Nonlinear Response of RC Structures: Statistical Effects of Artificial Ground Motions

2020 ◽  
pp. 893-906
Author(s):  
Francesco Basone ◽  
Liborio Cavaleri ◽  
Marco Filippo Ferrotto
Keyword(s):  
Nonlinear Response ◽  
Ground Motions ◽  
Rc Structures ◽  
Statistical Effects

scholarly journals Artificial Ground Motions and Nonlinear Response of RC Structures

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Marco Filippo Ferrotto ◽  
Francesco Basone ◽  
Panangiotis G. Asteris ◽  
Liborio Cavaleri
Keyword(s):  
Nonlinear Response ◽  
Nonlinear Dynamic Analysis ◽  
Point Of View ◽  
Reference Structure ◽  
Statistical Point ◽  
Rc Structures ◽  
Advantages And Disadvantages ◽  
Artificial Records ◽  
Different Levels ◽  
Selection Of

The selection of seismic inputs for nonlinear dynamic analysis is widely debated, mainly focusing on the advantages and disadvantages provided by the choice of natural, simulated, or artificial records. This work proves the differences in the structural behavior of RC buildings when using accelerograms with different levels of stationarity. Initially, nonlinear response under three sets of accelerograms equivalent in terms of pseudo acceleration spectrum is evaluated and compared. Then, the results of incremental dynamic analyses are compared by the statistical point of view considering different levels of irregularity for the reference structure.

scholarly journals Significance of Rotating Ground Motions on Behavior of Symmetric- and Asymmetric-Plan Structures: Part II. Multi-Story Structures

2015 ◽  
Vol 31 (3) ◽  
pp. 1613-1628 ◽  
Author(s):  
Erol Kalkan ◽  
Juan C. Reyes
Keyword(s):  
Ground Motion ◽  
Nonlinear Response ◽  
Rotation Angle ◽  
Ground Motions ◽  
Three Dimensional ◽  
Companion Paper ◽  
Apparent Velocity ◽  
Near Fault ◽  
Design Values ◽  
Linear And Nonlinear

The influence of the ground motion rotation angle on engineering demand parameters (EDPs) is examined in the companion paper based on three-dimensional (3-D) computer models of single-story structures. Further validations are performed here using 3-D models of nine-story buildings that have symmetric and asymmetric layouts subjected to a suite of bi-directional near-fault records with and without apparent velocity-pulses. The linear and nonlinear response-history analyses (RHAs) are used for evaluating the use of fault-normal and fault-parallel (FN/FP) directions and maximum-direction (MD) to rotate ground motions. This study suggests that individual ground motions rotated to MD or FN/FP directions not always provide conservative EDPs in nonlinear range, but often produce larger EDPs than as-recorded motions. In practice, when a suite of ground motions is used, nonlinear RHAs should be performed by rotating them to the MD and FN/FP directions, and maximum response values should be taken from these analyses as design values.

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