Case Studies in Construction Materials最新文献_第2页

Chloride ingress in de-icing salt-exposed bridge: Numerical modeling and field investigations 除冰盐暴露桥中氯化物的进入：数值模拟和现场调查

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-07-01 DOI: 10.1016/j.cscm.2025.e05003

Samaneh Khani , David Conciatori , Luc Chouinard , Benoit Fournier , Mohammad Khaleghi Esfahani , Abdoul S. Bah , Xuande Chen

{"title":"Chloride ingress in de-icing salt-exposed bridge: Numerical modeling and field investigations","authors":"Samaneh Khani , David Conciatori , Luc Chouinard , Benoit Fournier , Mohammad Khaleghi Esfahani , Abdoul S. Bah , Xuande Chen","doi":"10.1016/j.cscm.2025.e05003","DOIUrl":"10.1016/j.cscm.2025.e05003","url":null,"abstract":"<div><div>This research focuses on assessing the durability of various components of an onshore section of the Original Champlain Bridge in Montreal, specifically in relation to chloride ingress from de-icing salting operations. Chloride penetration in both the original and repaired concrete are both numerically modelled and measured. The transport characteristics of repaired and original parts of the concrete were determined using non-destructive air permeability tests and used in the TransChlor® to predict chloride ingress into the air-exposed repaired sections and underlying unrepaired sections over the service life of the bridge. By selecting appropriate boundary conditions, and historical climatic data, the predicted chloride profiles are shown to be a close match to core sample data from both the repaired and unrepaired sections of structural elements. This research proposes a blind a-priori prediction method for analyzing and predicting chloride ingress in ageing concrete structures as opposed to a-posteriori predictions made by matching chloride profiles obtained from cores, which is a common practice in the literature. Furthermore, it was clearly demonstrated that cathodic protection is effective in preventing chloride ingress into concrete. However, the ability to predict chloride ingress in the presence of cathodic protection was identified as a gap in current chloride ingress models such as TransChlor®, and an objective for future research.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e05003"},"PeriodicalIF":6.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563914","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

Grouted dense skeleton concrete: Development and performance influence mechanism 灌浆密骨架混凝土的发展及其性能影响机理

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-07-01 DOI: 10.1016/j.cscm.2025.e04999

J.J. Chen , P.L. Ng , D.H. Duan , G.X. Guan , J. Wang

{"title":"Grouted dense skeleton concrete: Development and performance influence mechanism","authors":"J.J. Chen , P.L. Ng , D.H. Duan , G.X. Guan , J. Wang","doi":"10.1016/j.cscm.2025.e04999","DOIUrl":"10.1016/j.cscm.2025.e04999","url":null,"abstract":"<div><div>Grouted dense skeleton concrete is formed by grouting of cementitious paste to the pre-placed aggregate skeleton. This type of concrete is desirable for site conditions with restricted access of conventional concrete delivery and placement, however, the quality control is often challenging due to the difficulty in controlling the groutability. This study examined the desirable aggregate mixes by dividing the aggregate of 5–25 mm size range into four size fractions and blending them at various proportions to form the pre-placed aggregate skeleton. Grouted dense skeleton concrete mixes were produced with different combinations of aggregate size fractions and w/c (water-to-cement) ratios. The groutability, compressive and flexural strength, and durability in terms of electric flux and carbonation of the grouted dense skeleton concrete were measured. Quantitative analysis revealed that the groutability was governed by the paste flowability and the aggregate skeleton voids ratio, the compressive strength and electric flux were mainly governed by the concrete permeable voids ratio and aggregate skeleton voids ratio, and the flexural strength and carbonation depth were solely governed by the concrete permeable voids ratio. To produce grouted dense skeleton concrete with satisfactory fresh and hardened performance, aggregate skeleton with wide particle size range and paste with high flowability are advisable.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04999"},"PeriodicalIF":6.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563816","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

Insights into the corrosion resistance of Cr-Mo alloy reinforcing steel in simulated pore solution and real seawater sea-sand concrete: A preliminary study Cr-Mo合金钢筋在模拟孔隙溶液和真实海水海砂混凝土中的耐蚀性初步研究

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-07-01 DOI: 10.1016/j.cscm.2025.e05002

