TY  - JOUR
T1  - An Investigation on the Effect of the Near-Fault Earthquakes on the
Seismic Behavior of RC Moment Resisting Frames (MRFs)
Designed Based on Iranian Seismic Code (Standard No. 2800)
AU - Harati, Mojtaba AU - Sabet, Ahmad Hojjati AU - Modaraei, Ataollah Hajati 
JO  - Journal of Engineering and Applied Sciences
VL  - 11
IS  - 2
SP  - 274
EP  - 283
PY  - 2016
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2016.274.283
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2016.274.283
KW  - Near-fault earthquakes
KW  -forward directivity
KW  -RC Moment Resisting Frame (MRF)
KW  -Iranian National Building Code
KW  -EARS
AB  - Past severe earthquakes such as Bam earthquake of 2003 and Tabas earthquake of 1978 have
demonstrated that many cities in Iran are prone to be struck by near-fault earthquakes. Such earthquakes are
impulsive in nature and therefore, they are more destructive than the ordinary ground shaking. In the 4th edition
of Iranian Seismic Code (Standard No. 2800), some changes including a modification factor for the Elastic
Acceleration Response Spectrum (EARS) have been recently recommended to reflect the effects of such
probable near-fault earthquakes for the designing procedure. In this study, a numbers of 2D RC Moment
Resisting Frames (MRFs) from 4-12 story buildings are designed linearly based on Iranian National Building
Code (INBC) and Standard No. 2800 as well. Subsequently their nonlinear models are reproduced for
conducting Non-linear Dynamic Time History (NDTH) analysis. For this purpose, twenty impulsive ground
motions are selected and scaled to be compatible with the Designed Based Earthquake (DBE) spectrum of the
above mentioned code. It is concluded that the seismic performance of the analyzed structures are not
satisfactory at all; no buildings are successful to satisfy the Life Safety (LS) performance level posed by
guidelines such as ASCE41-06 or ASCE41-13. Moreover, it is worth mentioning that even Collapse Prevention
(CP) limit states are not also met in some cases. Therefore, the recently added modifications in the Standard No.
2800 may be inadequate to incorporatethe near-fault earthquakes’ effects. At the end some recommendations
are addressed for the design of structures built in the regions vulnerable to be attacked by near-fault
earthquakes.
ER  -