发布求助
文献互助 智能选刊 最新文献

Journal of Science and Technology in Civil Engineering (STCE) - HUCE最新文献

筛选
英文 中文
Investigation of the effects of opening size and location on punching shear resistance of flat slabs using Abaqus 利用Abaqus研究开孔尺寸和位置对平板冲剪抗力的影响
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-12
Nguyen Tuan Trung, P. T. Tung
{"title":"Investigation of the effects of opening size and location on punching shear resistance of flat slabs using Abaqus","authors":"Nguyen Tuan Trung, P. T. Tung","doi":"10.31814/stce.huce(nuce)2021-15(4)-12","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-12","url":null,"abstract":"The paper presents a numerical study on the effects of opening size and location on punching shear resistance of flat slabs without drop panels and shear reinforcement using ABAQUS. The study proposes an ABAQUS model that is enable to predict the punching shear resistance of flat slabs with openings. The model is validated well with the experimental data in literature. Using the validated numerical model, the effects of opening size and location on the punching shear resistance of flat slabs are then investigated, and the numerical results are compared with those predicted by ACI 318-19 and TCVN 5574:2018. The comparison between experimental and numerical results shows that the ABAQUS model is reliable. The punching shear resistances calculated by ACI 318-19 and TCVN 5574:2018 with different opening sizes and locations are agreed well to each other, since the design principles between two codes now are similar.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124954846","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: 1
Mix design of high-volume fly ash ultra high performance concrete 大掺量粉煤灰超高性能混凝土配合比设计
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-17
N. Tuan, P. S. Dong, L. T. Thanh, Nguyen Cong Thang, Yang Keun Hyeok
{"title":"Mix design of high-volume fly ash ultra high performance concrete","authors":"N. Tuan, P. S. Dong, L. T. Thanh, Nguyen Cong Thang, Yang Keun Hyeok","doi":"10.31814/stce.huce(nuce)2021-15(4)-17","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-17","url":null,"abstract":"The addition of supplementary cementitious materials (SCMs) to replace cement, especially with a high volume (> 50%), is an effective way to reduce the environmental impact due to the CO2 emissions generated in the production of ultra-high performance concrete (UHPC). Unfortunately, no official guidelines of UHPC using a high volume of SCMs have been published up to now. This paper proposes a new method of mix design for UHPC using high volume fly ash (HVFA), that is referred to the particle packing optimization of the Compressive Packing Model proposed by F. de Larrard. This proposed method also considers the heat treatment curing duration to maximize the compressive strength of HVFA UHPC. The experimental results using this proposed mix design method show that the optimum fly ash content of 50 wt.% of binder can be used to produce HVFA UHPC with a compressive strength of over 120 MPa and 150 MPa under standard curing and heat treatment, respectively. Moreover, the embodied CO2 emissions of UHPC reduces 56.4% with addition of 50% FA.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125578156","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: 1
Simplified calculation of flexural strength deterioration of reinforced concrete T-beams exposed to ISO 834 standard fire ISO 834标准火灾下钢筋混凝土t梁抗弯强度劣化的简化计算
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-11
N. Thang, Nguyen Hai Viet
{"title":"Simplified calculation of flexural strength deterioration of reinforced concrete T-beams exposed to ISO 834 standard fire","authors":"N. Thang, Nguyen Hai Viet","doi":"10.31814/stce.huce(nuce)2021-15(4)-11","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-11","url":null,"abstract":"Reinforced concrete (RC) T-shaped cross-section beam (so-called T-beam) is a common structural member in buildings where beams and slabs are monolithically cast together. In this paper, a simplified calculation method based on Russian design standard SP 468.1325800.2019 is introduced to determine the flexural strength of RC T-beams when exposed to ISO 834 standard fire. The idea of 500oC isotherm method, which is stipulated in both Eurocodes (EC2-1.2) and SP 468, is applied associated with specifications of temperature distribution on T-beams’ cross sections and the temperature-dependent mechanical properties of concrete and reinforcing steel. A case study is conducted to explicitly calculate the flexural strength deterioration (FSD) of T-beams compared to that at ambient temperature. A calculation sheet is established for parametric studies, from which the results show that the FSD factor of RC T-beams is adversely proportional to the dimensions of the beam’s web and flange. However, the effect of these components of T-beams is not significant.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129873413","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
Optimization of steel roof trusses using machine learning-assisted differential evolution 基于机器学习辅助差分进化的钢屋架优化
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-09
