Utility of Stochastic Ground Motion Models in Conditional Spectrum-Based Selection Consistent with the Causal Earthquakes

被引:1
作者
Senthil, Naveen [1 ]
Lin, Ting [1 ,2 ]
机构
[1] Texas Tech Univ, Dept Civil Environm & Construction Engn, Lubbock, TX USA
[2] Texas Tech Univ, Dept Civil Environm & Construction Engn, Lubbock, TX 79409 USA
关键词
Ground motion selection; conditional spectrum; hazard consistency; causal earthquake scenarios; stochastic simulations; surrogate modeling; AVERAGE HORIZONTAL COMPONENT; PREDICTION EQUATIONS; SIMULATION; DURATION; HAZARD; ALGORITHM; PERIODS; PGV;
D O I
10.1080/13632469.2024.2317964
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Conditional Spectrum (CS), characterized by a conditional mean and conditional standard deviation, serves as a target spectrum linking seismic hazard information to ground motion selection for seismic demand analysis. Current Ground Motion Selection and Modification (GMSM) methods aim to align with this target spectrum but face challenges due to the limited availability of recorded ground motions and potential modifications, leading to difficulties in ensuring selected ground motions accurately reflect site characteristics. Addressing this issue, the study presents an algorithm to select hazard-consistent CS-based records utilizing a stochastic ground motion model with a dual objective: (1) alleviate the need for scaling during the selection process, and (2) select records consistent with the target hazard and the contributing causal scenarios. To achieve both objectives, the study generates a database of hazard-targeted ground motions utilizing the kriging surrogate with scenarios sampled from the disaggregation matrix. Then, a postprocessing step explicitly considers causative parameters in the selection process. The algorithm's potential to select site-specific ground motions is demonstrated using sites in the Western United States, providing insights into the computational cost and accuracy. Additionally, statistical comparisons are conducted to explore circumstances where similar hazard consistency can be achieved without the postprocessing step, reducing the overall computational cost. Finally, the selected ground motions are favorably compared to those selected through traditional conditional spectrum-based approaches based on their spectral shape and ground motion intensity measures.
引用
收藏
页码:2113 / 2133
页数:21
相关论文
共 37 条
[1]   Summary of the Abrahamson & Silva NGA ground-motion relations [J].
Abrahamson, Norman ;
Silva, Walter .
EARTHQUAKE SPECTRA, 2008, 24 (01) :67-97
[2]  
Ang AH-S., 2007, PROBABILITY CONCEPTS, V2nd
[3]   An Improved Algorithm for Selecting Ground Motions to Match a Conditional Spectrum [J].
Baker, Jack W. ;
Lee, Cynthia .
JOURNAL OF EARTHQUAKE ENGINEERING, 2018, 22 (04) :708-723
[4]   Conditional Mean Spectrum: Tool for Ground-Motion Selection [J].
Baker, Jack W. .
JOURNAL OF STRUCTURAL ENGINEERING, 2011, 137 (03) :322-331
[5]   Ground-motion prediction equations for the average horizontal component of PGA, PGV, and 5%-damped PSA at spectral periods between 0.01 s and 10.0 s [J].
Boore, David M. ;
Atkinson, Gail M. .
EARTHQUAKE SPECTRA, 2008, 24 (01) :99-138
[6]   Simulation of ground motion using the stochastic method [J].
Boore, DM .
PURE AND APPLIED GEOPHYSICS, 2003, 160 (3-4) :635-676
[7]  
Bozorgnia Y., 2004, EARTHQUAKE ENG ENGIN
[8]   A generalized conditional intensity measure approach and holistic ground-motion selection [J].
Bradley, Brendon A. .
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 2010, 39 (12) :1321-1342
[9]   NGA ground motion model for the geometric mean horizontal component of PGA, PGV, PGD and 5% damped linear elastic response spectra for periods ranging from 0.01 to 10 s [J].
Campbell, Kenneth W. ;
Bozorgnia, Yousef .
EARTHQUAKE SPECTRA, 2008, 24 (01) :139-171
[10]   An NGA model for the average horizontal component of peak ground motion and response spectra [J].
Chiou, Brian S. -J. ;
Youngs, Robert R. .
EARTHQUAKE SPECTRA, 2008, 24 (01) :173-215