A Study Of Site Characteristics
Affecting Seismic Strengthening Strategy
Author(s)
G. C. Yao & W. C. Chen
Abstract
This study demonstrates that geological characteristics will affect seismic retrofit
strategy. An old temple had been retrofitted before but still suffered serious
damage from recent earthquakes. In order to find a good solution to strengthen
the temple, a computer structural model of the target building was built and its
accuracy was verified by using ambient vibration experiment. From nearby
seismic station records, we then studied the strong motion characteristics using
response spectrum analysis. The results indicated that increasing the building’s
stiffness would also increase the input energy. Therefore, we proposed another
retrofit scheme to consume earthquake energy instead of increasing the
building’s stiffness. A conceptual strengthening model was developed and
computer analysis was targeted for the temple’s inter-story drift ratio to be kept
under 0.5%. The effect of the final design was analyzed and discussed.
Keywords: retrofit, response spectrum analysis, inter-story drift ratio.
1 Introduction
Since the 1999 Chi-Chi Earthquake, higher requirements of seismic capacity
have been increasingly recognized in Taiwan. However, many old buildings can
only be retrofitted rather than rebuilt. There are plenty of retrofit methods. In
addition to raising the stiffness of buildings to reduce the earthquake deformation
[1–3], consuming the input energy of earthquakes can also be used for
retrofitting purpose [4]. In general, traditional retrofit methods are about adding
shear walls and wing walls. Besides, RC jacketing system and Steel-Framing
System are also common in Taiwan. These seismic retrofit strategies are to raise
the strength and stiffness of buildings to resist earthquakes, and this is considered
Keywords
retrofit, response spectrum analysis, inter-story drift ratio
Related Book
Other papers in this volume
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