Zhongyi Xin , Le Guo , Fengjuan Wang , Qi Luo , Liguo Wang , Huande Chen , Zhiyong Liu , Jinyang Jiang

{"title":"Insights into the corrosion resistance of Cr-Mo alloy reinforcing steel in simulated pore solution and real seawater sea-sand concrete: A preliminary study","authors":"Zhongyi Xin , Le Guo , Fengjuan Wang , Qi Luo , Liguo Wang , Huande Chen , Zhiyong Liu , Jinyang Jiang","doi":"10.1016/j.cscm.2025.e05002","DOIUrl":"10.1016/j.cscm.2025.e05002","url":null,"abstract":"<div><div>Corrosion of steel bars embedded in reinforced concrete structures considerably reduces the service life and even causes early failure of the structure. The purpose of this study is to investigate the corrosion resistance mechanism of Cr-Mo alloy reinforcing steel (CR) in seawater sea-sand concrete (SWSSC) and the possibility of its application in SWSSC. Three types of steel were carried out in real SWSSC and seawater sea-sand concrete pore solution (SWSSCPS). Compared with low-carbon steel (LC) and stain-less steel (SS), electrochemical measurements, AFM, XPS and SEM-EDS were applied to study the composition, structure and morphology characterizations of passive film. Electrochemical analysis revealed that in the initial stage of immersion, the corrosion resistance of CR demonstrated a rapid increase in open-circuit potential and electrochemical impedance spectroscopy (EIS), suggesting an active-passive transition process. The passive film on CR was found to have a distinct elemental distribution, with chromium and iron playing crucial roles in enhancing its stability. Based on the interactions of steel corrosion products and passive film at the steel-concrete and steel-solution interface, the possible formation of passive film and the resistance mechanism of CR were proposed. This study substantially augments the comprehension of the corrosion resistance characteristics of CR within SWSSC. Moreover, it proffers invaluable perspectives for the optimization of its utilization, which is conducive to fostering the advancement of reinforced concrete structures in marine and coastal zones.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e05002"},"PeriodicalIF":6.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523470","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 assessment on mechanical performance of precast concrete sandwich panels manufactured with mixed recycled aggregate 混合再生骨料预制混凝土夹芯板力学性能试验评价

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-30 DOI: 10.1016/j.cscm.2025.e05001

Jian Ma , Pengpeng Yan , Xu Liu

{"title":"Experimental assessment on mechanical performance of precast concrete sandwich panels manufactured with mixed recycled aggregate","authors":"Jian Ma , Pengpeng Yan , Xu Liu","doi":"10.1016/j.cscm.2025.e05001","DOIUrl":"10.1016/j.cscm.2025.e05001","url":null,"abstract":"<div><div>Mixed recycled coarse aggregate (MRA), derived from construction and demolition waste of masonry-concrete composite frame structures, primarily consists of recycled concrete aggregate (RCA) and recycled brick aggregate (RBA). Due to the high porosity of MRA, its application to precast concrete sandwich wall panels (PCSPs) is beneficial for improving their thermal performance. However, the influence of MRA on the mechanical properties of such sandwich panels remains inadequately characterized. This study presents experimental findings on the axial and flexural behavior of PCSPs incorporating MRA (MRA-PCSPs). Results show that with a 50 % MRA replacement rate, the axial and flexural bearing capacities of the panels decreased by 15.7 % and 6.7 %, respectively. Compared with bending performance, MRA has a more significant adverse effect on axial compression performance. When the RBA content in MRA increased from 10 % to 30 %, the cracking loads under axial compression and bending tests decreased by 24.7 % and 15.1 %, respectively, but the ultimate load was not adversely affected. While the inclusion of MRA did not compromise the composite action of PCSPs, using a thicker insulation board led to reductions in both the load-bearing capacity and composite performance. The addition of edge frames significantly enhanced the mechanical performance of MRA-PCSPs, increasing their axial and flexural bearing capacities by 23.6 % and 204.5 %, respectively. The composite action of the wall panels is significantly enhanced after adding edge frames, which is basically equivalent to solid wall panels.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e05001"},"PeriodicalIF":6.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519239","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 multi-visual measurement method for ultimate tensile elongation of steel strand based on spatial characteristics 基于空间特性的钢绞线极限拉伸伸长多视觉测量方法

