Analytical Study of Reinforcement Consumption and Cost Management Due to Seismic Zoning

摘要

This paper investigates an approach for making comparison of seismic evaluation and corresponding costs according to design of concrete frames in different seismic zones of Bangladesh. Bangladesh, one of the world's most densely populated countries with lower medium income, is vulnerable to earthquake hazards for its geological position. It is surrounded by Himalayan Arc, Shilong plateau in the north, the Burmese Arc, Arakan Yoma anticliorium in the east and complex Naga- Disang-Jaflong thrust in the northeast which has made it suited to earthquake. Similarly, the Dauki Fault system along with numerous subsurface actives faults and flexure zone called Hinge Zone raises the earthquake risk factor higher. Therefore, the construction of multistoried building in the different seismic zones (Zone I, Zone II, Zone III) of Bangladesh seek several attention for making it stable to sustain the high magnitude of earthquake with economical design practice. A well known fact is that a code based high-rise construction not only safe for living but it also lessens the construction cost. In this research, it has been represented a comparative study of lateral displacement due to earthquake, construction cost and reinforcement consumption for building construction in different categories of multistoried building in the three seismic zones of Bangladesh. In the present study, earthquake load has been assigned by factorizing with specific zone factor for every zone. Finally, after conducting standard costing and estimation, it has been found that, it increases the cost of construction and amount reinforcement dramatically in the high seismic zone along with high lateral displacement as compared to the other earthquake zone.