Journal of Structural Integrity and Maintenance最新文献_第6页

Time history analysis for investigation of dynamic behavioral characteristics of uninterruptible power supply system 不间断电源系统动态行为特性研究的时程分析

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-03-13 DOI: 10.1080/24705314.2021.2018792

Seungjea Lee, Ji-Eon Lee, N. Dinh, K. Choi

引用次数: 1

Passive control of feather fault offshore wind turbine under combined earthquake wind and wave loads 地震风浪复合荷载作用下羽状断层海上风力发电机的被动控制

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-03-13 DOI: 10.1080/24705314.2021.2018842

Zuxing Pan, Wen-hua Wang, Xin Li, Fabo Chen, Zhenqiang Jiang

引用次数: 1

Synchronization of the yield as a way to increase integrity and bearing capacity of the frame supports 同步屈服作为一种方式，以增加完整性和承载能力的框架支持

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-01-02 DOI: 10.1080/24705314.2021.1971890

V. Nazimko

引用次数: 2

A study on the carbonation of binary and ternary blended cement mortar and concrete 二元和三元水泥砂浆与混凝土的碳化研究

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-01-02 DOI: 10.1080/24705314.2021.1971892

Shaik Hussain, Dipendu Bhunia, S. Singh, J. Yadav

{"title":"A study on the carbonation of binary and ternary blended cement mortar and concrete","authors":"Shaik Hussain, Dipendu Bhunia, S. Singh, J. Yadav","doi":"10.1080/24705314.2021.1971892","DOIUrl":"https://doi.org/10.1080/24705314.2021.1971892","url":null,"abstract":"ABSTRACT Carbonation of concrete has always been a durability concern leading to the corrosion of steel in reinforced concrete. The present paper deals with carbonation resistance of cement mortar and concrete when supplementary cementitious materials like fly ash and blast furnace slag partially replaces cement. The work had been carried out in two phases, first being the measure of carbonation depth and compressive strength of the samples with water binder ratios of 0.35, 0.5 and 0.65 to train the artificial neural network. Based on the results from carbonation depth, the consistency of Fick’s law of diffusion that governs the carbon dioxide (CO2) ingress into concrete has been ascertained with the help of linear-programming problem. In the second phase of the study, cement mortar samples of water binder ratios 0.4, 0.5 and 0.6 had been tested to verify the reliability of phenolphthalein indicator in identifying the depth of carbonation with the help of microscopic analysis such as Thermo gravimetric analysis (TGA). The same specimens have been used to identify the phases of crystalline materials of post-carbonation samples using X-Ray diffraction (XRD). An attempt has been made to quantify the carbonated products of calcium hydroxides and C-S-H.","PeriodicalId":43844,"journal":{"name":"Journal of Structural Integrity and Maintenance","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45264240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Mechanical properties of additive manufactured variable-density Kelvin lattice structures: a novel design method for Kelvin unit cells 增材制造变密度开尔文晶格结构的力学性能:一种新的开尔文单元格设计方法

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-01-02 DOI: 10.1080/24705314.2021.1971893

K. Park, Gil-Oh Kim, Jung-Gil Kim, Y. Roh

{"title":"Mechanical properties of additive manufactured variable-density Kelvin lattice structures: a novel design method for Kelvin unit cells","authors":"K. Park, Gil-Oh Kim, Jung-Gil Kim, Y. Roh","doi":"10.1080/24705314.2021.1971893","DOIUrl":"https://doi.org/10.1080/24705314.2021.1971893","url":null,"abstract":"ABSTRACT Behaviors associated with the mechanical responses of a Kelvin unit cell can be improved by optimizing the parameter sets. Herein, we present a shape control method for a Kelvin unit cell by functionalizing the coordinates of 24 vertices. Further, we verified the physical properties of Kelvin lattice structures using relative density and lattice patterning through finite element analysis (FEA). Consequently, we devised a design method for the Kelvin unit cell that can control the cell aspect ratio. Furthermore, we estimated the relative density using the strut section and interior angles of a hexagon as variables, and achieved an accuracy of 96.3–99.7%. The FEA results revealed that with an increase in the relative density of the 1 × 1 × 1 lattice structure of titanium alloy to 0.00800, 0.03065, 0.11194, 0.22789 and 0.36246, the yield strength sharply increased to 0.67, 2.79, 10.23, 27.27 and 51.82 MPa, respectively. When the 1 × 1 × 1, 2 × 2 × 2, 3 × 3 × 3 and 4 × 4 × 4 lattice structures were configured with mm, the yield strength of the lattice structure converged in the 3 × 3 × 3 pattern.","PeriodicalId":43844,"journal":{"name":"Journal of Structural Integrity and Maintenance","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49239175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Synergetic effect of fly ash and silica fume on the performance of high volume fly ash self-compacting concrete 粉煤灰与硅灰对大体积粉煤灰自密实混凝土性能的协同效应

