Structures最新文献

{"title":"Cohesive zone model-integrated hybrid numerical simulation strategy for RC/PC beam-column joints under reversed cyclic loadings","authors":"Dianyou Yu ,&nbsp;Zheng He","doi":"10.1016/j.istruc.2025.109772","DOIUrl":"10.1016/j.istruc.2025.109772","url":null,"abstract":"<div><div>Beam-column joints represent one of the most prevalent connection types in modern reinforced concrete structures. Their seismic performance and fracture behavior under strong earthquakes critically govern structural safety, while variations in their detailing configurations lead to significant differences in mechanical response and failure modes. Simultaneously accounting for the hysteretic performance and apparent fracture behavior of precast concrete (PC)/cast-in-situ reinforced concrete (RC) joints in simulation methods has always been challenging. This study proposes an innovative simulation strategy by combines cohesive zone model (CZM) with three-dimensional (3D) model, referred to as the dual-layer model. The 3D model simulates the hysteresis loops, deformation, and energy dissipation of PC/RC joints, while CZM layer captures their fracture behavior at local level. The boundaries are individually tied to achieve time-sequence synchronization deformation. To address the ambiguity in determination the compressive stiffness recovery factor (<em>w</em>_c) in the concrete damaged plasticity (CDP) model, a calculation method for the stiffness recovery path is developed by integrating the CDP model with the focus points model. Furthermore, based on the principle of area equivalence and the concept of multilevel damage zoning, a calibration method is established to determine <em>w</em>_c, and the interval separation point of damage which is related to connection parameters is introduced. Subsequently, verification and comparative analysis are conducted on three PC/RC beam-column joints with varying connection stiffness and configurations. Verification results between simulation and experiment indicate that nearly all backbone points errors below 15 %. Acceptable consistency is demonstrated in stiffness, load-bearing capacity trends, and energy dissipation before and after cracking. The visual similarity of the failure patterns exceeds 60 % across all specimens. The modeling adequacy of the CZM layer and the <em>w</em>_c configuration is confirmed through comparative analysis.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109772"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696631","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":"Research on load-bearing mechanism and estimation of steel tube-corrugated steel plate composite walls under axial compression","authors":"Xin-Jie Li ,&nbsp;Jin-hui Luo ,&nbsp;Guo-Qiang Li ,&nbsp;Si-Xian Zhang ,&nbsp;Guo-Biao Lou","doi":"10.1016/j.istruc.2025.109745","DOIUrl":"10.1016/j.istruc.2025.109745","url":null,"abstract":"<div><div>The Steel tube-corrugated steel plate composite wall (STCPCW) is a novel structural component developed to resist shear forces induced by horizontal loads in high-rise buildings, while also requiring the capacity to support gravity loads that induce compression. To investigate its performance under axial compression, both experimental and numerical studies were conducted. Two STCPCW specimens with different widths of corrugated cell (<em>b</em>_w) were tested, both exhibiting cross-sectional failure. As the <em>b</em>_w increased from 500 mm to 1000 mm, the ductility index decreased by 45.7 %. A finite element model was developed to simulate the load-bearing mechanism of STCPCW under axial compression and was validated using the test results. Further numerical analysis revealed that the infilled concrete wall exhibited distinct behavior in response to the varying confinement provided by corrugated steel plates (CSPs). Once the equivalent width-to-thickness ratio of the CSPs reached 60, the confinement effect of the CSPs became minimal. Consequently, the axial compressive performance of the infilled concrete wall was evaluated under two scenarios. When the confinement is minimal, the load-bearing capacity of the infilled concrete wall is predominantly influenced by the configuration of the concrete wall and the strength of the concrete; when the confinement is effective, the confinement effect of the CSPs and steel tubes becomes the primary factor. Additionally, the reduction caused by insufficient ductility of the infilled concrete wall when calculating the load-bearing capacity of STCPCWs was assessed using a discount factor, <em>β</em>. Finally, a practical estimation of the load-bearing capacity of the STCPCWs under axial compression was proposed.