping. The equations were then transformed into linear equations through a combination of Fourier finite integral transformation and Laplace transformation, enabling decoupling and resolution of the equations. Analytical solutions for vertical, lateral, and torsional dynamic responses were derived from this approach. To validate these analytical solutions, a new numerical method was proposed, combining the Galerkin approach with the precise integration method. On this basis, the study further explored the triply coupled torsional-flexural resonance mechanism and the influence of the warping effect on dynamic response. The results suggest that high-frequency harmonic moving loads can cause significant resonance in all three directions, while medium- and low-frequency moving loads predominantly affect one or two directions. Moreover, the warping effect's influence on dynamic responses cannot be overlooked, particularly under high-frequency or low-speed harmonic moving loads. Additionally, the effects of load velocity and frequency of harmonic moving loads on the dynamic response of this beam are interconnected.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107648"},"PeriodicalIF":3.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538844","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}

{"title":"Wind-driven oscillation and dynamic response of a Y-plan shaped tall building under interference","authors":"Niraj Sharma ,&nbsp;Himanshu Yadav,&nbsp;Amrit Kumar Roy","doi":"10.1016/j.istruc.2024.107619","DOIUrl":"10.1016/j.istruc.2024.107619","url":null,"abstract":"<div><div>This study explores the wind-driven oscillation of the Y-plan shaped tall building by utilizing unsteady Computational Fluid Dynamics (CFD) in conjunction with structural modal analysis. Because tall structures are so near to one another, wind-driven interference effects between buildings have recently gained significant attention in structural engineering for modern cities. This study examines the wind-driven oscillation and dynamic response on a stiff-scale Y-shaped tall structure due to square plan shaped interfering structure placed in close proximity. Wind speed of 50 m/s at 0°and 180° wind incidence angles are taken into consideration while validating and comparing the along and across-wind induced dynamic responses of the building models. Using the finite volume approach, the fluid flow domain is divided into a finite number of small control volumes or components for numerical analysis. Governing equations of fluid flow, such as the Navier-Stokes equations, are then solved numerically over these discrete elements. This involves iterative algorithms to approximate the solutions of these partial differential equations under specified boundary conditions and initial conditions. Using the k-epsilon turbulence model, the unsteady findings were verified against wind tunnel test data. When wind blows perpendicular to the building model's main axis, crosswind vortices can cause the model to undergo considerable aeroelastic effects that can lead to a strong resonance. As a building’s height increases, both along-wind and across-wind forces generally increase due to higher wind speeds and more pronounced aerodynamic effects. The overturning moment in a building increases with height due to the lever arm effect of lateral forces. A comparison and discussion of pressure distribution, forces, moment are conducted on the four distinct models. Furthermore, by designing tall buildings that are less susceptible to wind load and result in more occupant-friendly and energy-efficient cities, urban sustainability can be enhanced with an understanding of wind-induced response. At the end, a research roadmap is presented for this subject.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107619"},"PeriodicalIF":3.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538846","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}

{"title":"Analytical model and design method of corrugated steel-concrete composite girders under torsion","authors":"Hao Zhang ,&nbsp;Qiu Zhao ,&nbsp;Yiyan Chen ,&nbsp;Xiaojun Fang ,&nbsp;Zhaohui Yang ,&nbsp;Xiaoqiang Yang","doi":"10.1016/j.istruc.2024.107608","DOIUrl":"10.1016/j.istruc.2024.107608","url":null,"abstract":"<div><div>The torsional effect of prestressed corrugated steel-concrete composite girders (PCSCCG) is more prominent due to its low torsional stiffness, which is therefore crucial to be clarified for safe design. This paper proposed a theoretical model based on the combined actions softened-membrane model (CA-SMM) to predict the torsional response of PCSCCG. The equilibrium, compatibility and constitutive equations were established to consider the characteristics of corrugated steel webs (CSW) and prestressing effect, where a reasonable shear strain assumption was presented to determine the force behavior of concrete slabs and CSW, and the thickness of shear flow in concrete slabs was corrected. An optimized algorithm using the gradient descent method was established to improve the insufficiency and stability. Based on this, a simplified design method was proposed to rapidly evaluate the torque and twist of PCSCCG. Finally, the feasibility of the proposed model and simplified design method was verified by available tests. The superiority of the analytical model in predicting the full torsional performance of PCSCCG was proved, and the reasonability and simplicity of the simplified method in capturing the cracking, yield, and ultimate torques and twists were observed.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107608"},"PeriodicalIF":3.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538893","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}

{"title":"Numerical investigation of a new precast concrete shear wall system with horizontal connections","authors":"Qihao Han ,&nbsp;Dayang Wang ,&nbsp;Shenchun Xu ,&nbsp;Zhigang Zheng ,&nbsp;Jihua Mao","doi":"10.1016/j.istruc.2024.107616","DOIUrl":"10.1016/j.istruc.2024.107616","url":null,"abstract":"<div><div>As a series study of the seismic behavior of the new precast concrete shear wall system with horizontal connections (PSWHs) proposed based on the design concept of plastic damage relocation, this numerical study continues the previous experimental study to fully understand the structure behaviors of PSWHs under lateral low-cyclic loading and further to supplement the basic data for engineering use. A modeling strategy overcoming the convergence difficulty caused by highly nonlinear behaviors of connection joints was first proposed in this study for reference to the numerical investigations on this kind of component. A precise finite element model was developed based on the modeling strategy and validated by comparing it with experimental results. Then a parametric analysis is systematically carried out to investigate the effect of key design parameters, including the axial load ratio (ALR), the ratio of longitudinal reinforcement of the shear wall (RLR), the ratio of transfer height of the shear wall (RTH), and the ratio of embedment depth of steel connectors (RED), on the structure behaviors of PSWHs under lateral low-cyclic loading. Two failure modes including brittle shear failure mode and ductile bending failure mode were observed in the numerical simulations. The recommended values of ALR, RLR, RTH and RED were given based on the comprehensive consideration of concrete damage, energy dissipation capacity and displacement ductility to achieve the optimization of the seismic behaviors of PSWHs. The results of this study can provide technical support and a theoretical basis for the investigation or practical engineering of this kind of component.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107616"},"PeriodicalIF":3.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538851","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}

{"title":"Experimental investigation on axial compression behavior of heat-damaged concrete cylinders confined with CFRP sheets","authors":"Kang Zhao,&nbsp;Zhongjun Hu,&nbsp;Boxin Wang,&nbsp;Yuchuan Wen,&nbsp;Jingyi Han,&nbsp;Qiong Wu,&nbsp;Yan Xu","doi":"10.1016/j.istruc.2024.107560","DOIUrl":"10.1016/j.istruc.2024.107560","url":null,"abstract":"<div><div>This study focuses on the axial compression behavior of heat-damaged concrete cylinders repaired with carbon fiber-reinforced polymer (CFRP) sheets. A total of 52 specimens were tested to investigate the effects of heating temperature, CFRP layers and cooling methods on the mechanical properties of heat-damaged concrete cylinders. The test results indicated that the residual compressive strength of heat-damaged concrete with water cooling is lower than that of heat-damaged concrete with natural cooling when the exposure temperature is ≥ 400 ℃. The confinement of CFRP can enhance the residual compressive strength of heat-damaged concrete. Considering the effect of the heating temperature and cooling method, a combination model was suggested to predict the ultimate strength of heat-damaged concrete confined by CFRP sheets, as well as the accuracy and applicability of the combination model were examined and demonstrated with test results and collected experimental data.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107560"},"PeriodicalIF":3.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538890","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}