N. Hieu, N. Q. Cường, V. Tuan
{"title":"Optimization of steel roof trusses using machine learning-assisted differential evolution","authors":"N. Hieu, N. Q. Cường, V. Tuan","doi":"10.31814/stce.huce(nuce)2021-15(4)-09","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-09","url":null,"abstract":"A steel truss is a preferred solution in large-span roof structures due to its good attributes such as lightweight, durability. However, designing steel trusses is a challenging task for engineers due to a large number of design variables. Recently, optimization-based design approaches have demonstrated the great potential to effectively support structural engineers in finding the optimal designs of truss structures. This paper aims to use the AdaBoost-DE algorithm for optimizing steel roof trusses. The AdaBoost-DE employed in this study is a hybrid algorithm in which the AdaBoost classification technique is used to enhance the performance of the Differential Evolution algorithm by skipping unnecessary fitness evaluations during the optimization process. An example of a duo-pitch steel roof truss with a span of 24 meters is carried out. The result shows that the AdaBoost-DE achieves the same optimal design as the original DE algorithm, but reduces the computational cost by approximately 36%.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117095430","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
A simplified variant of the time finite element methods based on the shape functions of an axial finite bar 基于轴向有限杆形状函数的时间有限元法的一种简化形式
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-04
Thanh Nguyen, L. T. Tran
{"title":"A simplified variant of the time finite element methods based on the shape functions of an axial finite bar","authors":"Thanh Nguyen, L. T. Tran","doi":"10.31814/stce.huce(nuce)2021-15(4)-04","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-04","url":null,"abstract":"In the field of structural dynamics, the structural responses in the time domain are of major concern. There already exist many methods proposed previously including widely used direct time integration methods such as ones in the β-Newmark family, Houbolt’s method, and Runge-Kutta method. The time finite element methods (TFEM) that followed the well-posed variational statement for structural dynamics are found to bring about a superior accuracy even with large time steps (element sizes), when compared with the results from methods mentioned above. Some high-order time finite elements were derived with the procedure analogous to the conventional finite element methods. In the formulation of these time finite elements, the shape functions are like the ones for a (spatial) 2-order finite beam. In this article, a simplified variant for the TFEM is proposed where the shape functions similar to the ones for a (spatial) axial bar are used. The accuracy in the obtained results of some numerical examples is found to be comparable with the accuracy in the previous results.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"318 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116437025","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
Free vibration and dynamic response of sandwich composite plates with auxetic honeycomb core 蜂窝芯夹层复合材料的自由振动与动力响应
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-01
Tran Huu Quoc, T. M. Tu, V. Tham
{"title":"Free vibration and dynamic response of sandwich composite plates with auxetic honeycomb core","authors":"Tran Huu Quoc, T. M. Tu, V. Tham","doi":"10.31814/stce.huce(nuce)2021-15(4)-01","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-01","url":null,"abstract":"This paper deals with the free vibration and dynamic responses of composite sandwich plates. The sandwich plate has three layers in which two face sheets are made of isotropic material, and the core layer is made of auxetic honeycomb structures with a negative Poisson's ratio.  A smoothed finite element model based on the first-order shear deformation theory is established for the analysis purpose. In the model, only the linear approximation is necessary, and the discrete shear gap method for triangular plate elements is used to avoid the shear locking. The Newmark direct integration technique is used to capture the dynamic responses of the sandwich plates. The convergence study is made, and the accuracy of present results is validated by comparison with available data in the literature. The influence of geometrical parameters, material properties, and boundary conditions are explored and discussed. Numerical results show that auxetic materials have several different responses compared to conventional materials, and these behaviors are strongly influenced by the internal structure of the auxetic material.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124372333","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
Experimental study on the behavior of eccentrically compressed reinforced concrete columns strengthened with CFRP composite sheets CFRP复合板加固偏心受压钢筋混凝土柱性能试验研究
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-15
Trung Hieu Nguyen, X. Pham, K. Tran