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109745"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696542","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":"Shear and flexural performance of an RPC wet joint in a prefabricated reinforced concrete structure","authors":"Wenping Du ,&nbsp;Guanjun Zhang ,&nbsp;Fawang Zhu ,&nbsp;Peng Hou ,&nbsp;Caiqian Yang ,&nbsp;Hans De Backer ,&nbsp;Baoqing Tian ,&nbsp;Yaqiang Yang ,&nbsp;Yong Pan ,&nbsp;Houfu Zhao","doi":"10.1016/j.istruc.2025.109711","DOIUrl":"10.1016/j.istruc.2025.109711","url":null,"abstract":"<div><div>The shear and flexural performance of prefabricated reinforced concrete (RC) beams with reactive powder concrete (RPC)-based wet joints were experimentally investigated. The influences of parameters such as RPC wet joint type (monolithic, diagonal joint, double-keyed joint, or single-keyed joints) and joint slope were comparatively explored. Five shear specimens and eight flexural specimens were manufactured and tested. The crack pattern, load-deflection relationship, load–strain relationships between the load and strain, shear strength, flexural capacity, and deflection were investigated. The direct shear test results indicated that a diagonal joint without shear steel rebar was optimal joint type. The RPC wet joints with shear steel rebar could improved the interface bonding force ductility. A shear strength calculation model was developed to evaluate the shear performance of wet joints, Moreover, the effect of joint type was considered. The four-point bending test results revealed that the cracking resistance levels of the diagonal joint and single-keyed joints of the prefabricated RC beams were greater than that of the castellated joint. The optimal joint slope between diagonal strut and vertical direction was 45°. Two improved analytical models were developed to estimate the flexural capacity and deflection levels of prefabricated RC beams with different joint types and slopes. The proposed analytical models adequately agreed with the test data.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109711"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696630","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 performance and expected economic losses of dual MRF RC buildings with buckling-restrained braces using FEMA P-58","authors":"Alfredo Félix-Soto ,&nbsp;Alfredo Reyes-Salazar ,&nbsp;Marco A. Santos-Santiago ,&nbsp;Robespierre Chávez ,&nbsp;Magnolia Soto-Félix ,&nbsp;Federico Valenzuela-Beltrán","doi":"10.1016/j.istruc.2025.109752","DOIUrl":"10.1016/j.istruc.2025.109752","url":null,"abstract":"<div><div>This research aims to evaluate the seismic performance of reinforced concrete buildings located on different types of soil in Mexico City, in terms of expected economic losses. The models are based on moment-resisting frames and are alternatively equipped with buckling-restrained braces. Nonlinear dynamic analyses are performed for different levels of seismic intensity with the objective of obtaining structural response parameters such as interstory drifts and floor accelerations. Finally, the seismic performance of the buildings is evaluated using the second generation of performance-based seismic design methodologies, which, through a probabilistic method and using parameters such as structural response, building characteristics, and seismic hazard, allows for obtaining results in terms of expected annual losses (EAL) and performing a cost-benefit analysis. This analysis demonstrated the benefits of using buckling-restrained braces, as they presented lower EAL and life-cycle costs compared to traditional models, mainly in the models located on soft soil, where the model equipped with buckling-restrained braces proved to be 20 % more cost-effective, while in contrast, the stiff soil condition was inefficient, resulting in a 12 % higher cost.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109752"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696541","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":"Study on the distribution characteristics and the regional classification of blast waves on shield tunnel under internal blast","authors":"Liufeng Su ,&nbsp;Yajun Xu ,&nbsp;Qixiang Yan ,&nbsp;Haojia Zhong ,&nbsp;Ping Geng ,&nbsp;Yongjun Deng","doi":"10.1016/j.istruc.2025.109784","DOIUrl":"10.1016/j.istruc.2025.109784","url":null,"abstract":"<div><div>The increasing adoption of the shield method in transportation and municipal engineering has heightened concerns regarding the blast resistance performance of shield tunnels. To investigate the propagation characteristics and attenuation behaviors of blast waves induced by internal explosions within shield tunnels, scaled model experiment was designed and conducted in this study. The blast pressure time-history curves on the tunnel walls were recorded for different explosive charges detonated at both center and eccentric positions. Subsequently, numerical simulation was utilized to examine the effects of explosive equivalent, tunnel diameter, detonation positions, and charge geometry on blast wave distribution. Furthermore, wavelet packet energy analysis was applied to the pressure curves to refine the regional classification of blast loading. The finding of this study can provide valuable insights for blast-resistant design and explosion mitigation strategies in shield tunnel engineering.