نوع مقاله : پژوهشی
دانشکده مهندسی عمران - دانشگاه تربیت مدرس
عنوان مقاله [English]
The supremacy of reinforced soil walls in easy installation, flexibility and economical aspects in comparison with other stabilization technics has caused the widespread use of these structures. Observation of these walls during the earthquakes and also the experimental studies have shown their appropriate behavior and flexibility. Since these walls have adaptable flexibility, using them in seismic areas has widely developed. Therefore recognition of the seismic behavior of these structures is mandatory. The high costs and needed time of dynamic analysis based on Time-History analysis has caused that pseudo static method become more desirable in spite of lacking suitable accuracy.
Independency of pseudo static analysis to effective parameters on seismic behavior of structures, and ignoring dynamic loading characteristics, are some of the deficiencies of this method.
The current study, by finite difference numerical modeling, tries to suggest a
design method based on displacement. In this case, loading characteristics,
such as magnitude, frequency, peak ground acceleration and geometrical
characteristics of reinforced soil structure are considered to correct the
pseudo static method and finally introduce the pseudo static coefficient as a
function of seismic performance level and peak ground acceleration.
In addition, the authors have tried to simply suggest the equivalent harmonic
load of selected acceleration records. Considering the loading parameters,
mechanically stabilized earth wall parameters and type of the site have caused
that the used method in this study leads to most efficient design in comparison
with other current methods suggested in regulations that are usually based on
limit-equilibrium concept. The outputs shows the over-estimation of current
design method in comparison with displacement based method.looseness=1