{"title":"Experimental study on the behavior of eccentrically compressed reinforced concrete columns strengthened with CFRP composite sheets","authors":"Trung Hieu Nguyen, X. Pham, K. Tran","doi":"10.31814/stce.huce(nuce)2021-15(4)-15","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-15","url":null,"abstract":"Strengthening of reinforced concrete (RC) columns is needed when the actual load-carrying capacity of the columns does not reach the required level due to either structural deterioration or increasing acting loads. This experimental study aims to evaluate the strengthening effect on the eccentrically-compressed RC columns using Carbon fiber reinforced polymer (CFRP) sheets, that confine around the column cross-section. Three RC column specimens with the same geometrical dimensions, reinforcement detailing, and concrete compressive strength were cast and tested in the current experimental investigation. One RC column without being strengthened is referred as the control specimen whereas two other RC columns were partially strengthened by CFRP sheets. All three RC columns were axially loaded with the same initial eccentricity e0 of 80 mm. Based on the test results such as the ultimate load-carrying capacity, the load-rotation relationship, and load-curvature at the middle of column height, the effectiveness of the strengthening technique is discussed.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121735575","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
Free vibration of piezoelectric FGM sandwich beam with porous core embedded in thermal environment and elastic foundation 热环境和弹性地基中嵌入多孔芯的FGM压电夹层梁的自由振动
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-02
Tran Quang Hung, T. M. Tu, D. M. Duc
{"title":"Free vibration of piezoelectric FGM sandwich beam with porous core embedded in thermal environment and elastic foundation","authors":"Tran Quang Hung, T. M. Tu, D. M. Duc","doi":"10.31814/stce.huce(nuce)2021-15(4)-02","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-02","url":null,"abstract":"This paper aims to present thermo-electrical free vibration characteristics of functionally graded material (FGM) sandwich beam placed on the two-parameter elastic foundation. The beam is constructed of a foam core, two middle FGM layers, and two outer piezoelectric layers. It is assumed that the beam is subjected to a constant voltage and a uniform/linear temperature distribution. Physical properties of the core and two middle layers vary smoothly through the thickness according to the cosine and power-law forms, respectively. Lagrange equations in conjunction with the Reddy third-order beam theory is employed to derive the governing equations of motion. A simple polynomial trial function-based Ritz method is adopted for the approximation of the displacement field to obtain the vibration response. The correctness of the study is verified by comparisons with other authors’ published results. Influences of geometry parameters, material property distribution, applied voltage, elastic foundation, temperature distribution, temperature change, porosity coefficient, span-to-height ratio, and boundary conditions are investigated through parametric studies.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116976236","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: 1
Numerical study on the flexural performance of RC beams with externally bonded CFRP sheets CFRP外粘结RC梁抗弯性能的数值研究
Journal of Science and Technology in Civil Engineering (STCE) - HUCE Pub Date : 2021-10-31 DOI: 10.31814/stce.huce(nuce)2021-15(4)-16
N. N. Tan, N. Kien, N. H. Giang
{"title":"Numerical study on the flexural performance of RC beams with externally bonded CFRP sheets","authors":"N. N. Tan, N. Kien, N. H. Giang","doi":"10.31814/stce.huce(nuce)2021-15(4)-16","DOIUrl":"https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-16","url":null,"abstract":"The numerical investigations on the structural performance of reinforced concrete (RC) beam strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) sheets are presented. The nonlinear characteristics of materials (i.e., stress-strain relationships of steel reinforcement, concrete, CFRP, and CFRP/concrete bond stress-slip behavior) were adopted in three-dimensional finite element (FE) models. The validation of FE models was conducted by comparing the laboratory works carried out on two RC beam specimens with 2000 mm length, 300 mm height, and 120 mm width. The numerical results show a good correlation with the experimental results of the beam specimens, such as load-displacement curves, crack patterns, and failure modes. They allow confirming the capability of the developed FE model to predict the flexural performance of strengthened beams considering CFRP/concrete interfacial behavior. Furthermore, parametric investigations were performed to determine the effect of flexural strengthening schemes, CFRP length with or without U-wraps, and multiple CFRP layers on the flexural performance of strengthened beams.","PeriodicalId":387908,"journal":{"name":"Journal of Science and Technology in Civil Engineering (STCE) - HUCE","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126502411","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信