Saudi Journal of Civil Engineering最新文献_第4页

Modelling Studies of Retrofitted Anchorage System in Exterior Beam Column Joint by Supplementary Steel 外梁柱节点补钢加固锚固体系的建模研究

Saudi Journal of Civil Engineering Pub Date : 2022-09-04 DOI: 10.36348/sjce.2022.v06i09.001

P. K, R. K, S. K

{"title":"Modelling Studies of Retrofitted Anchorage System in Exterior Beam Column Joint by Supplementary Steel","authors":"P. K, R. K, S. K","doi":"10.36348/sjce.2022.v06i09.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i09.001","url":null,"abstract":"A Nonlinear finite element based ABAQUS modeling studies were conducted to evaluate the performance of exterior Beam Column Joint (BCJ) under quasi-static test loads. Six integrated BCJ models representing different configurations of beam reinforcement anchored in joint are verified by using a novel retrofitting technique called \"Post Installation of Supplementary Anchorage\" (PISA) by using headed bar as supplementary steel. The configuration of beam reinforcement anchored in column are described by straight bar,90 degree bend ,180 degree hook (confirming to design code IS456:2000) and single head, double head bars (confirming to ACI 318-19, ACI 352R-02 ) and 90 degree long bend of ductile detailing (as per IS 13920-2016). Two series (A&B) of integrated joint specimens representing conventional (series-A) and retrofitted anchorage (series-B) systems are modeled and tested by using ABAQUS software. The test parameters considered are configuration of anchorage system and presence of supplementary anchorage. The test variables representing nonlinear performance of retrofitted joint system are Von Mises stress conditions, Principal tensile stress, Moment-Rotation, Degraded stiffness, Crack mechanics and Damage index. The results shows good improvement of post failure conditions of exterior beam-column joint such as relocation of plastic hinge mechanism and failure mechanics of retrofitted joint system. Also the results validated with experimental program on typical specimens casted and tested. This study imparts useful information on implicit retrofitting methods applied by external means in exterior beam-column joint. It also promotes performance based design principles with viable construction practice.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127736610","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

Compressive Strength and Optimization of Concrete Produced by Replacing Cement with Coconut Shell Ash (CSA) and Groundnut Shell Ash (GSA) 椰壳灰(CSA)和花生壳灰(GSA)替代水泥生产混凝土的抗压强度及优化

Saudi Journal of Civil Engineering Pub Date : 2022-08-21 DOI: 10.36348/sjce.2022.v06i08.002

Sidi Yusuf Abdurrahman, Bunyamin Ayodeji Olawumi, Yakubu Idris, Ashiru Mode, Mohammed Abdulmumin Nda

{"title":"Compressive Strength and Optimization of Concrete Produced by Replacing Cement with Coconut Shell Ash (CSA) and Groundnut Shell Ash (GSA)","authors":"Sidi Yusuf Abdurrahman, Bunyamin Ayodeji Olawumi, Yakubu Idris, Ashiru Mode, Mohammed Abdulmumin Nda","doi":"10.36348/sjce.2022.v06i08.002","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i08.002","url":null,"abstract":"The compressive strength and optimization of concrete produced by replacing cement with CSA and GSA was conducted in this study. The materials used were cement, water, fine aggregate, coarse aggregate, CSA, and GSA. The CSA and GSA replaced cement at 5, 10, 15, 20, and 25% in combination, with a total of seventy two (72) cubes cast, while the concrete compressive strength was determined after curing by complete immersion in water at 7, 14, 21, and 28 days. The modeling and optimization was done with the aid of design expert (version 13) software, while the Analysis of Variance (ANOVA) was done using SPSS (Statistical Package for Social Sciences) version 23 and adopting the Least Square Difference (LSD) method. Results from the findings showed that the CSA used in the study is a good reactive pozzolana, and the GSA is not a reactive pozzolana. Also, the increase in CSA and GSA content in concrete reduces its workability, and concrete compressive strength. However, cement replaced with 5%CSA-0%GSA gave the optimum 28 days compressive strength which is not statistically significantly from the control concrete and can be used to produce concrete of compressive strength close to the control. Further findings from the regression model showed that CSA-GSA concrete compressive strength significantly fits a linear model and can be used to predict the 7, 14, 21, and 28 days compressive strength of CSA-GSA concrete, while the optimized result showed that CSA and GSA replacement of cement at 3.29% and 4.45% respectively yielded an optimum compressive strength of approximately 22.31N/mm2.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124332896","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