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-30 DOI: 10.1016/j.cscm.2025.e05000

Xiong Peng , Pengtao Wang , Bingxu Duan , Xingu Zhong , Guihua Wang , Chao Zhao

{"title":"A multi-visual measurement method for ultimate tensile elongation of steel strand based on spatial characteristics","authors":"Xiong Peng , Pengtao Wang , Bingxu Duan , Xingu Zhong , Guihua Wang , Chao Zhao","doi":"10.1016/j.cscm.2025.e05000","DOIUrl":"10.1016/j.cscm.2025.e05000","url":null,"abstract":"<div><div>Prestressed steel strands exhibit remarkable strength and relaxation properties, making them essential in engineering projects such as bridges and high-rise buildings. Traditional contact-based measurements using strain gauges typically require adhesive bonding, which may pose mechanical injury risks to operators and surface damage to the strands, and their accuracy is generally limited to ±0.05 mm. To address these limitations, this paper proposes a novel multi-camera machine vision -based measurement technique that utilizes a synchronized four-camera stereo vision system and a data-driven spatial deformation correction model to measure the elongation rate of prestressed steel strands under ultimate tensile loads. Unlike existing contact or single-camera systems, our approach captures real-time transverse and longitudinal deformations through synchronized multi-view imaging and processes them via an advanced spatial deformation model. Uniaxial tension tests were conducted on nine repeated samples of the same steel strand material, divided into three separate batches. The repeated tests were performed under consistent conditions to ensure reproducibility and reduce experimental randomness. All specimens shared the same diameter, twisting structure, and were tested within the ambient temperature range of 15 °C to 35 °C.Compared with reference strain gauge data (baseline error ±0.05 mm), the proposed method achieved a deviation of less than 0.02 mm across all scenarios. Its non-contact, high-precision measurement capability and adaptability to multiple strand types demonstrate feasibility for both laboratory testing and in-field inspections.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e05000"},"PeriodicalIF":6.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523469","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

Sustainable one-part engineered geopolymer composite with thermal insulation in coastal region: Utilizing red mud dual-function as precursor and activator 海岸带可持续单组分工程地聚合物复合材料：利用赤泥作为前驱体和活化剂的双重功能

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-30 DOI: 10.1016/j.cscm.2025.e04998

Hangbo Bi , Ziming Tang , Fei Wang , Lingzhi Li , Bakhadir Mirzaev , Kequan Yu , Lingfei Liu

{"title":"Sustainable one-part engineered geopolymer composite with thermal insulation in coastal region: Utilizing red mud dual-function as precursor and activator","authors":"Hangbo Bi , Ziming Tang , Fei Wang , Lingzhi Li , Bakhadir Mirzaev , Kequan Yu , Lingfei Liu","doi":"10.1016/j.cscm.2025.e04998","DOIUrl":"10.1016/j.cscm.2025.e04998","url":null,"abstract":"<div><div>Aiming to advance value-added utilization of red mud (RM) for mitigating its environmental footprint, this study strategically leverages its dual-function as both a silicon-aluminum geopolymerization precursor and alkali activator. A sustainable, easy-to-operate, and high-ductility one-part EGC with high RM incorporation and thermal insulation function were successfully developed. The density maintained around 1100 kg/m<sup>3</sup>, with a low thermal conductivity of 0.35 W/(m·K). Remarkably, EGCs containing 50 % and 80 % RM precursors exhibited compressive strengths exceeding 20 MPa and 10 MPa, respectively, which remained above 10 MPa even at 25 % alkali reduction. In addition, at merely 0.5 % fiber dosage, the EGC demonstrated tensile strength above 2 MPa, strain capacity exceeding 4 %, and controlled crack widths of around 200 μm. The tensile behavior evolution mechanism was revealed by synergistic matrix fracture toughness and fiber bridging capacity. Microstructural analysis revealed that increased RM incorporation and reduced alkali suppressed geopolymerization gel formation, compromising matrix densification while rarely affecting fiber-matrix interfacial bonding. The EGC achieved up to 44 % and 71 % reductions in embodied energy and embodied carbon compared to ordinary concrete, coupled with a 70 % cost reduction compared to conventional M45-ECC. Notably, the fiber-free matrix mortar attained cost parity with ordinary concrete. This work can provide an important reference for the preparation of sustainable and low-cost one-part EGC with thermal insulation function by recycling a large volume of RM.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04998"},"PeriodicalIF":6.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563819","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

