Variability of near‐fault seismic risk to reinforced concrete buildings based on high‐resolution physics‐based ground motion simulations

Abstract

Broadband physics-based simulated earthquake ground motions are utilized to characterize the regional-scale seismic risk to modern reinforced concrete (RC) structures. A highly dense dataset of ground motions covering a 100-km × 40km domain was generated using kinematic fault rupture models with varying rupture characteristics to represent shallow crustal earthquakes and resolved up to frequencies of 5 Hz. Over 40,000 nonlinear response history simulations of short-and mid-rise RC special moment frame buildings were conducted using simulation models that are capable of representing nonlinear behavior and component deterioration effects. The spatial variability of structural risk within a sin- K E Y W O R D Sforward directivity, ground motion simulations, regional-scale risk, reinforced concrete, shallow basin INTRODUCTION AND BACKGROUNDCharacterizing the complex variability of risk to engineered structures near active earthquake faults is a challenging problem hindered by the sparsity of observed earthquake ground motion data in the near-source region. Ground motions

A framework for seismic response analysis of dams using numerical source‐to‐structure simulation

“…[10][11][12][13][14] With the development of the physics-based ground motion simulations, the source-to-structure simulation, which is also called the "end-to-end simulation" has attracted increasing research attention in recent years. 10,[15][16][17][18] However, the seismic analysis for dams based on the source-to-structure simulation is still in its infancy. A key issue for the source-tostructure simulation is how to couple the wave propagation simulation and the structure response analysis.…”

“…With the development of the physics‐based ground motion simulations, the source‐to‐structure simulation, which is also called the “end‐to‐end simulation” has attracted increasing research attention in recent years 10,15–18 . However, the seismic analysis for dams based on the source‐to‐structure simulation is still in its infancy.…”

Simulation‐based characterization of the variability of earthquake risk to buildings in the near‐field

“…Recently, region-specific, physics-based ground motion simulations that account for source, wave path and site effects are becoming of increasing interest and being used in seismic risk analysis. [22][23][24][25][26][27][28][29][30] An advantage of using simulated ground…”

“…Recently, region‐specific, physics‐based ground motion simulations that account for source, wave path and site effects are becoming of increasing interest and being used in seismic risk analysis 22–30 . An advantage of using simulated ground motions in seismic hazard and risk analysis is the ability to incorporate region‐specific source and wave propagation effects that are not fully representable in empirical ground motion models 31 .…”

“…To demonstrate and compute seismic risk accounting for the aforementioned variabilities, a pair of recent studies 28,32 utilized a set of three fault rupture realizations employing an advanced pre‐exascale (1 exaflop = 10 18 FLOPS) HPC earthquake simulation framework (EQSIM). McCallen et al 32 .…”