Modeling and Optimization of Concrete Compressive Strength Produced by Replacing Natural Aggregate with Recycled Coarse and Recycled Asphalt Pavement Aggregates 再生粗料和再生沥青路面骨料替代天然骨料产生的混凝土抗压强度建模与优化

Saudi Journal of Civil Engineering Pub Date : 2022-08-11 DOI: 10.36348/sjce.2022.v06i08.001

A. Lawan, Aliyu Abubakar Abbas, J. Ochepo

{"title":"Modeling and Optimization of Concrete Compressive Strength Produced by Replacing Natural Aggregate with Recycled Coarse and Recycled Asphalt Pavement Aggregates","authors":"A. Lawan, Aliyu Abubakar Abbas, J. Ochepo","doi":"10.36348/sjce.2022.v06i08.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i08.001","url":null,"abstract":"The modeling and optimization of concrete compressive strength produced by replacing natural aggregate (NA) with recycled coarse aggregate (RCA) and recycled asphalt pavement (RAP) aggregates was investigated. The materials used were cement, water, fine aggregate, and coarse aggregate (NA, RCA, and RAP). The RCA and RAP replaced NA at 20, 40, 60, 80, and 100% separately, and in combination, with a total of two hundred and forty (240) cubes cast, while the concrete compressive strength was determined after curing by complete immersion in water at 3, 7, 14, 21, and 28 days. The modeling and optimization was done with the aid of design expert (version 13) software, while the Analysis of Variance (ANOVA) was done using SPSS (Statistical Package for Social Sciences) version 23 and adopting the Least Square Difference (LSD) method. Results from the findings showed that the optimum 28 days concrete compressive strength are concrete produced with 20%RAP, 40%(20%RAP +20%RCA), 60%(30%RAP + 30%RCA), and 80%(40%RAP + 40%RCA) replacements which are not significantly different from the control concrete, however, 40%(20%RAP +20%RCA) and 80%(40%RAP + 40%RCA) concrete had compressive strength higher than the control concrete. Also, the 3, 7, 21, and 28 days compressive strength can be predicted with quadratic model, while the 14 days strength can be predicted with 2-Factor Interaction (2FI) model. The optimization result showed that by replacing natural aggregate with 10.0% RAP and 50.0% RCA, the 28 days compressive strength of the concrete was 33.74N/mm2.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125959610","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

Self-Potential; Thinking Style, Emotional Response, and Communication Patterns for New Students at the University of Lampung (UNILA) in 2021 自然电位;南榜大学2021年新生的思维方式、情绪反应和沟通模式

Saudi Journal of Civil Engineering Pub Date : 2022-07-29 DOI: 10.36348/sjce.2022.v06i07.003

Muhammad Nurwahidin, Moch. Johan Pratama

引用次数: 0

Impact of Climate on the Environment: Effect of Driving Rain on Buildings and Monuments in Port Harcourt, South-South Nigeria 气候对环境的影响:驱动降雨对尼日利亚南南哈科特港建筑和纪念碑的影响

Saudi Journal of Civil Engineering Pub Date : 2022-07-19 DOI: 10.36348/sjce.2022.v06i07.002

Alexander Chinago Budnukaeku, Irimiagba Gibson Francis

{"title":"Impact of Climate on the Environment: Effect of Driving Rain on Buildings and Monuments in Port Harcourt, South-South Nigeria","authors":"Alexander Chinago Budnukaeku, Irimiagba Gibson Francis","doi":"10.36348/sjce.2022.v06i07.002","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i07.002","url":null,"abstract":"This work is an attempt to understand the effect of climate in an environment, therefore the effect of driving rain on buildings and on monuments is considered a case study. The study area is Port Harcourt Metropolis, a subequatorial climate environment, located in southern part of Nigeria. The study made use of questionnaire, and response were analyse using a descriptive statistical tool (simple percentage and pie chart). The study observed among other things that driving rain defaces buildings and monuments. Furthermore majority of those interviewed are of the opinion that driving rain has made them spend more money in building and monument maintenance as the case may be. It was also observed that driving rain contributes to rill erosion within and around buildings and monuments. The study also finds out that driving rain affects the strength of buildings negatively, and that electrical appliance can also be affected. This work suggests among other things, that water resistance paints and material should be used on buildings and monuments. The windward side of buildings should be designed in a way that the effect of driving rain should be minimal on the wall or windows. Furthermore, materials like books, cloths and other weather sensitive materials should be kept away from the damp windward side of the rooms. This implies that wardrobes should not be fixed or constructed in the windward side of the building. The study suggested that strong materials and standard specification of concrete mixture and standard original materials should be used in building construction especially in a humid environment like Port Harcourt metropolis. Finally, geographical factors need to be considered before building construction and professionals should be engaged in the business of building of houses and monuments construction to avoid collapse and damages.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128818525","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

