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Behavior of steel beam section under warping using BIM program 使用 BIM 程序分析翘曲下的钢梁截面行为
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2023.00974
Ammar Jalil Al Mosawi
{"title":"Behavior of steel beam section under warping using BIM program","authors":"Ammar Jalil Al Mosawi","doi":"10.1556/606.2023.00974","DOIUrl":"https://doi.org/10.1556/606.2023.00974","url":null,"abstract":"Warping not only one of the most important phenomena in steel section it is also considered as the most complicated phenomena. Ductility, bearing capacity and serviceability of steel sections may affect by increasing stress concentration of the normal stresses due to warping. In the present work, simulation of steel beam section under effect of warping is studied. Two cantilevers connected to two columns in opposite sides with a middle steel beam-column connection to create different moments on the beam to investigate the behavior of steel section under warping using building information modeling. It is found that the stress strain relationship has four groups depending on the load intensity and the angle of rotation induced due to warping.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"224 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139840621","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
Behavior of steel beam section under warping using BIM program 使用 BIM 程序分析翘曲下的钢梁截面行为
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2023.00974
Ammar Jalil Al Mosawi
{"title":"Behavior of steel beam section under warping using BIM program","authors":"Ammar Jalil Al Mosawi","doi":"10.1556/606.2023.00974","DOIUrl":"https://doi.org/10.1556/606.2023.00974","url":null,"abstract":"Warping not only one of the most important phenomena in steel section it is also considered as the most complicated phenomena. Ductility, bearing capacity and serviceability of steel sections may affect by increasing stress concentration of the normal stresses due to warping. In the present work, simulation of steel beam section under effect of warping is studied. Two cantilevers connected to two columns in opposite sides with a middle steel beam-column connection to create different moments on the beam to investigate the behavior of steel section under warping using building information modeling. It is found that the stress strain relationship has four groups depending on the load intensity and the angle of rotation induced due to warping.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"130 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139780722","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
Enhancing wind power with permanent magnet synchronous generator control strategies 利用永磁同步发电机控制策略提高风力发电能力
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2024.00975
Sabra Ahyaten, Jalal El Bahaoui, Narjisse Amahjour, Francisco Ortegón Gallego, I. Hanafi
{"title":"Enhancing wind power with permanent magnet synchronous generator control strategies","authors":"Sabra Ahyaten, Jalal El Bahaoui, Narjisse Amahjour, Francisco Ortegón Gallego, I. Hanafi","doi":"10.1556/606.2024.00975","DOIUrl":"https://doi.org/10.1556/606.2024.00975","url":null,"abstract":"Due to the substantial rise in wind power generation, the direct-drive permanent magnet synchronous generator has emerged as a leading technology for efficient variable speed operation, meeting grid demands effectively. This paper presents a comparative analysis of control strategies for permanent magnet synchronous generator based wind turbine using real variable wind speed data from a 2 MW of Tetouan wind farm in Morocco. The proposed approach is based on evaluating two primary control strategies: the adaptive fuzzy-proportional-integral controller and the conventional proportional-integral controller aimed at enhancing the wind turbine's output power. The simulation performed on MATLAB-Simulink indicates that pitch control mechanisms play a crucial role in optimizing power generation, also demonstrating its ability to achieve satisfactory performance.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"72 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139840299","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
Experimental investigation of the sonic velocity in historical masonry walls 历史悠久的砖石墙体声速实验研究
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2023.00945
A. Dormany, Z. Orbán
