Teknik Dergi最新文献_第7页

Akifer Parametrelerinin Optimizasyon Tabanlı Bir Eğri Çakıştırma Yaklaşımı Kullanılarak Belirlenmesi Akifer Parametrelerinin Optimizasyon TabanlıBir EğriÇakıştırma YaklaşımıKullakılarak Belillenmesi

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-09-01 DOI: 10.18400/tekderg.536342

M. Ayvaz, Gurhan Gurarslan

引用次数: 0

Mekanistik-Ampirik ve Geleneksel Beton Yol Tasarım Yöntemlerinin Karşılaştırılması: Afyon-Emirdağ Deneme Kesimi 机械Ampiric和高级Beton设计方法的比较：Afyon发射率测试分辨率

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-09-01 DOI: 10.18400/tekderg.565709

Emin Şengün, Hande Isik Ozturk, İ. Yaman

引用次数: 3

Prefabrike Yapıların Tasarım, Üretim, Depolama, Nakliye Ve Yapım Süreçlerini Etkileyen Kriterler

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-08-17 DOI: 10.18400/tekderg.647272

İlhami Ay, Gülden Gümüşburun Ayalp

引用次数: 5

Large Scale Direct Shear Box Tests on Gravels 砾石的大型直剪箱试验

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-08-17 DOI: 10.18400/tekderg.606816

A. A. Yunatci, K. Cetin

引用次数: 1

Analysis of a Prefabricated Vertical Drain (PVD) Soil Improvement Project 某装配式垂直排水沟（PVD）土壤改良工程分析

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-08-17 DOI: 10.18400/tekderg.641218

A. Mert, Akın Önalp, E. Arel

{"title":"Analysis of a Prefabricated Vertical Drain (PVD) Soil Improvement Project","authors":"A. Mert, Akın Önalp, E. Arel","doi":"10.18400/tekderg.641218","DOIUrl":"https://doi.org/10.18400/tekderg.641218","url":null,"abstract":"A settlement analysis has been carried out for several sectors of a rail station yard improved with prefabricated vertical drains (PVD) in Istanbul, that exhibited prolonged consolidation beyond the predicted values in certain sectors of the treated zone. Final settlement and End of Primary (EOP) settlement times have been estimated theoretically as well as using the Asaoka graphical procedure. The compliance of settlement-time curves with in-situ measurements and Asaoka solution has been investigated. A geotechnical model was developed for finite element and three-dimensional consolidation analyses. The settlement curves obtained by varying horizontal-vertical permeability coefficient ratio ( k h / k v ) and insitu measurements have been compared, and k h / k v values corresponding to 90% degree of consolidation has been computed for all sectors. The effect of drain spacing ( s drain ) as well as drain length ( L drain ) on the rate of consolidation have been evaluated for each sector, keeping the specified ratios constant. The times corresponding to 95% degree of consolidation ( t 95 ) have been calculated using the theoretical solution and compared to in-situ measurements. Calculated t 95 ’s has also been compared to their estimated values by varying the spacing ( s drain ) and the length (L drain ). Additionally, the required intervals of s drain and L drain have been obtained corresponding to the calculated t 95 times. The analyses suggest that the main reason for prolonged consolidation was the horizontal to vertical permeability coefficient ratio. According to the analysis results, PVD implementation was not efficient in clays having k h / k v of approximately unity. The main conclusion of this study was to discover the necessity for optimizing the variables in any such project. The efficacy of the works can be significantly enhanced if simultaneous evaluation of the parameters s drain and L drain and the permeability ratio k h / k v is carried out prior to field work. Otherwise, “accidents” may emerge as found out in this project.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46024339","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: 1

Lightweight Cement-Based Composites Incorporating Hollow Glass Microspheres: Fresh and Hardened State Properties 含中空玻璃微球的轻质水泥基复合材料:新鲜和硬化状态特性

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-08-17 DOI: 10.18400/tekderg.677447

Nihat Kabay, Ahmet B. Kizilkanat, Busra Akturk, Yusuf Kahraman

{"title":"Lightweight Cement-Based Composites Incorporating Hollow Glass Microspheres: Fresh and Hardened State Properties","authors":"Nihat Kabay, Ahmet B. Kizilkanat, Busra Akturk, Yusuf Kahraman","doi":"10.18400/tekderg.677447","DOIUrl":"https://doi.org/10.18400/tekderg.677447","url":null,"abstract":"This research aims to develop a lightweight cementitious composite with satisfying mechanical and good thermal insulating properties. Two different types of hollow glass microspheres (HGM) were used as lightweight aggregates and were substituted with fine aggregate by 10, 20, and 40% by volume. The rheological, physical, mechanical, and microstructural properties of the resulting HGM-incorporated composites were investigated and correlations were established between physical and mechanical test results. The results showed that the physical and mechanical properties of individual HGM particles play a dominant role in the properties of lightweight mortars. HGM addition provided reductions up to 20% in the density and 45% in the thermal conductivity values of mortars compared to the reference. The best HGM ratio in the tested range was found as 20%, which provides benefits such as reduced density and enhanced thermal insulation capability without causing a significant reduction in compressive strength. It was concluded that HGMs can be used in the lightweight cementitious mortar production which has great potential in building applications to reduce the heating energy consumption.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45110232","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: 3