Rheological Characterization of Asphalt Binders Containing Rejuvenated Reclaimed Asphalt Pavement 含再生沥青路面沥青粘结剂的流变特性研究

Saudi Journal of Civil Engineering Pub Date : 2022-07-05 DOI: 10.36348/sjce.2022.v06i07.001

Kamaluddin Kamal, A. Hamdi, S. Zahran

{"title":"Rheological Characterization of Asphalt Binders Containing Rejuvenated Reclaimed Asphalt Pavement","authors":"Kamaluddin Kamal, A. Hamdi, S. Zahran","doi":"10.36348/sjce.2022.v06i07.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i07.001","url":null,"abstract":"The use of reclaimed asphalt pavement (RAP) in freshly hot mixed asphalt (HMA) can save on material costs, preserve energy, and protect the environment. Employing limited amount of RAP in the production of asphalt mixes can result in similar performance as normal mixtures. However, adding more RAP can reduce the HMA’s mixing efficiency and could make the asphalt mixture more susceptible to fatigue and low-temperature cracking. Vegetable oil can act as a rejuvenator and reduce the HMA deficiencies with a high RAP percentage. This study investigated the potential effect of two vegetable oils; namely soybean oil (SOY) and sunflower oil (SnF), as rejuvenators on the properties of asphalt binders that contain 40% of RAP binder. To determine the optimum dosage of the rejuvenators (SOY and SnF), the properties of the rejuvenated RAP binders were carried out by conducting the penetration, softening point, viscosity, dynamic shear rheometer (DSR), and bending beam rheometer (BBR) tests. The test results indicated that vegetable oils could provide better fatigue and low-temperature cracking resistance with acceptable rutting performance. Furthermore, it is observed that, for the abovementioned properties, the addition of the 6%SOY and 3%SnF were more feasible in restoring the 40RAP binder to its original properties.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133806289","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

Effect of Corrosion on Bond Strength of Tension Lap-Splices 腐蚀对拉伸搭接件粘结强度的影响

Saudi Journal of Civil Engineering Pub Date : 2022-06-09 DOI: 10.36348/sjce.2022.v06i06.002

A. Shihata

引用次数: 0

The Influence of Fraud Triangel and Personal Attitude on the Fraud Tendency to use School Operational Assistance (SOA) Funds (Case Study at Elementary School in Cikarang Barat District, Bekasi Regency) 欺诈三角和个人态度对学校运营援助(SOA)资金使用欺诈倾向的影响(以勿加泗县Cikarang Barat区小学为例)

Saudi Journal of Civil Engineering Pub Date : 2022-06-09 DOI: 10.36348/sjce.2022.v06i06.001

Fuad Azhar Naufal, D. Surjandari, Nurul Hidayah

{"title":"The Influence of Fraud Triangel and Personal Attitude on the Fraud Tendency to use School Operational Assistance (SOA) Funds (Case Study at Elementary School in Cikarang Barat District, Bekasi Regency)","authors":"Fuad Azhar Naufal, D. Surjandari, Nurul Hidayah","doi":"10.36348/sjce.2022.v06i06.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i06.001","url":null,"abstract":"This study aims to examine the effect of Fraud Triangel, and Personal Attitude on the tendency of fraudulent use of SOA funds (a case study in an elementary school in West Cikarang District, Bekasi Regency). The population of this study was 45 public elementary schools in West Cikarang sub-district. Researchers took the entire population as a sample. This research method is a quantitative method. Based on the results of the research and discussion conducted, it can be concluded that the results of the analysis and hypothesis testing indicate that H1 is rejected and H2 is accepted. This finding implies that in general the Fraud Triangel (X1) has no effect on the use of SOA funds (Y) in Elementary School Education institutions, but Personal Attitude (X2) affects the use of SOA funds (Y) in Elementary School Education institutions. The results of the questionnaire illustrate that there is no fraudulent fraud found in the financial statements. This proves the results of the empirical analysis on the Sig value test. Sig. for the effect of Fraud Triangel (X1) on (Y) the use of SOA funds is 3.50 > 0.05 and the t value is 7.39 > t table 3.29, so it can be concluded that H1 is rejected which means there is no influence of Fraud Triangel (X1) on (Y) trend fraudulent use of SOA funds. Based on the results of hypothesis testing that has been carried out, it is found that Personal Attitude (X2) has an effect on the use of SOA funds, this is known from the value of Sig. for the influence of Personal Attitude (X2) on Y the tendency of fraudulent use of SOA funds is 0.005 < 0.05 and the t value is 2.895 < t table 3.295, so it can be concluded that H1 is accepted which means that there is an influence of Personal Attitude (X2) on (Y) the use of funds. SOA. Personal Attitude has a Positive Effect on the use of SOA Funds.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121486148","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

