Structures最新文献

Seismic fragility analysis of wood sheathed CFS shear wall under near- and far-field earthquakes

IF 3.9 2区工程技术

Structures Pub Date : 2025-04-01 DOI: 10.1016/j.istruc.2025.108731

Mohammad Amin Fereidoony , Shahabeddin Hatami , Mojtaba Gorji Azandariani , Abdolreza Zare , Mohammad Gholami

{"title":"Seismic fragility analysis of wood sheathed CFS shear wall under near- and far-field earthquakes","authors":"Mohammad Amin Fereidoony , Shahabeddin Hatami , Mojtaba Gorji Azandariani , Abdolreza Zare , Mohammad Gholami","doi":"10.1016/j.istruc.2025.108731","DOIUrl":"10.1016/j.istruc.2025.108731","url":null,"abstract":"<div><div>Wood-based panel shear walls are among the most common lateral load-bearing systems for light steel frame (LSF) structures. While design and construction aspects have been addressed in published codes, this research aims to evaluate performance levels and their probabilities for wood-based shear wall panels, both quantitatively and qualitatively. Eighteen frames with varying characteristics, including sheathing material, screw spacing, and panel configuration, were modeled and analyzed using OpenSees software. Incremental dynamic analysis (IDA) was conducted under near-field and far-field earthquake conditions. Considering the importance of fragility curves in assessing the seismic damage of the structures, these curves were plotted and the probability of occurrence for each performance levels regarding to the intensity of various earthquakes were determined. The results reveal that near-field earthquakes impose a higher probability of structural damage, with a 20 % greater likelihood of exceeding performance thresholds at the same <em>S</em><sub><em>a</em></sub>(<em>T</em><sub><em>1</em></sub>, 5 %) compared to far-field earthquakes. Fragility curves developed for immediate occupancy (IO), life safety (LS), and collapse prevention (CP) levels indicate that the CP threshold is reached with a 50 % probability at 0.53 g for near-field and 0.77 g for far-field earthquakes in OSB-sheathed walls. The response modification factor (R-factor) was evaluated, and a value of 6.5 was found suitable for design based on FEMA P695 guidelines. This study insights for performance-based seismic design, demonstrating that parameters like sheathing material, screw spacing, and panel configuration significantly affect seismic resilience.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108731"},"PeriodicalIF":3.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748391","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

Refined finite element simulation of interfacial bond failure between rebars and concrete using parametric and reverse modeling

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-30 DOI: 10.1016/j.istruc.2025.108755

Tianxiang Wang , Zihua Zhang , Ben Yang , Taotao Cai , Zhenwen Zhang , Chunheng Zhou , Xuan Wang

{"title":"Refined finite element simulation of interfacial bond failure between rebars and concrete using parametric and reverse modeling","authors":"Tianxiang Wang , Zihua Zhang , Ben Yang , Taotao Cai , Zhenwen Zhang , Chunheng Zhou , Xuan Wang","doi":"10.1016/j.istruc.2025.108755","DOIUrl":"10.1016/j.istruc.2025.108755","url":null,"abstract":"<div><div>Effective rebar–concrete interaction necessitates a robust bond interface, yet accurately simulating interfacial bond failure remains challenging. To precisely capture rib–concrete interaction, refined finite element (FE) models were developed using parametric and reverse modeling approaches. These models enabled successful simulation of the nonlinear bond failure process. The influence of concrete strength, rebar diameter, and rib configuration on interfacial bond performance was investigated at the mesoscale level. Pullout tests validated the proposed approaches. Results demonstrate a linear correlation between concrete strength and bond strength while increasing rebar diameter leads to a gradual decrease in bond strength and a shift in failure mode. Rib configuration significantly influences interfacial bond performance. The reverse modeling approach, by accurately capturing the real rebar’s geometric profile, yielded more accurate numerical results than the parametric approach, exhibiting better agreement with the experimental observations.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108755"},"PeriodicalIF":3.9,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734665","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

Design and verification of a magnetorheological elastomer - based vibration isolator with adjustable stiffness 设计并验证基于磁流变弹性体的刚度可调隔振器

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-30 DOI: 10.1016/j.istruc.2025.108762

