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Earthquakes and Structures
  Volume 6, Number 4, April 2014 , pages 437-455
DOI: https://doi.org/10.12989/eas.2014.6.4.437
 


A new lateral load pattern for pushover analysis in structures
H. Gholi Pour, M. Ansari and M. Bayat

 
Abstract
    Some conventional lateral load patterns for pushover analysis, and proposing a new accurate pattern was investigated in present research. The new proposed load pattern has load distribution according weight and stiffness variation in height and mode shape of structure. The assessment of pushover application with mentioned pattern in X type braced steel frames and steel moment resisting frames, with stiffness and mass variation in height, was studied completely and the obtained results were compared with nonlinear dynamic analysis method (including time history analysis). The methods were compared from standpoints of some basic parameters such as displacement, drift and shape of lateral load pattern. It is concluded that proposed load pattern results are closer to nonlinear dynamic analysis (NDA) compared to other pushover load patterns especially in tall and medium-rise buildings having different stiffness and mass during the height.
 
Key Words
    pushover load pattern; nonlinear dynamic analysis; steel frames; tall and medium-rise buildings; load distribution
 
Address
H. Gholi Pour : Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
M. Ansari : Department of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
M. Bayat : Department of Civil Engineering, College of Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
 

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