Assessment of the Disaster Recovery Progress through Mathematical Modelling 通过数学模型评估灾后恢复进展

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-07-01 DOI: 10.18400/tekderg.473099

S. Ü. Dikmen, R. Akbiyikli, M. Sönmez

引用次数: 3

Modeling Pavement Performance Based on LTPP Database for Flexible Pavements 基于LTPP数据库的柔性路面路面性能建模

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-07-01 DOI: 10.18400/tekderg.476606

M. Radwan, M. Abo-Hashema, Hamdy Faheem, M. Hashem

{"title":"Modeling Pavement Performance Based on LTPP Database for Flexible Pavements","authors":"M. Radwan, M. Abo-Hashema, Hamdy Faheem, M. Hashem","doi":"10.18400/tekderg.476606","DOIUrl":"https://doi.org/10.18400/tekderg.476606","url":null,"abstract":"In many countries, incredible investments have been made in constructing roads that require conducting periodic evaluation and timely maintenance and rehabilitation (M&R) plan to keep the network operating under acceptable level of service. The timely M&R plan necessitates accurately predicting pavement performance, which is an essential element of road infrastructure asset management systems or Pavement Management Systems (PMS). Consequently, there is always a need to develop and to update performance prediction models embedded in PMS applications. This study focuses in developing distress prediction models for flexible pavements located in non-freeze climatic zone, which represent most of developing countries such as Egypt, using data extracted from the Long-Term Pavement Performance (LTPP) program. Ten distress performance prediction models were developed in this study for both wet- and dry-non freeze climatic zones, which are alligator (Fatigue) cracking, longitudinal cracking, transverse cracking, ravelling, bleeding, and rut depth models. These models can play an important role assisting decision makers in predicting pavement performance, identifying M&R needs, rational budget planning and resource allocation.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":"31 1","pages":"10127-10146"},"PeriodicalIF":1.3,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43045828","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: 6

Credit Success Rates of Certified Green Buildings in Turkey 土耳其认证绿色建筑的信用成功率

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-07-01 DOI: 10.18400/tekderg.449251

V. Toğan, X. Thomollari

引用次数: 4

Artificial Neural Network Model to Predict Anchored-Pile-Wall Displacements on Istanbul Greywackes 人工神经网络模型预测伊斯坦布尔灰线桩墙锚固位移

IF 1.3 4区工程技术

Teknik Dergi Pub Date : 2020-07-01 DOI: 10.18400/tekderg.492280

Özgür Yıldız, M. Berilgen

{"title":"Artificial Neural Network Model to Predict Anchored-Pile-Wall Displacements on Istanbul Greywackes","authors":"Özgür Yıldız, M. Berilgen","doi":"10.18400/tekderg.492280","DOIUrl":"https://doi.org/10.18400/tekderg.492280","url":null,"abstract":"Istanbul's main lithological unit is a greywacke formation locally known as the Trakya Formation. It is weathered and extensively fractured, and the stress relief induced by deep excavations causes excessive displacements in the horizontal direction. Therefore, predicting excavation-induced wall displacements is critical for avoiding damages. The aim of this study is to develop an Artificial Neural Network (ANN) model to predict anchored-pile-wall displacements at different stages of excavations performed on Istanbul's greywacke formations. A database was created on excavation and monitoring data from 11 individual projects in Istanbul. Five variables were used as input parameters, namely, excavation depth, maximum ground settlement measured behind the wall, system stiffness, standard penetration test N value of the soil depth, and index-of-observation point. The proposed model was trained, validated, and tested. Finally, two distinct projects were numerically modeled by applying the finite element method (FEM) and then used to examine the performance of the ANN model. The displacements predicted by the ANN model were compared with both the computed values obtained from the FEM analysis and actual measured displacements. The proposed ANN model accurately predicted the displacement of anchored pile walls constructed on Istanbul's greywackes at different excavation stages.","PeriodicalId":49442,"journal":{"name":"Teknik Dergi","volume":"31 1","pages":"10147-10166"},"PeriodicalIF":1.3,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46195024","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: 4