Nonlinear static pushover analysis of the UPLB Main Library

Date

6-2016

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Richelle G. Zafra

Abstract

Laguna is surrounded by numerous faults, one of which is the West Valley Fault which can produce a 7.2 magnitude earthquake event. UPLB is approximately 20 km away from this fault such that a study was conducted to determine seismic risks to buildings in the campus. The UPLB Main Library ranked second in the prioritization of administration and service buildings with respect to seismic risks. The UPLB Main Library is a four-storey reinforced concrete building with vertical irregularity. Also, this structure was built in 1970 which is nearly approaching a concrete structure?s serviceable life of fifty years which makes it necessary for the structure to be subjected to a more detailed seismic analysis. In this study, the UPLB Main Library was subjected to Nonlinear Static Pushover analysis to assess its seismic response using displacement-based approach. Structural modeling of the structure?s moment resisting frame utilized idealized material nonlinearity models, specifically a lumped plasticity model. Furthermore, two models, a fixed base model, and a flexible base model were constructed to also determine the effect of foundation modeling to the structure?s response. The UPLB Main Library was evaluated based on a structural performance level of Life Safety which assumes moderate overall damage of the structure after an earthquake event. Pushover curves were generated and target displacements for each model were determined considering a 475-year earthquake event. For a Life Safety performance level, foundation to ground floor columns as well as ground to second floor columns failed. Results of this study identified weak points in the structure which may require repair or retrofit.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

Thesis

Document Type

Thesis

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