Journal of the Mechanical Behavior of Materials最新文献_第10页

Structural behavior of tree-like steel columns subjected to combined axial and lateral loads 树状钢柱在轴向和横向组合荷载作用下的结构性能

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0030

Rabab C. Dekhn, K. Shadhan

{"title":"Structural behavior of tree-like steel columns subjected to combined axial and lateral loads","authors":"Rabab C. Dekhn, K. Shadhan","doi":"10.1515/jmbm-2022-0030","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0030","url":null,"abstract":"Abstract Few studies have been conducted on the structural behavior of steel columns with branches that are called tree-like columns. These kinds of columns have been used in many structures around the world. The purpose of this study is to investigate the failure load, vertical and lateral displacement, and failure mode of tree-like columns subjected to a combination of axial and lateral loading. The ratio of lateral load to axial load has been selected as the design variable. A finite element model with one branching level and two branches within the level was first developed using ABAQUS/CAE 2017 software. The model was verified with experimental results. The axial failure load and axial and lateral displacement were determined and compared for different loading ratios. The failure mode was also studied for different loading conditions. The results showed that the axial failure load decreased significantly by 54, 42, and 28% when lateral/axial loading ratio increased by 20, 40, and 60%, respectively. There was no significant decrease when lateral/axial loading ratio was more than 60%, while axial and lateral displacements increased significantly by 24% for each 20% increase in the loading ratio. Local buckling was observed as a failure mode when only gravity load is applied, while combined load resulted in lateral buckling.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"314 - 322"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42606211","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

Calcium carbonate nanoparticles of quail’s egg shells: Synthesis and characterizations 鹌鹑蛋壳的碳酸钙纳米颗粒:合成和表征

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0001

N. Ahmed, Faten Kamil, Adnan Ali Hasso, A. N. Abduljawaad, Thekra Fadel Saleh, S. Mahmood

{"title":"Calcium carbonate nanoparticles of quail’s egg shells: Synthesis and characterizations","authors":"N. Ahmed, Faten Kamil, Adnan Ali Hasso, A. N. Abduljawaad, Thekra Fadel Saleh, S. Mahmood","doi":"10.1515/jmbm-2022-0001","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0001","url":null,"abstract":"Abstract Avian eggshell is a natural biomaterial that has been used as an alternative natural source of CaCO3 and is accessible in big amounts from egg manufacturing. This study was planned to estimate CaCO3 in quail’s eggshell because it has a probable use in the progress of a novel choice of many applications. Physical properties: mineralogical documentation of the natural eggshell nanoparticles were approved using XRD and FTIR to explore the chemical bond or molecular structure of the materials. Micrographs were obtained using FESEM/EDX and TEM to identify the morphology and size of nanoparticles. The results showed that quail eggshell was soft, with white to light sand color, and a smooth texture which allows good deposition of different color spots, from black to brown spots. The resulted of eggshells signifies almost 8.4% w/w of the overall weight (12.2) gram of quail egg and 91.60% w/w of the micropowder to the full weight of (0.94) gram of quail eggshell. The results presented that calcium is the main element in an eggshell; frequently occurs in a formula of CaCO3 and the crystal construction was almost pure calcite. FTIR spectra for quail eggshell demonstrated the existence of the out of plane bending, the asymmetric stretching, and the plane bending styles of the carbonate groups, specific of normal dolomite, situated at 873 cm–1, 1405 cm–1, and 710 cm–1, respectively. The FESEM and TEM for nanoparticles were shown calcite CaCO3 nanoparticles with an ordinary size of ≤ 100 nm for FESEM and with a variety size of ≤ 50 nm for TEM. Unfortunately, eggshell is an egg product manufacturing deposit. These incomes will let fast developments in proportional studies of the organic elements of avian eggshell and their purposeful consequences by usages of eggshell in nourishment and medicine which can be applied for many resolutions that diminish their consequence on environmental contamination.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"1 - 7"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43840309","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: 7

Utilization of serial tendering to reduce the value project 利用连续招标降低项目价值

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0034

Arshed Abbas Mohammed, K. R. Erzaij

引用次数: 1

Response of composite steel-concrete cellular beams of different concrete deck types under harmonic loads 不同混凝土板型钢-混凝土组合孔形梁在谐波荷载作用下的响应