Changheng Yu , Jianfei Yao , Shiwen Jiao , Dacheng Li

{"title":"Design and verification of a magnetorheological elastomer - based vibration isolator with adjustable stiffness","authors":"Changheng Yu , Jianfei Yao , Shiwen Jiao , Dacheng Li","doi":"10.1016/j.istruc.2025.108762","DOIUrl":"10.1016/j.istruc.2025.108762","url":null,"abstract":"<div><div>A magnetorheological elastomer (MRE) - based vibration isolator with adjustable stiffness is designed in this work. The core component of the isolator is MRE, whose magneto-induced modulus is altered by controlling the voltage of the coils, thereby adjusting the magnetic field surrounding the MRE to achieve stiffness variation. A new arrangement scheme of MRE utilizing a sliding helical drive is introduced, which converts linear motion into rotational movement, inducing both compression and torsional deformation in the MRE. The magnetic circuit, along with the generation and distribution of magnetic field within the device, is thoroughly analyzed. The structural form and parameters of the device are optimized. A prototype of the MRE-based isolator was developed, and a test rig was built to verify its performance. The results demonstrate that the MRE-based isolator exhibits frequency shift characteristics and achieves significant vibration reduction within specific frequency bands. The vibration isolator shows promising potential for vibration reduction in equipment used in transportation, industrial production, aerospace, and other fields.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108762"},"PeriodicalIF":3.9,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734666","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 investigation and numerical simulation of steel frame substructure equipped with self-centering energy dissipative braces

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-29 DOI: 10.1016/j.istruc.2025.108770

Tong Liu, Lihua Zhu, Mingming Zhang, Yao-Rong Dong, Yuanyuan Lyu

{"title":"Experimental investigation and numerical simulation of steel frame substructure equipped with self-centering energy dissipative braces","authors":"Tong Liu, Lihua Zhu, Mingming Zhang, Yao-Rong Dong, Yuanyuan Lyu","doi":"10.1016/j.istruc.2025.108770","DOIUrl":"10.1016/j.istruc.2025.108770","url":null,"abstract":"<div><div>To verify the applicability of the developed self-centering energy dissipation (SCED) brace in the hinged steel frame structure system, two 1/2 scaled two-story hinged steel frame substructure equipped with SCED brace (SF-SCB) was designed, fabricated, and tested to study the seismic performance of a hinged SF-SCB structure. In particular, almost all seismic design of SF-SCB adopt pin connection, including column base foundations. The seismic performance of hinged SF-SCB such as the yield load, energy dissipative, and self-centering ability was studied by quasi-static test. The test results show that even if the peak story drift ratio exceeds 3 %, the hinged SF-SCB has almost no damage and destruction due to its excellent self-centering ability and pin connection design. The component gap (reserved connection gap between pin and ear plate) is the primary reason for the small stiffness in the initial stage of hinged SF-SCB loading and the large residual displacement. The performance of the SF-SCB substructure exhibits almost no degradation after multiple horizontal loads, and no damage or failure occurs in any component. Which shown that SF-SCB is completely recoverable after an earthquake and has the ability to withstand multiple earthquakes, and its components can undergo multiple repeated disassembly and recycling cycles. Furthermore, a three-dimensional full-scale finite element refinement model was established for simulation analysis. The results show that the experimental results are in good agreement with the numerical simulation results, and the established simulation model can effectively reflect the hysteretic behavior and actual stress characteristics of the SF-SCB substructure.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108770"},"PeriodicalIF":3.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734663","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 new numerical model for analysing timber-concrete composite beams under fire conditions

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-29 DOI: 10.1016/j.istruc.2025.108575

R. Pečenko , T. Hozjan , S. Huč

引用次数: 0

Axial compressive behavior of circular steel-reinforced concrete-filled stainless steel tubular stub columns

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-29 DOI: 10.1016/j.istruc.2025.108751

Hongbo Liu , Kaibing Wang , Jing Sun , Qiyun Qiao , Lubin Wei , Xiaoxu Ye , Aoqi Yang , Wanlin Cao

{"title":"Axial compressive behavior of circular steel-reinforced concrete-filled stainless steel tubular stub columns","authors":"Hongbo Liu , Kaibing Wang , Jing Sun , Qiyun Qiao , Lubin Wei , Xiaoxu Ye , Aoqi Yang , Wanlin Cao","doi":"10.1016/j.istruc.2025.108751","DOIUrl":"10.1016/j.istruc.2025.108751","url":null,"abstract":"<div><div>In this paper, the axial compressive behavior of circular steel-reinforced concrete-filled stainless steel tubular (SRCFSST) stub columns was experimentally investigated and modeled by finite element (FE) simulations. Six specimens were developed and tested, with concrete strength and steel section ratio as the test variables. The resulting failure pattern, load-displacement curve, bearing capacity, ductility, the residual bearing capacity index, rigidity, strength-to-weight-ratio, and strain characteristics were analyzed. FE models were established to validate the experimental results. More extended FE simulations were carried out considering steel tube strength, steel tube wall thickness, and concrete strength as variables. The results show that the circular SRCFSST stub column has high bearing capacity and residual bearing capacity. The inserted steel section blocks the extension of concrete diagonal cracks. The resulting load-displacement curve showed elastic, elastic-plastic, plastic, and maintenance stages. Inserting the steel section improved the specimen ductility. The residual bearing capacity index (<em>Ld</em>) indicates that using inserted steel sections and lower-strength concrete can effectively enhance the residual bearing capacity. The numerical simulation and experimental results are in good agreement. Finally, theoretical analysis based on EC4, GB50936–2014, and models presented in the literature was conducted, and a simplified equation to evaluate the axial ultimate compressive strength of circular SRCFSST stub columns was proposed, which exhibited good agreement with experimental and numerical findings.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108751"},"PeriodicalIF":3.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725191","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

