Narrow Results

Many cities in the Philippines are situated near fault systems that can generate large magnitude of earthquakes. This paper describes the development of a city seismic response analysis approach for Metro Manila’s low- to mid-rise RC structures using frame models which are generated from GIS feature or BIM data. To create the three-dimensional (3D) models, features and structural details from BIM are used. Finite element method was used to discretize the models with mesh of line elements. Validations of generated models were conducted by comparing the results with those obtained using solid finite element model, commercial software and experimental test. The developed approach was applied to a scenario earthquake analysis wherein the causative fault is the West Valley Fault. Two cities within Metro Manila, that vary in distribution of low- and mid-rise building and site condition, were analyzed. The results of statistical analysis show that the variations in distribution of maximum interstory drift (ISD) between cities and between floor levels, are influenced by the height and floor plan area of the structures. Visualizations in both city-level and building-level reveal the areas that are critical for the considered scenario earthquake. Analysis of the computation costs shows that using frame models for response analysis of each city in Metro Manila leads to million-order degrees-of-freedom (DoF) to solve, and necessitates the implementation of data partitioning and high performance computing techniques.