Effect of Nonlinear Modeling of Beam-Column Joint on Pushover Analysis 梁柱节点非线性建模对推覆分析的影响

Saudi Journal of Civil Engineering Pub Date : 2022-05-20 DOI: 10.36348/sjce.2022.v06i05.002

A. Sadek, Mohammed Moiz Khan

{"title":"Effect of Nonlinear Modeling of Beam-Column Joint on Pushover Analysis","authors":"A. Sadek, Mohammed Moiz Khan","doi":"10.36348/sjce.2022.v06i05.002","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i05.002","url":null,"abstract":"The present paper is concerned with the seismic risk assessment of buildings in the Kingdom of Saudi Arabia. A critical review of the existing literature is presented to identify the shortcomings of extant studies. None of the extant studies considered nonlinear action of the beam-column joint (BCJ) but rather they dealt with BCJ as a rigid element for simplicity and the only plastic hinging has been considered in beams and/or columns. Hence the main focus of this paper is to demonstrate the significant effects of the nonlinear action of BCJ in the pushover analysis and in turn the inadequacy of all previous studies which overlooked such effect. In this study, nonlinear static pushover analysis is performed on two-dimensional RC frames of existing buildings in Jeddah city, with and without using macro node elements and pushover curves are compared. The beam-column joint modelling approach adopted in this study is through macro node element which accounts for failure due to shear collapse of the joint, concrete crushing, flexural and/or shear plastic damage of the beams or columns connected and bond-slip failure. The results clearly indicate that the RC frame in which the beam-column joints were modeled using a macro node element, tends to have lesser base shear values and higher displacement capacity when compared to the RC frame modeled without using the macro node. Furthermore, the status of plastic hinges developed in building frames modeled without using macro node element was found to be within the Immediate occupancy (IO) performance level, but this hinge status drastically changed to Collapse prevention (CP) performance level when BCJ was modeled using macro node. Hence, the results highlight that the nonlinear action of beam-column joint has a significant effect on the nonlinear response of a structure.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121518147","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

Analytical Studies on Retrofitted Anchorage System in Concrete using Strut and Tie Method 混凝土加固锚固体系的拉杆法分析研究

Saudi Journal of Civil Engineering Pub Date : 2022-05-07 DOI: 10.36348/sjce.2022.v06i05.001

P. K, S. B.

{"title":"Analytical Studies on Retrofitted Anchorage System in Concrete using Strut and Tie Method","authors":"P. K, S. B.","doi":"10.36348/sjce.2022.v06i05.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i05.001","url":null,"abstract":"Analytical studies were conducted on force transfer mechanism of retrofitted anchorage system in structural concrete by Strut-and-Tie modeling (STM). Post Installation of Headed anchorage (PIHA) as supplementary system introduced for implicit strengthening of anchorage system. The boundaries of STM are considered under direct tension pull-out test. Five different configurations of conventional reinforcement anchorage in concrete with straight bar, 90-degree bend, 180-degree hook, single head and double head bars are retrofitted by using PIHA technique. The mechanics of force transfer in anchorage system was analyzed by STM and validated the results by experimental program. The study parameters considered are (i) location of nodal zone, (ii) strut angle, (iii) size of strut (concrete) contributed during failure. The study variables are (i) configuration of anchorage system (ii) characteristic node formation and (iii) presence of supplementary reinforcement. The result shows good agreement with experimental findings against failure mode, stress pattern, and location of critical zone in conventional and retrofitted anchorage system. Use of this study may further extended to assess theoretical evaluation of failure mode, formation of critical section and stressed regions of discrete RC elements such as corbel projection, bracket connections and beam-column joints.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127935990","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