Impact response of hybrid FRP-concrete-steel double-skin tubular bridge piers with fixed-simply supported boundary conditions: Experimental study and FE analysis

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-29 DOI: 10.1016/j.istruc.2025.108730

Shuhong Lin , Sumei Zhang , Bing Zhang , Ran Deng , Yutao Peng

{"title":"Impact response of hybrid FRP-concrete-steel double-skin tubular bridge piers with fixed-simply supported boundary conditions: Experimental study and FE analysis","authors":"Shuhong Lin , Sumei Zhang , Bing Zhang , Ran Deng , Yutao Peng","doi":"10.1016/j.istruc.2025.108730","DOIUrl":"10.1016/j.istruc.2025.108730","url":null,"abstract":"<div><div>Hybrid FRP-concrete-steel double-skin tubular columns (DSTCs) have emerged as an innovative type of hollow-section bridge pier, particularly suitable for use in corrosive environments, and have recently been applied in practical bridge engineering projects. Vehicle collisions are a leading cause of bridge pier failures, making impact resistance a critical performance factor for ensuring the structural safety of bridges. However, the existing studies about the impact performance of DSTCs have significant limitations. For instance, the void ratio <em>φ</em> (0.42–0.47) and the column diameter <em>D</em> (114–168 mm) studied are considerably smaller than those typically found in practical bridge structures. To address this gap, this study investigated six DSTCs with large void ratios (<em>φ</em> = 0.73 or 0.82) and section diameters (<em>D</em> = 300 mm), where the lower end was fixed and the upper end was simply supported. These columns were subjected to impact loading using a horizontal vehicle impact system to examine the influences of impact velocity, number of impacts, FRP thickness, steel thickness, and DSTC void ratio. The experimental results demonstrated the following: (1) due to the constraint at the upper end, DSTC specimens exhibited small overall lateral displacement but more pronounced localized concave deformation after the impact; (2) increasing the void ratio resulted in reduced impact force, decreased global lateral displacement, and increased localized concave deformation; (3) contact stiffness and flexural stiffness increased with steel thickness, leading to higher impact force, decreased global lateral displacement, and smaller local dent deformation. Subsequently, utilizing LS-DYNA, an FE model was used to simulate the dynamic responses of DSTC specimens. A parameter analysis was performed to study the influences of impactor mass, steel yield strength, impactor height, and axial compression ratio.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108730"},"PeriodicalIF":3.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725195","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

Dynamic behavior of wind turbine with viscous inertial mass system under wind and seismic excitations

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-29 DOI: 10.1016/j.istruc.2025.108746

Yijie Cai , Xia Li , Tianyang Zhang , Weizhi Xu , Shuguang Wang , Dongsheng Du

{"title":"Dynamic behavior of wind turbine with viscous inertial mass system under wind and seismic excitations","authors":"Yijie Cai , Xia Li , Tianyang Zhang , Weizhi Xu , Shuguang Wang , Dongsheng Du","doi":"10.1016/j.istruc.2025.108746","DOIUrl":"10.1016/j.istruc.2025.108746","url":null,"abstract":"<div><div>In recent years, tuned mass dampers (TMDs) have been used for the vibration control of wind turbines. To improve the vibration control effect of a TMD, novel vibration control systems have been developed by adding an inertial element. These novel vibration control systems can be classified into untuned and tuned viscous inertial mass systems (VIMS and TVIMS, respectively). In this study, the optimal parameters of each system in a single-degree-of-freedom system were determined by performing a frequency domain analysis. Numerical models of a 2.2 MW wind turbine with a TMD, VIMS and TVIMS were developed. The numerical models included theoretical models of a TMD, VIMS, and TVIMS, and used their optimal design parameters with a mass ratio of 2 %. Each model was validated by comparing its frequency information with that of an actual structure. Dynamic analysis of each structure was performed to obtain the structural responses under wind, seismic, and wind-seismic coupling loads. The advantages of the different vibration control systems were evaluated by comparing the responses of the vertices and the space required for each system. The VIMS can reduce the spring elongation by an average of 33.21 %, with a maximum reduction of 39.42 %. However, the VIMS was not as effective in controlling the structural displacement response as the TMD, with an average displacement response of only 4.99 %. The TVIMS improved the displacement response control effect by at least 21.83 %; however, the spring elongation was needed to be increased by at least 26.82 %. Its excellent control effect is attributed to large deformation of the spring element.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108746"},"PeriodicalIF":3.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725190","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