Mitigating RAP variability through detailed particle size classification: Applications in high RAP content asphalt mixtures 通过详细的粒度分类减轻RAP的可变性：在高RAP含量沥青混合料中的应用

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-30 DOI: 10.1016/j.cscm.2025.e04993

Guangji Xu , Zan Shen , Siwen Hao , Mengze Du , Jing Hu

{"title":"Mitigating RAP variability through detailed particle size classification: Applications in high RAP content asphalt mixtures","authors":"Guangji Xu , Zan Shen , Siwen Hao , Mengze Du , Jing Hu","doi":"10.1016/j.cscm.2025.e04993","DOIUrl":"10.1016/j.cscm.2025.e04993","url":null,"abstract":"<div><div>High recycled asphalt pavement (RAP) content in asphalt mixtures provides substantial economic and environmental benefits. However, its application is hindered by performance instability caused by RAP variability. This study investigates a refined RAP particle size classification method that increases the grading levels from two to four, aiming to mitigate variability and enhance the performance of high RAP content mixtures. Laboratory-produced RAP was designed to simulate in-situ RAP properties with controlled variability in asphalt content, asphalt properties, and gradation. Recycled asphalt mixtures with RAP contents of 45 %, 60 %, and 100 % were evaluated for moisture sensitivity using immersion Marshall (retained stability) and freeze-thaw splitting tests (tensile strength ratio), low-temperature cracking resistance using semi-circular bending tests (fracture energy), and high-temperature stability using rutting tests (dynamic stability). Results demonstrate that RAP gradation variability predominantly impacts water stability, while asphalt content variability critically influences low-temperature performance. The refined classification method significantly reduced variability, enhanced mechanical properties, and stabilized overall performance. This approach offers a practical solution for improving the quality of high RAP content mixtures and advancing sustainable pavement construction practices.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04993"},"PeriodicalIF":6.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563818","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

Sagging behavior of precast NC beams with HPCs-filled wet joints incorporating pre-stressing technique 结合预应力技术的hpc填充湿缝预制NC梁的下垂特性

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-30 DOI: 10.1016/j.cscm.2025.e04997

Ahmed Hamoda , Galal Elsamak , Basant ramadan

{"title":"Sagging behavior of precast NC beams with HPCs-filled wet joints incorporating pre-stressing technique","authors":"Ahmed Hamoda , Galal Elsamak , Basant ramadan","doi":"10.1016/j.cscm.2025.e04997","DOIUrl":"10.1016/j.cscm.2025.e04997","url":null,"abstract":"<div><div>Precast segmental beams constructed with normal concrete (NC) are widely adopted in modern infrastructure because of their advantages in decreasing on-site labor, shortening construction time, and observing high-quality control. Such segmental beams might require using construction joint with superior characteristics. However, the presence of intermediate constriction joints introduces potential weaknesses, particularly under sagging loading, which may result in bond degradation, cracking, or interface failure. This investigation presents a comprehensive experimental and numerical investigation into the flexural performance of precast NC beams incorporating high-performance concrete (HPC)-filled wet joints of varying developed lengths (l<sub>d</sub>), subjected to post-tensioning force. A total number of nine full-scale beams were experimented under flexural moments until failure. The considered parameters were: HPC type employed in the joint (ultra-high performance concrete (UHPC) and engineered cementitious composite (ECC)), the l<sub>d</sub> values (15, 20, and 25 times the bar diameter (D)), and the pressurising condition applied through of post-tensioning system. The results demonstrated that specific combinations of these parameters significantly enhanced cracking resistance, initial stiffness and energy absorption. Moreover, integrating a pre-stressing system with a UHPC-filled wet joint and a developed length of 25D led to an approximate 98 % increase in ultimate load. A nonlinear three-dimensional finite element model (FEM) was constructed and validated against the experimental outcomes, yielding high accuracy with discrepancies less than 4 %. Additionally, a novel predictive equation for the ultimate moment capacity of the studied beams was formulated, exhibiting a mean error margin of about 3 %.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04997"},"PeriodicalIF":6.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519238","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

