Publication: Cost analyses for earthquake resistant reinforced concrete buildings based on the Malaysian National annex to eurocode 8
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Date
2022-06-01
Authors
Faisal, Farhanah
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Abstract
In Malaysia, the existing reinforced concrete (RC) buildings were designed by considering gravitational loads only. As such, some of this buildings experienced damages when subjected to dynamic loads from the local earthquakes. The 2015 Ranau earthquake is seen as a catalyst for Malaysian construction sector to accelerate the full implementation of seismic design in accordance with the published Malaysia National Annex (NA) to Eurocode 8 (EC 8) in 2017. However, the effect of seismic design consideration on the cost of construction materials for new buildings need to
be investigated beforehand to provide information on economic implication to the stakeholders and contractors. Therefore, this study is conducted to estimate therequired material cost in term of concrete and steel reinforcement between non-seismic and seismic design. In this study, six models of 1, 3, 5, 9, 10 and 12-storey had been analysed under different soil types and designed for medium ductility class (DCM) with 0.16 g of peak ground acceleration (PGA) based on contour map in Malaysia NA 2017 as the existing RC buildings were assumed to be in Ranau, Sabah. The results showed that the percentage increase in the total cost of concrete for RC buildings with seismic design was in the range of 4% to 191% compared to
the corresponding RC buildings designed without considering the seismic effects. Meanwhile, the percentage difference in the total cost of reinforcement for RC buildings between non-seismic and seismic design was in the range of 11% to 318%.