Analysis on the impact resistance of steel fiber reinforced recycled aggregate concrete

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-28 DOI: 10.1016/j.istruc.2025.108599

Xianggang Zhang , Yulin Li , Yuhui Fan , Gaoqiang Zhou , Yajun Huang , Pu Xu , Yahong Ding

{"title":"Analysis on the impact resistance of steel fiber reinforced recycled aggregate concrete","authors":"Xianggang Zhang , Yulin Li , Yuhui Fan , Gaoqiang Zhou , Yajun Huang , Pu Xu , Yahong Ding","doi":"10.1016/j.istruc.2025.108599","DOIUrl":"10.1016/j.istruc.2025.108599","url":null,"abstract":"<div><div>The use of recycled aggregates and the addition of steel fibers make steel fiber reinforced recycled aggregate concrete (SFRRAC) an environment-friendly and high-performance building material. To investigate the dynamic mechanical properties of SFRRAC, this study aims to reveal the failure mechanism under impact loads and analyze the internal forces acting on the steel fiber within the recycled aggregate concrete (RAC). The impact performances of SFRRAC under varying strain rates was simulated using the proposed finite element model. The SFRRAC with 1.5 % steel fiber content and 50 % replacement ratio of recycled coarse aggregate was analyzed under the impact pressure of 0.3 MPa, 0.4 MPa, 0.5 MPa and 0.6 MPa, respectively. The research shows that the matrix element of the RAC is mainly subjected to compressive strain in the stress-time curve.The steel fiber is mainly compressive at the initial stage of loading, gradually changing into partially tension and partially compression, and tensile at the later stage. The steel fiber parallel to the impact direction experiences primarily compressive stress, while the steel fiber perpendicular to the impact direction is subjected to mainly tensile stress. Initially, the inclined steel fiber experiences primarily compressive stress, transitioning to mainly tensile stress in the later stage. The study provides basic support for dynamic design of such materials in practical engineering.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108599"},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725188","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 behavior and resistant systems of girder bridges with tall piers: A comprehensive and state-of-the-art review

IF 3.9 2区工程技术

Structures Pub Date : 2025-03-28 DOI: 10.1016/j.istruc.2025.108753

Junfeng Jia , Yang Liu , Xiuli Du , Cancan Yang

{"title":"Seismic behavior and resistant systems of girder bridges with tall piers: A comprehensive and state-of-the-art review","authors":"Junfeng Jia , Yang Liu , Xiuli Du , Cancan Yang","doi":"10.1016/j.istruc.2025.108753","DOIUrl":"10.1016/j.istruc.2025.108753","url":null,"abstract":"<div><div>This study provides a comprehensive review of the state-of-the-art in seismic design and resilience for girder bridges with tall piers, a critical infrastructure component in mountainous and canyon regions. With the increasing complexity of topographical challenges, especially in southwest China, tall piers exceeding 40 m have become indispensable in navigating these spatial constraints. However, their significant mass distribution and high height-to-width ratios introduce complex seismic behavior, making them vulnerable to earthquake-induced damages. This study synthesizes various definitions of tall piers across seismic design codes and explores the unique seismic behavior characteristics that classify these structures as irregular. We critically evaluate the efficacy of conventional seismic ductility and isolation systems, underscored by case studies of observed damages in major earthquakes. Innovations in seismic-resistant systems, including the adoption of Concrete Filled Steel Tube (CFST) tall piers and Rocking Self-centering (RSC) systems, are highlighted for their potential to enhance the durability and recovery capabilities of girder bridges post-earthquake. Despite advancements, challenges in post-earthquake rehabilitation, theoretical frameworks, and cost-effectiveness persist, necessitating further research. This study concludes by identifying future research directions aimed at extending innovative RSC technology to girder bridges with tall piers, improving seismic performance assessments, and refining the quantification of higher-mode effects. Through a systematic review, this study aims to pave the way for further innovation and application of advanced seismic-resistant technologies in the construction of girder bridges with tall piers, enhancing their resilience against seismic threats.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"75 ","pages":"Article 108753"},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725189","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