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109784"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696543","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":"Research on bond-slip behavior of I-shaped steel and reactive powder concrete","authors":"Chang Liu ,&nbsp;Tiangui Xu ,&nbsp;Yangting Chen ,&nbsp;Yuzhuo Wang ,&nbsp;Yuming Zhang ,&nbsp;Jinsheng Du","doi":"10.1016/j.istruc.2025.109785","DOIUrl":"10.1016/j.istruc.2025.109785","url":null,"abstract":"<div><div>This paper presents the bond-slip behavior of steel reinforced reactive powder concrete (SRRPC) structures under different influencing conditions. Push-out tests were conducted on 23 specimens by considering the effects of parameters such as cover thickness, anchor length of steel, stirrup spacing, steel content, and isolation mode. The test results indicated that: (1) The concrete cover thickness is the most significant influencing parameter, followed by anchorage length and steel content, while the effect of stirrup spacing is relatively small. The ultimate and residual bond stress increased by 84.06 % and 129.35 %, respectively, as the cover thickness increased from 40 to 100 mm. (2) Formulas for calculating stress and slippage were obtained by analyzing the test data under different parameters. (3) The cover thickness had a great influence on the friction proportion, while the other parameters (anchorage length, stirrup spacing and steel content) had a weak effect. (4) As the increase of cover thickness and steel content, energy dissipation increases, while as the stirrup spacing increases, energy dissipation decreases. (5) A constitutive model was developed to reflect the interfacial stress-slip situation, which provided significant insights into the mechanical performance analysis of SRRPC structures.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109785"},"PeriodicalIF":3.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696540","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":"Implementing a novel procedure of ACI 544.2R drop-weight impact test to measure the residual compressive strength after impact of multi-layered fiber-reinforced concrete with different patterns","authors":"Samaa A. Goda ,&nbsp;Ashraf H.H.A. Elsafoury ,&nbsp;Hossam El-Din M. Sallam","doi":"10.1016/j.istruc.2025.109755","DOIUrl":"10.1016/j.istruc.2025.109755","url":null,"abstract":"<div><div>The main drawbacks of ACI 544.2 R repeated impact test are the time and effort consumed. This paper proposes the compressive after-impact (CAI) test concept to eliminate such disadvantages, i.e., to markedly reduce the number of blows, which can reach thousands in certain cases. The test procedure was to measure the CAI of the disc specimens before and after being subjected to a few blows by the same setup of the ACI 544.2 R test, i.e., the load is transmitted to the disc specimen through the metallic ball resting on it. Another notable achievement in the current work is the investigation of the CAI of multi-layered fiber-reinforced concretes (FRCs) with different patterns, i.e., layers, sequences, and types of fibers—to obtain optimal impact resistance for FRCs. Three different types of concrete were used: plain concrete (PC), polypropylene (PP) FRC, and steel (ST) FRC. Single-, two-, and three-layered FRCs were made from these concretes with different sequences/patterns for facing the impactor. The ultimate static compressive loads measured by the proposed and standard tests showed a logical relationship between them. ST FRC showed the best kind of concrete for resisting such contact stress. The Weibull distribution was used to analyze the scattered test results. The statistical results showed good consistency of the present results, as the coefficient of variation was less than 0.25. For single-layered specimens, the ST specimen showed the highest Residual Strength Indicator (RSI), at 91 %, followed by the PP specimen, at 80 %, and finally, the PC specimen at 65 %. CAI of two-layered specimens with an outer ST layer (subjected to the impactor) showed higher impact capacity (RSI = 88 %) than other two-layered specimen patterns. Furthermore, a three-layered specimen with two layers of ST FRC and an inner PC layer showed the highest three-layered patterns resist the impact load (RSI = 90 % after two blows). Therefore, the thickness of the shielded layer is the main parameter controlling the improvement of a structural element's impact resistance. Finally, the proposed ACI 544.2 R test procedure can be adopted to measure the impact resistance of multi-layer FRCs or other FRCs, consuming significantly less time and effort.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109755"},"PeriodicalIF":3.