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0014

Zahraa Hussien Dakhela, S. D. Mohammed

{"title":"Response of composite steel-concrete cellular beams of different concrete deck types under harmonic loads","authors":"Zahraa Hussien Dakhela, S. D. Mohammed","doi":"10.1515/jmbm-2022-0014","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0014","url":null,"abstract":"Abstract This study aims to investigate the adequacy of composite cellular beams with lightweight reinforced concrete deck slab as a structural unit for harmonic loaded buildings. The experimental program involved three fixed-ends supported beams throughout 2140 mm. Three concrete types were included: Normal Weight Concrete (NWC), Lightweight Aggregate Concrete (LWAC), and Lightweight Fiber Reinforced Aggregate Concrete (LWACF). The considered frequencies were (5, 10, 15, 20, 25, and 30) Hz. It was indicated that the harmonic load caused a significant influence on LWAC response (64% greater than NWC) and lattice cracks were observed, especially at 30 Hz. As for LWACF slab, no cracks appeared, and the harmonic load had a minor effect on the vibration amplitude. Adding fiber to LWAC improved its behavior and made the amplitude no more than 11.11%, corresponding to NWC. So, the response variance for the LWACF was approximately negligible compared with NWC. It is worth mentioning that the study produced a lightweight structure that resists harmonic vibrations with a small strength reduction by using LWACF as a deck-slab for cellular specimens and provides a structural element with a smaller density of about 27%, which presents an advantage for the cellular beam that is adopted for low-loaded structures.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"127 - 134"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49093609","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

A spherical fuzzy AHP model for contractor assessment during project life cycle 项目全生命周期承包商评价的球面模糊层次分析法

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0042

Hayder Ghazi Abdulkareem, K. R. Erzaij

{"title":"A spherical fuzzy AHP model for contractor assessment during project life cycle","authors":"Hayder Ghazi Abdulkareem, K. R. Erzaij","doi":"10.1515/jmbm-2022-0042","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0042","url":null,"abstract":"Abstract Measurement of construction performance is essential to a clear image of the present situation. This monitoring by the management team is necessary to identify locations where performance is exceptionally excellent or poor and to identify the primary reasons so that the lessons gained may be exported to the firm and its progress strengthened. This research attempts to construct an integrated mathematical model utilizing one of the recent methodologies for dealing with the fuzzy representation of experts’ knowledge and judgment considering hesitancy called spherical fuzzy analytic hierarchy process (SFAHP) method to assess the contractor’s performance per the project performance parameters (cost, schedule, quality, leadership, and change management). At the same time, most project control systems are currently applied through software like Primavera P6 or MS Project. These look at a project’s cost and schedule status by following the earned value analysis for finding the performance. Based on decision makers’ preferences, the analytic hierarchy process (AHP) may be used to arrive at the optimum conclusion. AHP approaches are discussed, including AHP, grey-AHP, fuzzy-AHP, and SFAHP weights comparison. Calculation results showed that the spherical fuzzy approach differs significantly from the other approaches where it considers the decision maker’s hesitation when making linguistic multicriteria decisions and then, as a result, recommends applying periodically for performance measurement. This model can be viewed as a valuable way to help the decision-making stakeholders in the construction sector do the best job about critical issues at a suitable time.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"369 - 380"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46785973","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

Investigation on microstructural features and tensile shear fracture properties of resistance spot welded advanced high strength dual phase steel sheets in lap joint configuration for automotive frame applications 汽车车架搭接结构高级高强度双相钢电阻点焊微结构特征及拉伸剪切断裂性能研究

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0006

C. Rajarajan, P. Sivaraj, Tushar Sonar, S. Raja, N. Mathiazhagan

{"title":"Investigation on microstructural features and tensile shear fracture properties of resistance spot welded advanced high strength dual phase steel sheets in lap joint configuration for automotive frame applications","authors":"C. Rajarajan, P. Sivaraj, Tushar Sonar, S. Raja, N. Mathiazhagan","doi":"10.1515/jmbm-2022-0006","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0006","url":null,"abstract":"Abstract The main objective of this research paper is to study the microstructural features and mechanical properties of resistance spot welded advanced high-strength steel of dual phase grade in lap joint configuration which is mainly employed in sheet form for fabrication of the automotive structure. Resistance spot welding (RSW) being a solid-state welding (SSW) process is used to overcome the problems in fusion welding of AHSS-DP steel such as heat affected zone (HAZ) softening, solidification cracking and distortion which significantly deteriorates the mechanical properties of AHSS-DP800 steel joints. The straight lap (SL-TSFL) and cross lap tensile shear fracture load (CL-TSFL) of spot joints were evaluated. Optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques were used to characterize the weld nugget. The X-ray diffraction (XRD) results are also presented for phase identification in the weld nugget. The fracture surface of failed TSFL specimens was analyzed using SEM. The lap joints made using RSW disclosed superior SL-TSFL, CL-TSFL, and WNZH of 21.7 kN, 17.65 kN, and 589 HV0.5 The superior joint strength and hardness of the weld nugget zone are correlated to the evolution of lath martensite in the nugget zone.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"52 - 63"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46642843","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: 5