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-01-02 DOI: 10.1080/24705314.2021.1892571

Shashikant Kumar, B. Rai

{"title":"Synergetic effect of fly ash and silica fume on the performance of high volume fly ash self-compacting concrete","authors":"Shashikant Kumar, B. Rai","doi":"10.1080/24705314.2021.1892571","DOIUrl":"https://doi.org/10.1080/24705314.2021.1892571","url":null,"abstract":"ABSTRACT This paper is focused on the feasibility of replacing the cement with industrial wastes like fly ash (FA) and silica fume (SF). The goal is to improve the mechanical and durability characteristics of self-compacting concrete (SCC) and to find an application of high volume fly ash (HVFA) in SCC which can be environmentally sustainable. In this study, the replacement of cement with FA has been examined in various proportions from 0% to 100%. The durability properties of different SCC mixtures such as sorptivity and chloride ion penetration resistance were investigated. Similar tests were carried out with the incorporation of SF from 2% to 10% to the HVFA-SCC mixes. The mechanical properties of HVFA-SCC were significantly influenced by SF additions to the mixes. These mixtures showed low water penetrability and high resistance to penetration of chloride ion. Based on the experimental findings a relationship between sorptivity and chloride ion permeability has been projected. The synergetic effect of FA and SF on the performance of HVFA-SCC was done using the Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) techniques. The study gives an indication of synergy arising from the pozzolanic activity and filler effects of SF in HVFA-SCC mixes.","PeriodicalId":43844,"journal":{"name":"Journal of Structural Integrity and Maintenance","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45527545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Shear strength investigation of the carbon fiber reinforced polymer-wrapped concrete beams using gene expression programming and finite element analysis 基于基因表达式编程和有限元分析的碳纤维包覆混凝土梁抗剪强度研究

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-01-02 DOI: 10.1080/24705314.2021.1971891

Wassel Al-Bodour, Y. Murad, Rana Imam, Yahia Smadi

{"title":"Shear strength investigation of the carbon fiber reinforced polymer-wrapped concrete beams using gene expression programming and finite element analysis","authors":"Wassel Al-Bodour, Y. Murad, Rana Imam, Yahia Smadi","doi":"10.1080/24705314.2021.1971891","DOIUrl":"https://doi.org/10.1080/24705314.2021.1971891","url":null,"abstract":"ABSTRACT Existing analytical and numerical models available in the literature can predict the shear strength of CFRP in RC beams based on the FRP strains and this requires measuring the FRP strain values. This research aims to predict the shear strength of CFRP in RC beams without the need to calculate the strains in FRP. Therefore, Gene Expression Programming (GEP) is used in this research to forecast the contribution of the CFRP to shear strength in the RC beams without the need for calculating the strain of the CFRP. A comparison was later performed amongst the empirical findings of the developed GEP model and other models available in published research. The adequate accuracy and highest predictive ability were noticed for the developed GEP model relative to the models published previously. Strengthened reinforced concrete (RC) beams with epoxy-bonded carbon fiber reinforced polymer (CFRP) sheets at various angles of orientation were examined to investigate their shear behavior. The experimental outcomes of the tested specimens were then applied to build a finite element (FE) model using ABAQUS. The proposed FE model was able to forecast the experimental behavior of the samples examined with sufficient precision.","PeriodicalId":43844,"journal":{"name":"Journal of Structural Integrity and Maintenance","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41582201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Delamination/disbond propagation analysis in adhesively bonded composite joints using guided waves 用导波分析粘接复合材料接头的分层/脱粘传播