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686686","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 flexural cracks in a concrete girder railway bridge using displacement influence lines","authors":"Samim Mustafa ,&nbsp;Pawan Singh ,&nbsp;Abhishek Kumar Srivastava","doi":"10.1016/j.istruc.2025.109758","DOIUrl":"10.1016/j.istruc.2025.109758","url":null,"abstract":"<div><div>This paper introduces a methodology for detecting flexural cracks in concrete railway bridges based on the displacement influence line (DIL) and a probabilistic damage index formulated using a Bayesian method. Bridge displacement responses were collected under moving train loads and used to derive the most probable DIL, along with associated uncertainties, without requiring prior structural models. A damage indicator was defined based on variations in the DIL coefficients, and damage probability is quantified using Gaussian approximations. The methodology was validated using a finite element model (FE-model) of an existing concrete railway bridge, incorporating rail-structure interactions. To assess the impact of flexural cracks on the overall bridge response, three types of flexural cracks at different locations with varying depths and three measurement locations were considered. The results demonstrated that the DIL-based approach is more sensitive to local flexural cracks than traditional modal parameters. Furthermore, the method allows for potential damage detection using displacement data from a single sensor, unlike modal parameters which necessitate an array of sensors. The proposed framework offers a probabilistic interpretation of damage, enabling infrastructure managers to assess the severity and prioritize inspections. Recommendations for sensor deployment and practical considerations for field applications are discussed to support implementation in real-world bridge monitoring.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109758"},"PeriodicalIF":3.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686684","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":"Research and application of non-destructive testing technology for timber structures: A review","authors":"Lin Chen ,&nbsp;Qingzhao Kong ,&nbsp;Qingsong Xiong ,&nbsp;Haibei Xiong","doi":"10.1016/j.istruc.2025.109790","DOIUrl":"10.1016/j.istruc.2025.109790","url":null,"abstract":"<div><div>Non-destructive testing (NDT) technologies have emerged as vital tools for assessing and ensuring the integrity, durability, and safety of timber structures while minimizing potential damage to the material itself. Great endeavor has been dedicated to developing diverse NDT methods for structural health monitoring of timber structures. However, inspired by rapid technology upgrading and innovative introduction of multi-discipline techniques, NDT-based approaches on timber health monitoring have demonstrated a trend of wider specificity, higher versatility, and enhanced complexity with nontrivial significance awareness and stringent applicability requirement. This work conducts a comprehensive literature review on research and application of NDT technology on timber structures, aiming at synthesizing existing research and knowledge and thus contributing to a deeper understanding both theoretically and practically.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109790"},"PeriodicalIF":3.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686680","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":"Exploring the shear behavior of masonry triplets via digital image correlation, damage quantification and Mohr-Coulomb criterion identification","authors":"Louis Collin ,&nbsp;Fabrice Gatuingt ,&nbsp;Cédric Giry ,&nbsp;François Hild","doi":"10.1016/j.istruc.2025.109696","DOIUrl":"10.1016/j.istruc.2025.109696","url":null,"abstract":"<div><div>Shear properties are essential for evaluating the strength of masonry infill walls. Traditionally, shear strength parameters are experimentally determined through triplet shear tests. While extensive research exists on these tests, few studies have combined full-field measurement techniques such as Digital Image Correlation (DIC) with mesoscopic damage analysis and shear strength quantification. Leveraging the detailed displacement fields provided by DIC and force measurements, the study seeks to enhance the characterization of the Mohr-Coulomb criterion in mortar joints. An experimental campaign on eight specimens yields valuable insights through force-displacement curves and DIC post-processing in a monoview configuration. This analysis proposes a novel method to achieve a more precise estimation of triplet shear strength.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"80 ","pages":"Article 109696"},"PeriodicalIF":3.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686679","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}