Teknik Dergi最新文献_第5页

Damage Identification Analyses of a Historic Masonry Structure in T-F Domain 某历史砖石结构T-F区损伤识别分析

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2021-03-01 DOI: 10.18400/tekderg.426728

K. Beyen

{"title":"Damage Identification Analyses of a Historic Masonry Structure in T-F Domain","authors":"K. Beyen","doi":"10.18400/tekderg.426728","DOIUrl":"https://doi.org/10.18400/tekderg.426728","url":null,"abstract":"Fatih mosque, a landmark structure in Istanbul, has suffered structural damage during 1999 Kocaeli earthquake. Using spectral, time-domain (OKID/ERA for SISO and MIMO models) and T-F domain ( WT, HHT ) techniques on ambient vibrations, damage identification has been performed. Results of parametric and spectral analyses indicate close global peaks. Northwest arch ( O 3 ) that was expected to move in harmony with other arches cannot display such a consistent behavior and produces additional local frequency at 24Hz due to disintegrated stones around the crown. Southeast arch ( O 1 ) also has comparable damage producing another locality at 38Hz. Extending linear approaches into nonl inear-nonstationary methods, WT and HHT improved the results in the temporal-frequency energy distribution. Estimated individual and global structural behavior are consistent with visually inspected damage states for O 3 and O 1 . On a global scale, damage additionally generates significant nonstationarity. D ecompositions in WT and HHT show the capability of identifying nonlinear-nonstationary process hidden in the data. T-F analysis detects and localizes any anomalous system behavior and can adequately capture the dynamical behavior of damage in any instrumented part of the structure at any particular time epoch. For historical masonry structures with vulnerable components like large central dome and arches that have low redundancy, there is a need to develop automatic signal/image processing through image processing, machine vision, and pattern recognition for early diagnosis and prognosis for warning of gradually emerging structural degradations.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43284801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

DBYBHY-2007 ve TBDY-2018 Esas Alınarak Boyutlandırılan MÇÇÇ’lerin Deprem Performanslarının Karşılaştırılması DBYBHY-2007和TBDY-2018通过基底凹陷性能测量的测量值比较

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2021-01-01 DOI: 10.18400/tekderg.620816

Mehmet Bakır Bozkurt, Barış Serin

引用次数: 2

Corrosion Behavior of Rebars Embedded in Alkali-Activated and Conventional Reactive Powder Concretes 碱活性和常规活性粉末混凝土中钢筋的腐蚀行为

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.478154

Hüseyin Yiğiter, A. Beglarigale, S. Aydın, B. Baradan

引用次数: 1

Effect of Modeling Beam-Column Joints on Performance Assessment of Columns in Non-Ductile RC Frames 梁柱节点建模对非延性钢筋混凝土框架柱性能评估的影响

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.456752

S. C. Girgin

引用次数: 1

Corrosion and Chloride Diffusivity of Reinforced Concrete Cracked under Sustained Flexure 钢筋混凝土在持续弯曲下的腐蚀与氯离子扩散

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.430536

N. Ozyurt, T. A. Söylev, T. Özturan, A. Pehlivan, A. Niş

引用次数: 5

Lightweight Cellular Hollow Concrete Blocks Containing Volcanic Tuff Powder, Expanded Clay and Diatomite for Non-Load Bearing Walls 非承重墙用含火山凝灰岩粉、膨胀粘土和硅藻土的轻质蜂窝空心混凝土砌块

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.426034

L. Gündüz, Şevket Onur Kalkan

{"title":"Lightweight Cellular Hollow Concrete Blocks Containing Volcanic Tuff Powder, Expanded Clay and Diatomite for Non-Load Bearing Walls","authors":"L. Gündüz, Şevket Onur Kalkan","doi":"10.18400/tekderg.426034","DOIUrl":"https://doi.org/10.18400/tekderg.426034","url":null,"abstract":"Lightweight cellular hollow concrete (LCHC) block is a type of masonry unit manufactured by precast technique. LCHC block is produced by the mixing of Portland cement, volcanic tuff powder, expanded clay aggregate and diatomite for building applications. LCHC blocks are lightweight and being frequent cellular hollow cleavages, give excellent thermal and acoustic performance, fire resistance and high weathering resistance to the buildings. In this research work, LCHC blocks with 28 different mixture batches were cast into a mould with vibro-compacting, de-moulded immediately and transferred to a storage area for curing up to 120 days in normal air condition. Totally 21 cellular space with 10 mm in width were placed in the block design. For each mixture, twenty four block samples were prepared and tested in the air dry condition for compressive strength and water absorption in accordance with BS 1881: Part 116. This paper initially examines how volcanic tuff powder affect the characteristics of lightweight concrete masonry mixtures and also investigates the use of quartet blends containing volcanic tuff powder, expanded clay aggregate, diatomite and cement to produce LCHC blocks for walls and partitions.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46291140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Improvement on Flexural Performance of UHPFRC with Hybrid Steel Fiber 混杂钢纤维对UHPFRC抗弯性能的改善

