3 research outputs found
Computational Investigation of Soil Liquefaction Susceptibility based on Standard Penetration Test Value of Miri District (Sarawak, Malaysia)
Miri is a district of Sarawak state of Malaysia and is a coastal area located at the boundary of Brunei.
This paper deciphers the analysis of liquefaction susceptibility of the Miri district. Standard penetration
test with N values (SPT-N) empirical criteria has been used for evaluating the liquefaction susceptibility
in the Miri district. The software LiquefyPro and LiqIT have been used for the analysis by using the
Idriss and Boulanger approach as this methodology encompass a simple technique and calculation.
This exploration utilized a seismic tremor record from another area well-matched from target response
spectrum with comparative qualities of Sarawak earthquake acquired from the Pacific Earthquake
Engineering Research Center (PEER) online database (PEER NGA) with a moment magnitude of 6.0
and peak ground acceleration as 0.15 g on the ground surface. The ground motions assigned for
assessment are predominantly attentive on a good complete match for the target response spectrum and
on actual earthquakes that might happen in Sarawak. Liquefaction potential index (LPI), the factor of
safety (Fs) and the probability of liquefaction (PL) for each soil layer was determined and then summed
up for each borehole and were used to plot the contour maps by utilizing the geographical information
system (GIS). From the results, the overall area of Miri is not liquefiable, only a few sites have
liquefaction index as high, moreover, the obtained results of this study by using the methodology of
Idriss and Boulanger are reliable. The results of this study can be used in seismic microzonation
A Framework of Systematic Land Use Vulnerability Modeling Based on Seismic Microzonation : A Case Study of Miri District of Sarawak, Malaysia
The objective of this research is to develop the framework for sustainable land-use
planning on the basis of seismic microzonation to reduce the devastating effects of future
earthquakes by utilizing the software geographical information system (ArcGIS). Miri
district of Sarawak in Malaysia has been chosen as the study area because of having the
highest peak ground acceleration which is 0.09g in terms of the 10% probability of
exceedance in 50 years. In addition, the frequency of an earthquake with a magnitude up
to 5.3 is approximately every 5-7 years. Therefore, it is vital to introduce land use
planning in order to diminish the adverse effects of earthquakes in the future. For this
purpose, Google Earth Pro was used for the collection of satellite image data for land use
planning purposes. From the results, it was found that the seismic hazard in the Miri
district varies from low to high corresponding to 2475 years of return period with low to
moderate as predominant over the Miri district. Only a few areas are under high hazard.
Also, the land use planning map was compared with the current land use map acquired
from satellite imagery and it was found that all built-up is in the low hazard area. It is
envisaged that the findings from this research will contribute immensely to the literature
that will serve as background information and a guide for analysts, disaster management,
engineering designers and seismologists in Malaysia and the world as a whole