Ultimate bearing capacity of eccentrically loaded square footing over geogrid-reinforced cohesive soil 土工格栅加筋粘性土偏心加载方基础极限承载力研究

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0035

Hussam Aldeen J. Hassan, R. R. Shakir

{"title":"Ultimate bearing capacity of eccentrically loaded square footing over geogrid-reinforced cohesive soil","authors":"Hussam Aldeen J. Hassan, R. R. Shakir","doi":"10.1515/jmbm-2022-0035","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0035","url":null,"abstract":"Abstract Construction of shallow foundations on weak cohesive soils have limited load-bearing capacity and excessive vertical displacement. This may cause structural damage and reduce the structure’s durability. Traditionally, weak cohesive soils are excavated and replaced with another stronger material layer, or the foundation is enlarged. These procedures are costly and time-consuming. However, these soils are also difficult to stabilize due to their low permeability and slow consolidation. Therefore, it has become necessary to use geosynthetic material. In this study, a square footing model with an eccentric load was tested in geogrid-reinforced clay. The adopted load eccentricity ratios were 0.05 to 0.1, 0.16, and 0.25. Twenty-one tests were executed to estimate the reinforcement influence and eccentricity on the ultimate bearing capacity (UBC). The geogrid improved the BC by 2.27 and 2.12 times compared to unreinforced soil for centrical and eccentrical loads, respectively. The best first layer ratio and the best number of reinforcements were found to be 0.35 and 4. A new equation for BCR with knowing the number of reinforcing layers was proposed and compared with other studies’ outcomes. It was concluded that the foundation tilts in a linear relationship with eccentricity, with a smaller rate inside the core than outside.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"337 - 344"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45265993","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

Comparison of time extension provisions between the Joint Contracts Tribunal and Iraqi Standard Bidding Document 联合合同法庭和伊拉克标准招标文件延期规定的比较

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0063

Wurood R. Zain-alabdeen, Sawsan M. Rasheed

{"title":"Comparison of time extension provisions between the Joint Contracts Tribunal and Iraqi Standard Bidding Document","authors":"Wurood R. Zain-alabdeen, Sawsan M. Rasheed","doi":"10.1515/jmbm-2022-0063","DOIUrl":"https://doi.org/10.1515/jmbm-2022-0063","url":null,"abstract":"Abstract Many contractors face challenges in completing the project on time due to delays arising for various reasons, including reasons beyond the contractor’s control, such as force majeure, exceptionally bad weather conditions, changes, etc. As a result, contractors submit a time extension claim to make up for lost time and set a later completion date to complete the project. Each contract has its terms for the extension of time (EOT). Therefore, the objective of this article is to study the provisions for extending the time when the reasons are beyond the control of the contractor according to Iraqi Standard Bidding Documents for Procurement of Works (SBDW) and the Joint Contracts Tribunal (SBC/Q 2016). The article also aims to show the extent of the difference between the two contracts in applying these provisions. The study found that when submitting a claim in the Iraqi SBDW, the contractor shall consider the notifications relating to it as per the specified period. Therefore, they will not be considered if claims are submitted after that period. In SBC/Q 2016, submitting a claim notice is not required to gain additional time. Therefore, the failure to provide notice does not forfeit the right to claim additional time. This study enhances the contractor’s knowledge of the terms related to the EOT under the two contracts, reducing the disputes resulting from a misunderstanding of these provisions.","PeriodicalId":17354,"journal":{"name":"Journal of the Mechanical Behavior of Materials","volume":"31 1","pages":"580 - 586"},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41741723","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

Flexural behavior of concrete beams with horizontal and vertical openings reinforced by glass-fiber-reinforced polymer (GFRP) bars 玻璃纤维增强聚合物（GFRP）钢筋加固水平和垂直开口混凝土梁的弯曲性能

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0045

Hasani Ali, A. Said

引用次数: 4

Influences of pre-bending load and corrosion degree of reinforcement on the loading capacity of concrete beams 预弯荷载和钢筋锈蚀程度对混凝土梁承载力的影响

IF 1.8

Journal of the Mechanical Behavior of Materials Pub Date : 2022-01-01 DOI: 10.1515/jmbm-2022-0061

The Truyen Tran, Thúy Minh Trần, X. Nguyen, Duc Hieu Nguyen, BaThao Vu, V. Vo

引用次数: 0