Farklı trafik, zemin, malzeme ve iklim koşulları için mekanistik-ampirik (M-E) yöntemle tasarlanan derzli donatısız rijit üstyapı sistemlerinin karşılaştırılması

Öztürk, Hande İşık; Tan, Emine Bilge; Şengün, Emin; Yaman, İsmail

doi:10.17341/gazimmfd.416536

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Therefore, the okta unit should be converted into percent and the cloud percentage cover should be changed to sunshine percentage. And finally, the collected local climate data should be converted to the MEPDG format (text file in ".hcd" extension) because the climate data has not been yet developed in the MEPDG format for all parts of Turkey [22]. Each climatic file consists of date (YYYY/mm/dd/hr), air temperature (°C), precipitation (mm), wind speed (m/hr), cloud cover (%), and humidity (%) which is shown in Figure . 3.…”

Section: Discussionmentioning

confidence: 99%

Data Collection for Implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG) in Izmir, Turkey

Shakhan¹,

Topal

Şengöz

2021

Teknik Dergi

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Developing countries like Turkey are trying to implement the Mechanistic-Empirical Pavement Design Guide (MEPDG). The implementation of this method requires comprehensive local data collection, evaluation, and, if necessary, a local calibration. The objective of this study is to prepare local data such as climate, traffic, and materials for evaluation and local calibration of MEPDG for Izmir City. For this purpose, the climate and traffic data were obtained, analysed, and converted to the MEPDG format. Besides, the bound and unbound pavement material properties were determined. Since some of the obtained local data like climate, vehicle classification, traffic growth factor, and axle load distribution cannot be directly used as design inputs, they were developed and converted to a suitable format to be used in the MEPDG. The output of this study can be used as design inputs for the evaluation and local calibration the MEPDG in Izmir and serves as a guide for data preparation for other parts of the country.

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Section: Discussionmentioning

confidence: 99%

Data Collection for Implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG) in Izmir, Turkey

Shakhan¹,

Topal

Şengöz

2021

Teknik Dergi

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“…In the Izmir (city in Turkey) study [15], the focus was the data collection to implement the M-E design, but no runs were performed. In the only study performing the M-E based rigid pavement designs [16], 8 cities were studied individually by simply matching them with the selected US city/weather stations.…”

Section: Determination Of Climatic Regions For the M-e Pavement Design In Turkeymentioning

confidence: 99%

“…In the case of Turkey, Shakhan et al [15] focused on the data collection needs for pavement design in the city of Izmir, Turkey, but, it fell short in creating any specific design. Ozturk et al [16] is the only study to use the M-E method for rigid pavement design for 8 different cities in Turkey. This follow-up study aimed to support the discussion of the challenges and benefits of switching to the M-E method for flexible pavement design.…”

Section: Introductionmentioning

confidence: 99%

“…AASHTOWare Pavement software Version 2.2 (AASHTOWare in short) was used to determine the optimum design thicknesses by iteratively varying these thicknesses to meet the target levels of distresses at the end of the life of the pavement. Following the research methodology for the rigid pavement design using the M-E design in [16], this study first charted the effect of selected design factors on flexible pavement thickness (thus, ultimately the cost of it indirectly). Secondly, the evaluation of selected designs by AASHTO'93 in the AASHTOWare enabled the quantification of benefits of the latter using some pavement performance criteria, as well.…”

Section: Introductionmentioning

confidence: 99%

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Challenges and Benefits of the Use of AASHTOWare for 3 Climatic Regions in Turkey

2022

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The economic growth in developing countries triggers investments in highway networks. Thus, this requires a re-evaluation of existing design practices, which are mostly empirical. An alternative is the relatively recently developed Mechanistic-Empirical (M-E) design method. It has major data challenges and must be identified before a major switch. In this study, three different climatic regions for Turkey were analyzed optimizing 162 design combinations. Results showed that climate, traffic, and reliability parameters extremely affect the performance of the pavement. As in the current practice of Turkey, climate and material effects are not currently considered; these should be further studied considering the local calibration steps.

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Impact of Subgrade Strength on Pavement Performance

Shakhan¹,

Topal

Şengöz

2022

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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Based on the standard design of flexible pavement structure conducted in Turkey, only subbase course layer is affected by the variation of subgrade strength and other pavement layers (wearing course, binder course, asphalt concrete (AC) base course, and crushed stone base course) are not influenced by the variation of subgrade strength. Therefore, the aim of this study is to investigate the impact of subgrade strength on flexible pavement distresses. To achieve the objectives, firstly, three different flexible pavement structures designed using the Turkish Flexible Pavement Design Guide 2008 were chosen and secondly, the effect of variation of subgrade strength [5 to 50 California Breading Ratio (CBR)] on pavement performance (rutting and fatigue cracking) for three different traffic levels [5000, 10000, and 15000 average annual daily truck traffic (AADTT)] for climatic condition of Izmir region using AASHTOWare Pavement ME Design v2.5.5 were analyzed. The results of the study show that, reducing subgrade CBR values from 50 to 5 CBR resulted in an increase by 3.7mm in total rutting depth and 5.6% in alligator cracking magnitude. Also, results demonstrated that the influence of subgrade strength on rutting within asphalt concrete layers (AC rutting) is negligible. By contrast, increasing subgrade CBR value from 5 to 50 resulted in a significant increase (65.1 to 314.7 m/km) in longitudinal cracking magnitude while thermal (transverse) cracking is not sensitive to the variation of subgrade CBR values. This study can assist highway agencies and individual pavement designers in the design a more practical pavement.

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Farklı trafik, zemin, malzeme ve iklim koşulları için mekanistik-ampirik (M-E) yöntemle tasarlanan derzli donatısız rijit üstyapı sistemlerinin karşılaştırılması

Abstract: The differences between Mechanistic-Empirical design and AASHTO 1993  The effects of climate on the concrete slab thickness and joint spacing of JPCP  The effects of concrete material properties on the pavement design Comparison of targeted and estimated performance criteria

Cited by 4 publications

References 6 publications

Data Collection for Implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG) in Izmir, Turkey

Data Collection for Implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG) in Izmir, Turkey

Challenges and Benefits of the Use of AASHTOWare for 3 Climatic Regions in Turkey

Impact of Subgrade Strength on Pavement Performance

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