{"title":"Experimental investigation of the sonic velocity in historical masonry walls","authors":"A. Dormany, Z. Orbán","doi":"10.1556/606.2023.00945","DOIUrl":"https://doi.org/10.1556/606.2023.00945","url":null,"abstract":"The structural assessment of historical buildings poses a significant challenge for engineers. However, when it comes to historical structures, more commonly used and reliable destructive testing may not always be viable. Instead, non-destructive testing has gained prominence, encompassing techniques like the Schmidt hammer test, georadar, and sonic-based tests.In this paper, the viability of employing sonic testing on historical masonry structures was investigated. This study involves using the measured sonic velocities to identify voids and solid parts within masonry walls. In addition, the purpose is to determine the compressive strength of both mortar and brick constituents and to analyze the effects of moisture and compressive stress on the propagation velocity of waves.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"55 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139840346","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
Depression depth impact on the stormwater hydrographs from impervious catchment 凹陷深度对不透水集水区雨水水文图的影响
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2024.00987
I. Matlai, Lesya Vovk, V. Zhuk
{"title":"Depression depth impact on the stormwater hydrographs from impervious catchment","authors":"I. Matlai, Lesya Vovk, V. Zhuk","doi":"10.1556/606.2024.00987","DOIUrl":"https://doi.org/10.1556/606.2024.00987","url":null,"abstract":"Method of numerical analysis of the influence of initial depression depth coupled with absolute surface roughness and with Manning's roughness coefficient onto the key hydraulic parameters of the stormwater runoff is proposed. Small highly urbanized catchment with 100% impervious cover was used in stormwater management model numerical simulations for climatic conditions of the Lviv City (Ukraine) at the return period of 1 year. An increase in depression depth from 1 to 5 mm causes reduction in the specific maximum peak runoff from 5.13∙10−3 L/(s∙m2) to 3.29∙10−3 L/(s∙m2), while the critical duration of rainfall increase from 17 min to 56 min. The dimensionless maximum peak flow rate is expressed as a two-parameter exponent function of the initial depression depth, allowing the estimation of the lower limit of this discharge for the practically significant range of the depression depth.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"97 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139781313","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
Impact of wall roughness elements type and height on heat transfer inside a cavity 壁面粗糙度元素类型和高度对空腔内传热的影响
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2024.00986
Issa Omle, A. Askar, Endre Kovács
{"title":"Impact of wall roughness elements type and height on heat transfer inside a cavity","authors":"Issa Omle, A. Askar, Endre Kovács","doi":"10.1556/606.2024.00986","DOIUrl":"https://doi.org/10.1556/606.2024.00986","url":null,"abstract":"This work investigates the effect of two wall roughness types, triangular and circular, on convection and radiation heat transfer in a small space. The ANSYS Fluent is used to do thermal and dynamic modeling; the left wall is warmer than the right one. The upper and lower walls are adiabatic. The Nusselt numbers are compared in all cases and for two Rayleigh values, which change based on the cavity's characteristic length. The results show temperature contours and Nusselt curves. It was observed that the roughness had a strong effect on the air's thermal behavior inside the cavity, where the Nusselt decreased in both roughness cases, especially at small heights. However, the largest decrease is in the triangular case and for angles less than 90°. For 72°, Nusselt is 13.32 and 6% less than smooth and circular cases respectively.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"42 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139781642","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
Depression depth impact on the stormwater hydrographs from impervious catchment 凹陷深度对不透水集水区雨水水文图的影响
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2024.00987
I. Matlai, Lesya Vovk, V. Zhuk
{"title":"Depression depth impact on the stormwater hydrographs from impervious catchment","authors":"I. Matlai, Lesya Vovk, V. Zhuk","doi":"10.1556/606.2024.00987","DOIUrl":"https://doi.org/10.1556/606.2024.00987","url":null,"abstract":"Method of numerical analysis of the influence of initial depression depth coupled with absolute surface roughness and with Manning's roughness coefficient onto the key hydraulic parameters of the stormwater runoff is proposed. Small highly urbanized catchment with 100% impervious cover was used in stormwater management model numerical simulations for climatic conditions of the Lviv City (Ukraine) at the return period of 1 year. An increase in depression depth from 1 to 5 mm causes reduction in the specific maximum peak runoff from 5.13∙10−3 L/(s∙m2) to 3.29∙10−3 L/(s∙m2), while the critical duration of rainfall increase from 17 min to 56 min. The dimensionless maximum peak flow rate is expressed as a two-parameter exponent function of the initial depression depth, allowing the estimation of the lower limit of this discharge for the practically significant range of the depression depth.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"27 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139841100","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
