فهرس المقالات PLAXIS 3D حرية الوصول المقاله صفحة الملخص نص كامل 1 - Estimation of Equivalent Stiffness of Pile Groups in Piled Raft Foundations Using Numerical Methods and Introduction of a Transfer Approach to Structural Modeling in SAFE Ali Mahdizadeh MAHDI MOMENI REGHABADI ramin tabatabai