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Seismic Demand for Low-Rise Reinforced Concrete Buildings of Islamabad–Rawalpindi Region (Pakistan)

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Abstract

Determination of appropriate seismic demand is important for deriving reliable seismic forces for use in structural design and vulnerability assessment. Demand can be defined by either probabilistic or deterministic approaches depending on the use of the assessment. The use of probabilistic or deterministic approaches depends on the level of the assessment since deterministic can mostly be used for single structures whereas probabilistic for city or country level assessment. This paper presents demand characterization which is based on results of existing seismic hazard studies and local tectonic features around Islamabad–Rawalpindi region (study region) in Pakistan. Existing seismic zoning maps and recent probabilistic seismic hazard studies are reviewed, and the findings are used to quantify and compare the demand for a typical low-rise reinforced concrete building. As another option, deterministic demand is defined through spectra using suitable attenuation relationship which is assessed and validated using the Kashmir earthquake and other similar earthquakes data. Deterministic spectra for study region are generated by considering the critical local tectonic features. Federal Emergency Management Agency (FEMA 356) approach is used for smoothening of deterministic spectra, and the new spectral corner periods are calculated.

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Abbreviations

BCP:

Building Code of Pakistan

GSP:

Geological Survey of Pakistan

GSHAP:

Geological Seismic Hazard Assessment Program

MSSP:

Micro seismic Studies Program

PAEC:

Pakistan Atomic Energy Commission

PMD:

Pakistan Meteorological Department

PSC:

Pakistan Seismic Code

NESPAK:

National Engineering Services Pakistan

UBC:

Uniform Building Code

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Correspondence to Qaiser Uz Zaman Khan.

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Ahmad, S., Pilakoutas, K., Khan, Q.U.Z. et al. Seismic Demand for Low-Rise Reinforced Concrete Buildings of Islamabad–Rawalpindi Region (Pakistan). Arab J Sci Eng 43, 5101–5117 (2018). https://doi.org/10.1007/s13369-017-2924-1

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