Enhancing wind power with permanent magnet synchronous generator control strategies 利用永磁同步发电机控制策略提高风力发电能力
Pollack Periodica Pub Date : 2024-02-13 DOI: 10.1556/606.2024.00975
Sabra Ahyaten, Jalal El Bahaoui, Narjisse Amahjour, Francisco Ortegón Gallego, I. Hanafi
{"title":"Enhancing wind power with permanent magnet synchronous generator control strategies","authors":"Sabra Ahyaten, Jalal El Bahaoui, Narjisse Amahjour, Francisco Ortegón Gallego, I. Hanafi","doi":"10.1556/606.2024.00975","DOIUrl":"https://doi.org/10.1556/606.2024.00975","url":null,"abstract":"Due to the substantial rise in wind power generation, the direct-drive permanent magnet synchronous generator has emerged as a leading technology for efficient variable speed operation, meeting grid demands effectively. This paper presents a comparative analysis of control strategies for permanent magnet synchronous generator based wind turbine using real variable wind speed data from a 2 MW of Tetouan wind farm in Morocco. The proposed approach is based on evaluating two primary control strategies: the adaptive fuzzy-proportional-integral controller and the conventional proportional-integral controller aimed at enhancing the wind turbine's output power. The simulation performed on MATLAB-Simulink indicates that pitch control mechanisms play a crucial role in optimizing power generation, also demonstrating its ability to achieve satisfactory performance.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"19 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139780423","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
Performance of sugarcane molasses in concrete under hot weather 高温天气下混凝土中甘蔗糖蜜的性能
Pollack Periodica Pub Date : 2024-02-12 DOI: 10.1556/606.2023.00904
Mahdi J. Hussein, Maryam H. Naser, Fatimah H. Naser, A. H. Almamoori, Mohammed L. Hussien
{"title":"Performance of sugarcane molasses in concrete under hot weather","authors":"Mahdi J. Hussein, Maryam H. Naser, Fatimah H. Naser, A. H. Almamoori, Mohammed L. Hussien","doi":"10.1556/606.2023.00904","DOIUrl":"https://doi.org/10.1556/606.2023.00904","url":null,"abstract":"The present research studies the effect of adding sugar factory waste sugarcane molasses as an alternative to chemical inhibitory additives manufactured on concrete cast during hot weather in the summer of Iraq. The current study includes a study of the setting time for cement paste and workability for fresh concrete and some mechanical properties of hardened concrete with sugarcane molasses using percentage 0–0.3% of cement weight. The study also included studying the value of pH of concrete to investigate the effect of sugarcane molasses on reinforced concrete. The results showed that the sugarcane molasses can be used by about 0.1% of cement weight for medium projects and between 0.1 and 0.2% for large projects. It was also found that the compression strength increased by about 11.5% and the indirect tensile strength increased by about 7.5 and 7.4% for splitting and flexural test, respectively for concrete mixtures containing 0.2% of sugarcane molasses.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"177 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139843079","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
Investigation the effect of surface treatment on the mechanical properties of coating 研究表面处理对涂层机械性能的影响
Pollack Periodica Pub Date : 2024-02-12 DOI: 10.1556/606.2024.00955
Salman Khayoon Aldriasawi, Abbas Nasser Hasein, Ashham Muhammed Anead, Barhm Mohamad
{"title":"Investigation the effect of surface treatment on the mechanical properties of coating","authors":"Salman Khayoon Aldriasawi, Abbas Nasser Hasein, Ashham Muhammed Anead, Barhm Mohamad","doi":"10.1556/606.2024.00955","DOIUrl":"https://doi.org/10.1556/606.2024.00955","url":null,"abstract":"The study analyzed surface treatment's impact on mechanical properties of Fe-based amorphous coatings. Specimens underwent six-hour treatments at 670 and 770 °C using vacuum heat. Results revealed distinct mechanical features in the coating: Vickers hardness reached 755, scanning electron microscope images displayed glassy phases, showcasing good wear resistance and compressive residual stresses at around −55 MPa. A remarkable 122% increase in compressive residual stress was noted through combined vacuum heat treatment and sandblasting. Volume wear decreased from the initial 18 to 14 mm3 after treatment at 670 °C followed by sandblasting, indicating a 30% enhancement in wear resistance. Yet, using vacuum heat treatment at 770 °C negatively impacted the coating's properties.","PeriodicalId":35003,"journal":{"name":"Pollack Periodica","volume":"28 38","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139782097","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
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