Publicación: NONLINEAR MODELING OF MIDRISE CROSS-LAMINATED TIMBER BUILDINGS THROUGH PARALLEL AND SEQUENTIAL COMPUTING TECHNIQUES
Fecha
2023
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LECTURE NOTES IN CIVIL ENGINEERING
Resumen
THE SEISMIC ANALYSIS OF MASS TIMBER STRUCTURES THROUGH NUMERICAL MODELS IS CHALLENGING DUE TO THE SYSTEM'S LARGE NUMBER OF NONLINEAR COMPONENTS AND THE COMPLEX FAILURE MECHANISMS DEVELOPED. ADDITIONALLY, IF LONG-DURATION MEGATHRUST EARTHQUAKE RECORDINGS NEED TO BE CONSIDERED, THE TIME CONSUMPTION OF THE COMPUTATION INCREASE SIGNIFICANTLY. THEREFORE, REFINED AND ADVANCED NONLINEAR NUMERICAL MODELS THAT DEMAND HIGH COMPUTATION CAPACITY NEED TO BE CONSIDERED. IN ORDER TO ANALYZE THE LATERAL BEHAVIOR OF CROSS-LAMINATED-TIMBER STRUCTURES, DETAILED COUPLED THREE-DIMENSIONAL NUMERICAL MODELS WERE DEVELOPED IN OPENSEESMP. EVERY COMPONENT OF THE CLT SYSTEM WAS INCLUDED (WALLS, SLABS, SCREWS, AND MECHANICAL CONNECTIONS), AS WELL AS THE FRICTION AND CONTACT INTERACTION AT THE FOUNDATION FLOOR SLABS AND THE WALL-TO-WALL INTERFACE. THE NUMERICAL MODELS? SIZE WAS AROUND 120.000 DOF. IN THIS RESEARCH, SEQUENTIAL AND PARALLEL MODELING TECHNIQUES WERE COMPARED USING STANDARD DESKTOP PCS (8 CORES I7 PROCESSOR). FOR THE IMPLEMENTATION OF THE PARALLEL MODELS, A STATIC DECOMPOSITION APPROACH WAS USED. EIGHT AND THREE CORES WERE EMPLOYED TO PERFORM THE ANALYSES; THEREFORE, THE PARALLELIZATION CONSIDERS THE SEGMENTATION INTO THREE AND EIGHT SUBDOMAINS, RESPECTIVELY. A TOTAL OF 6-TIME HISTORY ANALYSES USING LONG-DURATION SUBDUCTION EARTHQUAKE RECORDINGS FOR EACH CASE OF STUDY WERE PERFORMED. MAIN RESULTS SHOW THAT THERE IS A 50%-TIME REDUCTION IN THE PARALLEL WITH RESPECT TO THE SEQUENTIAL MODELING APPROACH. HOWEVER, INCREASING FROM THREE TO EIGHT PROCESSING CORES MARGINALLY IMPROVES THE PERFORMANCE OF THE NUMERICAL MODELS.
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Parallel computing techniques, Nonlinear seismic analysis, Mid-rise CLT buildings
