VERIFICATION OF A THREE DIMENSIONAL NUMERICAL MODEL FOR A MECHANICALLY STABILIZED EARTH WALL
Tahsin, A., El-Sherbiny, R., Salem, A. (2020). VERIFICATION OF A THREE DIMENSIONAL NUMERICAL MODEL FOR A MECHANICALLY STABILIZED EARTH WALL. EKB Journal Management System, 15(55), 513-526. doi: 10.21608/auej.2020.87862
Abdelwahab Tahsin; Rami El-Sherbiny; Abdelsalam Salem. "VERIFICATION OF A THREE DIMENSIONAL NUMERICAL MODEL FOR A MECHANICALLY STABILIZED EARTH WALL". EKB Journal Management System, 15, 55, 2020, 513-526. doi: 10.21608/auej.2020.87862
Tahsin, A., El-Sherbiny, R., Salem, A. (2020). 'VERIFICATION OF A THREE DIMENSIONAL NUMERICAL MODEL FOR A MECHANICALLY STABILIZED EARTH WALL', EKB Journal Management System, 15(55), pp. 513-526. doi: 10.21608/auej.2020.87862
Tahsin, A., El-Sherbiny, R., Salem, A. VERIFICATION OF A THREE DIMENSIONAL NUMERICAL MODEL FOR A MECHANICALLY STABILIZED EARTH WALL. EKB Journal Management System, 2020; 15(55): 513-526. doi: 10.21608/auej.2020.87862

VERIFICATION OF A THREE DIMENSIONAL NUMERICAL MODEL FOR A MECHANICALLY STABILIZED EARTH WALL

Journal of Al-Azhar University Engineering Sector
Article 12, Volume 15, Issue 55, April 2020, Page 513-526  XML PDF (535.46 K)
Document Type: Original Article
DOI: 10.21608/auej.2020.87862
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Authors
Abdelwahab Tahsin1; Rami El-Sherbiny2; Abdelsalam Salem2
1Arab Consulting Engineers Office, Dokki, , Giza, Egypt
2Geotechnical and Foundations Engineering, Department of Public Works, Faculty of Engineering, Cairo University, Giza, Egypt
Abstract
In comparison to traditional retaining wall systems, Mechanically Stabilized Earth Walls(MSEW) provide advantages of cost savings, relatively easy and fast construction, and good performance withregard to differential settlements.Behavior of MSEW is complicated due to the mechanical complexity of the component materials, interactions, and unquantifiable effects of construction method. Current design standards are based primarily on understanding of two-dimensional plane-strain behavior regardless of the 3D behavior and associated mechanisms. The objective of this research is to develop and verify a 3D numerical model that can be later adopted for studying the 3D behaviour of MSEWs of different geometries usingPLAXIS 3D. The numerical modelwas verified against the monitoring records of Wall 1 reported by Hatami & Bathurst (2005) at the Royal Military College of Canada.The model verification shows that the modeling technique used in Plaxis 3D is capable of capturing qualitative trends of the instrumented MSEW response, and in most cases quantitative values are in agreement with the monitoring records and predictions by Hatami and Bathurst (2005, 2006). Hardening Soil (HS) constitutive model would better simulate the stress- strain relationship for sand derived/ calibrated from tri-axial test. The linear Elasto-Plastic anisotropic geogrid model with secant modulus at 1.5% strain is found appropriate. Plate elementsused to model the facing are found suitable to simulate discrete facing blocks, as an alternative to solid elements to reduce complexity of the model and computation time.

 
 

أصبح استخدام نظام الحوائط السانده من التربه المسلحه بالبوليمرات واسع الانتشار نظرا لفوائده الاقتصاديه بالضافه الي سهوله وسرعه التنفيذ. تعتبر اساليب التحليل العددي ثلاثي الابعاد وسيله فعاله لدراسه السلوک المعقد لتلک الحوائط والتمثيل الدقيق للتأثير التفاعلي بين مکونات نظام الحائط من تربه وشبک تسليح وبلوکات وجه الحائط وبالتالي تم تصميم نموذج تحليل عددي ثلاثي الابعاد باستخدام طريقة العناصر المحدودة عن طريق برنامج متخصص في التحليل الجيوتقني (بلاکسيس) لتمثيل سلوک تلک الحوائط مع استخدام نموذج محاکاه غير خطي لتمثيل التاثير التفاعلي بين التربه والحائط.وقد تم عمل تحقيق لنموذج التحليل ثلاثي الابعاد بالرجوع الي قياسات الرصد الحقلي الخاصه بحائط الکليه الملکيه الکنديه تم رصده عن طريق هاتامي وباثرست عام |(2005و2006) .وتبين حدوث توافق بدرجه مقبوله بين نتائج الرصد الحقلي وبين ما تم حسابه بنموذج المحاکاه. 


 
Keywords
Mechanically Stabilized Earth (MSE) Wall; 3D Numerical Modeling; Plaxis, Hardening Soil Model, Strain; Strain Gauge; Verification; Secant Modulus; Finite Element Method, Constant Strain Rate Test. حوائط التربة المسلحة ، البوليمرات ، مصنعات جيوتقنيه للتربة ، أزاحه واجهة الحائط ، التحليل العددي ثلاث
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