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The susceptibility of the Philippines to an earthquake is high due to its location. It is found in the Pacific ring of fire making most of its structure vulnerable to earthquakes. Especially of those that are near active faults and structure that are considerably decrepit. Manila, being at the center of economic, academic, residential and commercia...
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The Philippines is found in the Pacific ring of fire making most of its
structures vulnerable to earthquakes. Especially those structures of old age that are
considerably worn out and are located near and along active fault lines. Manila, being
the center of economic and commercial activities in the Philippines, is in danger due to
the West Valley...
Citations
... For each damage rank using log normal distribution was used to plot the fragility curve of the structure. It is found that the carriageway pier for LRT Line 1 Monumento to 5th Avenue is relatively safe and strong enough to withstand an earthquake since it can withstand the 0.4g earthquake and will have an extensive damage at 2.0g PGA (Baylon, 2017). The same procedure was done in the seismic assessment of Lambingan Bridge in Malabon City, wherein the researchers used SAP2000 computer program to integrate the fragility curve. ...
The Philippines is situated at the Pacific Ring of Fire and is known for being the focal point of active volcanoes on both land and water, making it susceptible to earthquakes and tsunamis that cause threat to infrastructure. One of the most vulnerable structures are public bridges, specifically the MacArthur Bridge in Manila. The study focuses on analyzing the seismic vulnerability of MacArthur Bridge when subjected to 15 local and international high magnitude earthquakes. The main objective of the study is to perform a seismic vulnerability assessment of the MacArthur Bridge in Manila using the fragility curve based on Pushover Analysis and Capacity-Spectrum Method. To plot the fragility curve, the structural plan of the MacArthur Bridge was modelled using the CSiBridge. The result from the Pushover Analysis, the yield displacement and maximum displacement when subjected to gravity loads and result from Capacity-Spectrum Method, the ductility demand were used to generate the seismic fragility curve. The Fragility Curves indicate that there is a high possibility of exceedance that the MacArthur Bridge will have significant damage starting at 0.7g at EW direction and 0.6g at NS direction. Based on the PHILVOCS 500-Year Return Period, the peak ground acceleration in Manila where the MacArthur Bridge is located is at 0.3g, for 1000-Year Return Period is 0.4g and 0.45g for 2500 return period. In relation to the Probability of Exceedance based on the plotted Fragility Curves, it has a lower chance of exceeding or reaching its damage state.
