Philippine E-Journals

Seismic vulnerability assessment of Sta. Lucia high school in Pasig City Philippines using rapid visual assessment and fragility curves

Michael B. Baylon | Crispin S. Lictaoa | Independence Jcan C. Castillo | Chariz Kate P. Dungog | Leny Rose Jerusalem

 

Abstract:

The Philippines being part of the pacific ring of fire, faces huge threats of massive damage to infrastructures after extensive earthquakes. One of the most vulnerable infrastructures is public school buildings, which are considered significant structures since they have both emergency and educational function value to the society. Sta. Lucia High School in Pasig, located near the West Valley Fault, will be the focus of this paper. The main objectives of this research are to implement rapid visual assessment using Safer Communities through Safer Schools (SCOSSO) application and to generate the seismic fragility curve of the building based on the Capacity- Spectrum Method. The researchers conducted a rapid but thorough assessment of the BCE II building by following the guidelines of the SCOSSO application. The building had an estimated seismic vulnerability of 66%, thus needing further comprehensive assessment. For the generation of fragility curves, the structural plan of the building was modeled in SAP2000 and subjected to 20 ground motion data. The results from the capacity spectrum method were then used for the seismic fragility curves. The structure was found to attain its completely damaged state at a PGA of 0.352g or greater, with a probability exceedance of 10% which takes place at the weaker axis of the building in the north-south direction of the earthquake along the x-axis. The fragility curves have shown that the stronger the peak ground acceleration, the higher the chance of the building to collapse.