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2022-01-02 DOI: 10.1080/24705314.2021.1971894

L. Šedková, V. Vlk, J. Šedek

{"title":"Delamination/disbond propagation analysis in adhesively bonded composite joints using guided waves","authors":"L. Šedková, V. Vlk, J. Šedek","doi":"10.1080/24705314.2021.1971894","DOIUrl":"https://doi.org/10.1080/24705314.2021.1971894","url":null,"abstract":"ABSTRACT This paper investigates debonding and delamination assessment by means of Lamb waves in adhesively bonded composite joints. Adhesively bonded wide CFRP panels with initial delamination were subjected to fatigue loading. A segment of a group velocity dispersion curve was constructed for the plain panel and the bonded section. The fundamental asymmetrical Lamb wave mode (A0) was utilized to evaluate damage propagation. The depth of debonding/delamination and the extent of the damage within the bonded section were analyzed in relation to the group velocity change of the A0 mode. The results indicate that a suitable sensor placement and a proper frequency selection enable the assessment of the interface failure in the three-layer system. Based on the time delays, it was possible to distinguish delamination in the specific adherent. Metallographic analysis confirmed the depth of delamination propagation. Guided wave-based measurements were compared to and verified with ultrasonic A-scans. Additionally, RAPID algorithm was utilized to visualize damage extent with the first damage detection in 29.4 % of the fatigue life.","PeriodicalId":43844,"journal":{"name":"Journal of Structural Integrity and Maintenance","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43755766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A novel approach for deterioration and damage identification in building structures based on Stockwell-Transform and deep convolutional neural network 基于stockwell变换和深度卷积神经网络的建筑结构退化与损伤识别新方法

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2021-11-11 DOI: 10.1080/24705314.2021.2018840

V. Gharehbaghi, H. Kalbkhani, E. N. Farsangi, Tony T. Y. Yang, A. Nguyen, S. Mirjalili, C. Málaga‐Chuquitaype

引用次数: 6

Flexural load-rating of slab-on-girder bridges by nonlinear proxy finite-element analysis 基于非线性代理有限元分析的板梁桥抗弯承载能力

IF 2.1

Journal of Structural Integrity and Maintenance Pub Date : 2021-10-02 DOI: 10.1080/24705314.2021.1934798

Andrew P. Schanck, W. Davids

{"title":"Flexural load-rating of slab-on-girder bridges by nonlinear proxy finite-element analysis","authors":"Andrew P. Schanck, W. Davids","doi":"10.1080/24705314.2021.1934798","DOIUrl":"https://doi.org/10.1080/24705314.2021.1934798","url":null,"abstract":"ABSTRACT The proxy finite-element analysis (PFEA) technique is significantly extended to improve its utility and its predictions of bridge ultimate capacity are verified. Refinements and extensions to the method include a substantial reduction in up-front computational effort, explicit consideration of the effects of skewness on bridge behavior, and expansion of the technique’s mechanics formulation to include the effects of prestressing. PFEA’s prediction of ultimate flexural capacity is verified by simulating the capacity of a previously conducted, full-scale destructive test of a prestressed concrete girder bridge with good prediction of recorded load-deflection data. Live-load testing (LLT) of five, skewed, reinforced concrete bridges is described. The tested bridges are then load-rated by PFEA, leading to average increase in rating factor exceeding 120%, as compared with an average increase of 34.9% with LLT. This demonstrates that PFEA’s consideration of material nonlinearity leads to larger increases in predicted capacity while retaining the conservative assumptions required by design and analysis codes. Practical usage and implementation of PFEA are addressed, including application to ratings and permitting.","PeriodicalId":43844,"journal":{"name":"Journal of Structural Integrity and Maintenance","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45812993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0