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.485565

A. Yavas, Tamer Birol, Kaan Türker, Umut Hasgül, Halit Yazici

引用次数: 4

Experimental Investigation of Using Sandwich Panels as Infill Plate in a Steel Plate Shear Wall 夹芯板作为钢板剪力墙填充板的试验研究

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.559036

S. Dusak, C. Yalçın, A. N. Yelgin

{"title":"Experimental Investigation of Using Sandwich Panels as Infill Plate in a Steel Plate Shear Wall","authors":"S. Dusak, C. Yalçın, A. N. Yelgin","doi":"10.18400/tekderg.559036","DOIUrl":"https://doi.org/10.18400/tekderg.559036","url":null,"abstract":"A total of five specimens were designed to investigate the cyclic behavior of infill panels made from various materials such as thin-walled steel sheets and corrugated sandwich panels. First, two specimens were prepared to act as shear walls by connecting sandwich panels, which are normally used as architectural partition walls in steel buildings, to a steel frame using appropriate connections. Then, a specimen with a single steel plate was designed. The final specimen was prepared by removing the polyurethane material from inside the sandwich panel and only steel plates were attached to both faces of the frame. This way, it was possible to examine the effect of the polyurethane material inside the sandwich panel and the corrugated steel plate on system behavior. Finally, a bare frame was prepared as a control specimen. For this experimental study, single-story, single-bay steel frames of semi-rigid beam to column connections were prepared with a scale ratio of 1:3. In all specimens, the infill plates were fastened to the frame connection profiles using self-drilling screws and the prepared specimens were compared in terms of their maximum load capacity, initial stiffness, ductility and energy dissipation capacity values under cyclic loading. The experimental and analytical investigations showed that, like steel plate infills, the specimens with sandwich panels also behaved in a ductile manner with relatively lower load and energy dissipation capacity. The results of the computer model analyses were then compared with the experimental results and they were found to be compatible with the analytical results.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48104469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Evaluation of Glass Granule Size Effect on Water Damage Performance in Asphalt Mixtures 玻璃颗粒尺寸对沥青混合料水损伤性能影响的评价

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-11-01 DOI: 10.18400/tekderg.504698

E. Iskender, A. Sayin, A. Aksoy, Cansu Iskender

{"title":"Evaluation of Glass Granule Size Effect on Water Damage Performance in Asphalt Mixtures","authors":"E. Iskender, A. Sayin, A. Aksoy, Cansu Iskender","doi":"10.18400/tekderg.504698","DOIUrl":"https://doi.org/10.18400/tekderg.504698","url":null,"abstract":"Economic growth and the increase in the population trigger consumption and increase the amount of waste produced. One of the resulting wastes is glass and using of these large amount of glass waste materials by environmental methods is seen as an important issue. On the other hand, there are difficulties due to the decrease of natural resources in the supply of aggregates used in asphalt pavements. In this study, the use of waste glass instead of natural aggregates in asphalt pavements was investigated in terms of water damage. In addition to base bitumen, hydrated lime modified and SBS modified bitumen were used in experimental studies. The waste glass was added in two different sizes (as filler materials and 2 mm sized fine aggregate) and three addition ratios (20%, 30% and 40%) instead of basalt aggregates. The asphalt mix samples produced in optimum bitumen contents were evaluated for water damage by AASHTO T 283 method. Asphalt mixture with 20% glass filler showed the highest water damage resistance. Among the options where the glass aggregate size was chosen as 2 mm, the highest water damage resistance was realized at addition rate of 30%. Both hydrated lime and SBS polymer were effective in improving water damage resistance. However, the highest tensile strength ratio was obtained with hydrated lime. The optimum bitumen contents of the mixtures with glass aggregates produced with both base and modified bitumen were decreased compared to that produced entirely with basalt aggregate. According to the test results, it is understood that the filler materials produced from waste glasses can be used instead of natural aggregate filler.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48866069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Türk Deprem Yönetmeliklerinin (DBYBHY ve TBDY) Sismik İzolatör Tasarımı Özelinde Karşılaştırılması 详细比较土耳其地震管理系统隔振器设计（DBYBHY和TBDY）

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-10-02 DOI: 10.18400/tekderg.713068

Hicran Erdoğdu, Esengül Çavdar, Gökhan Özdemir

引用次数: 0