Optimizing the compatibility of pyrolytic carbon black and asphalt interfaces using silane coupling agents: A cross-scale approach 利用硅烷偶联剂优化热解炭黑与沥青界面的相容性：一种跨尺度方法

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-30 DOI: 10.1016/j.cscm.2025.e04996

Zhanglin Wu , Chuangmin Li , Qinhao Deng , Lubiao Liu , Chang Teng , Peng Guo

{"title":"Optimizing the compatibility of pyrolytic carbon black and asphalt interfaces using silane coupling agents: A cross-scale approach","authors":"Zhanglin Wu , Chuangmin Li , Qinhao Deng , Lubiao Liu , Chang Teng , Peng Guo","doi":"10.1016/j.cscm.2025.e04996","DOIUrl":"10.1016/j.cscm.2025.e04996","url":null,"abstract":"<div><div>This study systematically investigates the impact of three types of silane coupling agents on the molecular behavior of asphalt at the interface with pyrolytic carbon black (PCB) derived from waste tire pyrolysis, ranging from nano to macro scales. The goal is to provide a theoretical foundation for optimizing the compatibility of PCB-modified asphalt. Molecular dynamics models of the asphalt/coupling agent/PCB interface were constructed using Materials Studio software to analyze in detail how the dosage and type of coupling agent influence the compatibility at the asphalt/PCB interface. Furthermore, macroscopic compatibility tests, dynamic shear rheological (DSR) tests, and Fourier Transform Infrared Spectroscopy (FTIR) were performed to validate the simulation results and refine the optimization of the material formulation. The results show that the compatibility of PCB-modified asphalt significantly improves when the dosage of KH550 coupling agent is 1.34 %, and that of KH560 is 2.82 %, with improvements of 13.2 % and 12.5 %, respectively. Moreover, the molecular dynamics simulation results for KH560 and KH590 coupling agents correlate strongly with the macroscopic test results, further confirming the accuracy and reliability of the models. This study enriches the theoretical framework of PCB-modified asphalt compatibility and provides scientific guidance for material formulation design in practical applications.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04996"},"PeriodicalIF":6.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519237","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 performance of prestressed ECC-concrete composite T-beam bridge subjected to close-in blast loading 近距离爆破荷载作用下预应力混凝土-混凝土组合t梁桥的动力性能

IF 6.5 2区工程技术

Case Studies in Construction Materials Pub Date : 2025-06-29 DOI: 10.1016/j.cscm.2025.e04992

Zenghan Wu , Yuzhou Zheng , Wenwei Wang , Chang Zhou , Li Chen , Hengbo Xiang , Qin Fang , Hai Fang

{"title":"Dynamic performance of prestressed ECC-concrete composite T-beam bridge subjected to close-in blast loading","authors":"Zenghan Wu , Yuzhou Zheng , Wenwei Wang , Chang Zhou , Li Chen , Hengbo Xiang , Qin Fang , Hai Fang","doi":"10.1016/j.cscm.2025.e04992","DOIUrl":"10.1016/j.cscm.2025.e04992","url":null,"abstract":"<div><div>To enhance bridge resilience against extreme loads, the Engineered Cementitious Composites (ECC) was employed to improve the blast resistance of T-beam bridges in this study due to its high ductility and energy dissipation. A novel ECC-concrete composite T-section was designed and validated through blast tests. To further investigate the dynamic performance of prestressed ECC-concrete composite T-beam (PECT) bridge subjected to close-in blast loading, explosion test was conducted on three scaled-down T-beam bridge specimens. And a high-precision numerical analysis model was established using LS-DYNA and validated by the test data. The dynamic behavior of ECC was also accurately simulated using the K&C concrete model. Experimental and numerical results highlighting that the PECT bridge processed excellent deflection and local damage control capabilities, with a reduced mid-span flange damage compared to ordinary concrete T-beam specimen (PCT). Moreover, increasing the thickness of web ECC layer can significantly reduce peak deformation of the structure. And the application of ECC in flange helped control damage and maintain lateral integrity, but also increased the total energy input into the structure and reduced stiffness. Thus, rational matching of the ECC layers thickness in the composite section is crucial for enhancing blast resistance. This study provides valuable references for the assessment and design of ECC-concrete composite structures under explosive loads.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04992"},"PeriodicalIF":6.5,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513732","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