This is the second of two papers describing a procedure for the three-dimensional nonlinear time-history analysis of steelframed buildings. An overview of the procedure and the theory for the panel zone element and the plastic hinge beam element are presented in part I. In this paper, the theory for an efficient new element for modeling beams and columns in steel frames called the elastofiber e...

in this study a nonlinear asymmetric instability analysis carried out to study primary atomization of annular liquid sheets emanating from the prefilming airblast atomizer using a perturbation method and potential flow assumption. in this direction, firstly governing equations derived according to potential flow assumption and conservation equations while dynamic and static boundary condition a...

This study aimed to investigate whether the seismic fragility and performance of interaction soil-pile-structure (ISPS) were affected by different parameters: axial load, a section pile, longitudinal steel ratio pile implanted in type sand (loose, medium, dense). In order better understand ISPS phenomena, series nonlinear static analysis have been conducted for two cases, namely: (i) fixed syst...

The aim of this paper is to investigate geometrically nonlinear static analysis of axially functionally graded cantilever beam subjected to transversal non follower load. The considered problem is solved by finite element method with total Lagrangian kinematic approach. The material properties of the beam vary along the longitudinal direction according to the power law function. The finite elem...

The object of this paper is the evaluation of the seismic response of reinforced concrete frames designed according to the DDBD (direct displacement-based design) approach. The great part of research works about DDBD has been dedicated to planar frames, but recently also some proposals for 3D structures have been presented, in particular for wall structures. This paper will give a further contr...

Heritage structures are an important part of the history each community as well economic resource. This study aims to investigate earthquake damage and failure mechanism a historic Bazaar located in Kashan (center Iran), which dates back eighteenth century. Numerical models were built by macro method, considering two cases fixed support soil–structure interaction (SSI). To assess structural beh...

The present study offers a deductive design procedure based on designs that have been optimally screened in accordance with ASCE 41-17's nonlinear static (NSP). subsequent phase inferred linear methodology from the philosophy underlying NSP of 41-17. deduced is applied to provide set optimal 6-story SMRF under two load patterns: code-based and first-mode shape patterns. by proposed are compared...

This paper discusses a seismic retrofit method that is intended for reinforced concrete (RC) frame structures and sees the replacement of existing masonry infills with timber structural panels. The intervention aimed at enhancing overall behaviour buildings without modifying original system. In presented research over 200 finite-element models comprising bare, masonry-infilled retrofitted singl...

This study deals with performance-based design optimization (PBDO) of steel moment frames employing four different metaheuristics consisting of genetic algorithm (GA), ant colony optimization (ACO), harmony search (HS), and particle swarm optimization (PSO). In order to evaluate the seismic capacity of the structures, nonlinear pushover analysis is conducted (PBDO). This method is an iterative ...