Abstract
The present paper addresses the comparative study of three adjacent single-degree-of freedom structures for elastic and inelastic system with and without pounding under seismic excitations. For the gap between three adjacent structures, the simulation is done by using linear spring element without damping. The entire numerical simulation is done in time domain by considering the inputs of four real ground motions. The results of the study show that the response of elastic system is much different to that of response of inelastic system in the absence and presence of pounding, especially in lighter or more flexible structures. Elastic structures show much severe pounding response than inelastic structures. Modeling of colliding structures behaving inelastically is really needed in order to obtain the accurate structural pounding involved response under seismic excitation.
Highlights
Structural pounding of buildings and bridges during seismic excitations is a well observed phenomenon in the recent past
In the San Fernando earthquake (1971) of severe intensity, it has observed that the second storey of Olive View hospital struck against the stair-tower block, and in addition the first floor of the hospital hit against adjacent warehouse [2]
The fundamental study on seismic pounding between the adjacent buildings in series was performed by Anagnostopoulus [4], where the structures were modeled as single-degree-of-freedom (SDOF) system and collisions were simulated by using linear viscoelastic gap elements
Summary
Structural pounding of buildings and bridges during seismic excitations is a well observed phenomenon in the recent past. The fundamental study on seismic pounding between the adjacent buildings in series was performed by Anagnostopoulus [4], where the structures were modeled as single-degree-of-freedom (SDOF) system and collisions were simulated by using linear viscoelastic gap elements. Pentelides and Ma [5] have studied the dynamic behavior of damped SDOF elastic and inelastic structures subjected to one-side pounding incidences during an applied ground excitation; the pounding forces are simulated by considering Hertz contact gap element. Various analytical models based on contact force mechanism and steromechanical mechanism considered for the seismic pounding response of adjacent structures were studied by Muthukumar and DesRoches [9]. The formulations of SDOF for one sided and both sided pounding incidences are presented in details Both elastic and inelastic material behaviors of the SDOF structures have been considered. In the present paper pounding force investigations should be done as per the contact force mechanism by using linear spring model with some stiffness but no damping
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