ارزيابي عددي توزيع تنش بر روي سپر حائل طره‌اي مدفون در خاك دانه‌اي براي شرايط زمين لرزه

Numerical Evaluation of Stress Distribution on the Cantilever Sheet Pile Wall Buried in Earthquake Conditions

تاكنون بيشتر روش‌هاي كاربردي جهت تعيين چگونگي توزيع تنش‌هاي جانبي حاصل از نيروهاي لرزه‌اي براساس فرضيات ساده‌كننده رانكين و كولمب مطرح شده‌اند. در طي ساليان اخير ارائه تئوري وانگ براي ديوارهاي حائل با خاكريز فعال، محققين را بر آن داشت تا در مورد نوع خاكريز مقاوم آن و بررسي حالت لرزه‌اي اين تئوري براي ديوارهاي حائل تلاش‌هايي صرف نمايند .در اين مقاله تلاش مي‌شود تا تئوري وانگ براي بررسي توزيع فشار جانبي خالص بر روي سپر بدون مهار جانبي نيز بكار بسته شود. لذا مطابق اين تئوري، دانستن نحوه تشكيل سطوح گسيختگي در خاك‌هاي لايه‌اي و در مناطق فعال و مقاوم اهميت پيدا مي‌كند. همچنين سعي شده تا توزيع فشار جانبي تحت تأثير پارامترهاي مختلف مكانيكي خاكريز پشت سپر مورد بررسي قرار گيرد. در ادامه محل اثر برآيند نيروهاي جانبي حاصل از اين تئوري محاسبه و نشان داده مي‌شود كه مقدار برآيند وابسته به ضريب جانبي فشار k (مورد استفاده در تئوري وانگ) نمي‌باشد، عليرغم اينكه توزيع فشار جانبي بر روي سپر با تغيير پارامتر k تفاوت مي‌كند. البته محل اثر برآيند نيروهاي جانبي وارد بر سپر با تغيير توزيع فشار جابجا مي‌شود ولي مقدار برآيند آن در مقايسه با روش كولمب يكسان باقي مي‌ماند. در نتيجه اين بحث مي‌توان گفت كه تعميم تئوري وانگ در بررسي توزيع فشار لرزه‌اي بر روي سپرهاي بدون مهار جانبي نيز به‌خوبي جواب مي‌دهد و مي‌توان از آن به‌عنوان يك روش جديد محاسباتي در تحليل و طراحي سپرها استفاده نمود.

Analysis and design cantilever sheet pile walls with general Rankin and Coloumb Methods is done, until now. During recent years offer Wang theory’s for retaining wall with active backfill, researchers attempt to about type passive backfill its and scrutiny seismic condition this theory for retaining wall. In this paper is tried Wang theory’s toward the searching distribution of net lateral earth pressure on cantilever sheet pile wall, also is employed. Therefore within this theory it is considered stable coefficient and calculation was established on the basis of the trapezoid shaped wedges is right around the cantilever sheet pile, However, the resultant effect of lateral forces acting on sheet pile is moved by changing the pressure distribution in comparison, but the outcome is the same and constant like Coulomb's theory. Therefore, it can be argued that Wang's theory provided the pressure distribution on sheet pile walls is well answered and can be used as a new method of calculation in the analysis and design of this retaining structure.Analysis and design cantilever sheet pile walls with general Rankin and Coloumb Methods is done, until now. During recent years offer Wang theory’s for retaining wall with active backfill, researchers attempt to about type passive backfill its and scrutiny seismic condition this theory for retaining wall. In this paper is tried Wang theory’s toward the searching distribution of net lateral earth pressure on cantilever sheet pile wall, also is employed. Therefore within this theory it is considered stable coefficient and calculation was established on the basis of the trapezoid shaped wedges is right around the cantilever sheet pile, However, the resultant effect of lateral forces acting on sheet pile is moved by changing the pressure distribution in comparison, but the outcome is the same and constant like Coulomb's theory. Therefore, it can be argued that Wang's theory provided the pressure distribution on sheet pile walls is well answered and can be used as a new method of calculation in the analysis and design of this retaining structure. Analysis and design cantilever sheet pile walls with general Rankin and Coloumb Methods is done, until now. During recent years offer Wang theory’s for retaining wall with active backfill, researchers attempt to about type passive backfill its and scrutiny seismic condition this theory for retaining wall. In this paper is tried Wang theory’s toward the searching distribution of net lateral earth pressure on cantilever sheet pile wall, also is employed. Therefore within this theory it is considered stable coefficient and calculation was established on the basis of the trapezoid shaped wedges is right around the cantilever sheet pile, However, the resultant effect of lateral forces acting on sheet pile is moved by changing the pressure distribution in comparison, but the outcome is the same and constant like Coulomb's theory. Therefore, it can be argued that Wang's theory provided the pressure distribution on sheet pile walls is well answered and can be used as a new method of calculation in the analysis and design