Seismic Vulnerability Assessment and Strengthening of New Market Building Damaged after January 4, 2016, Imphal, India, Earthquake
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 2
Abstract
Important buildings located in high seismic zones of many developing countries are sometimes designed without paying much attention to the earthquake risk in the area. Such buildings are prone to severe damage during earthquakes and need immediate strengthening using techniques that should not only be economical but also should not interfere with the functioning of the building. The present study focuses on the assessment of the seismic vulnerability of a publicly funded reinforced concrete building (New Market building) in Imphal, India, that suffered severe damage during January 4, 2016, earthquake. It is further intended to suggest a suitable strengthening strategy for improving the lateral-load performance of the large building used by hundreds of local vendors. A detailed investigation of the damaged building was first carried out visually as well as using nondestructive tools and by collecting concrete core samples from various members of the building. Demand to capacity ratios (DCRs) were obtained using nonlinear static and dynamic analyses to determine the adequacy of the column sections of the building. Local seismic strengthening in the form of reinforced concrete jacketing was applied to the weaker columns () based on several trials to achieve the required global strength and ductility. After retrofitting, yielding of most of the column members is substantially delayed. In addition, the peak story displacement and acceleration are found to be remarkably reduced for both the orthogonal directions. The seismic vulnerability assessment of the original building suggests that most of the column sections do not satisfy the allowable code-specified drift limits; however, the vulnerability reduced substantially after implementing the suggested strengthening scheme.
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Acknowledgments
Assistance provided by Dr. Arun Chandra Borsaikia and Dr. Syed Humayun Basha in carrying out the nondestructive testing is gratefully appreciated. Prof. Durgesh C. Rai of IIT Kanpur and Prof. Vaibhav Singhal of IIT Patna accompanied the last author to the postearthquake reconnaissance visit financially supported by the Poonam and Prabhu Goel Foundation established at IIT Kanpur.
References
BIS (Bureau of Indian Standards). 1959. Method of tests for strength of concrete. IS 516. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 1987. Code of practice for design loads (other than earthquake) for buildings and structures. IS 875. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 1992. Non-destructive testing of concrete—Method of test. IS 13311. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 2000. Indian standard for plain and reinforced concrete—Code of practice. IS 456. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 2013. Seismic evaluation and strengthening of existing reinforced concrete buildings—Guidelines. IS 5988. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 2016a. Criteria for earthquake resistant design of structures. IS 1893. New Delhi, India: BIS.
BIS (Bureau of Indian Standards). 2016b. Ductile detailing of reinforced concrete structures subjected to seismic forces—Code of practice. IS 13920. New Delhi, India: BIS.
Cavaleri, L., and F. D. Trapani. 2014. “Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling.” Soil Dyn. Earthquake Eng. 65 (Oct): 224–242. https://doi.org/10.1016/j.soildyn.2014.06.016.
Chen, W. P., and P. Molnar. 1990. “Source parameters of earthquakes and intraplate deformation beneath the Shillong plateau and northern Indo-Burman ranges.” J. Geophys. Res. 95 (12): 12527–12552. https://doi.org/10.1029/JB095iB08p12527.
CSI (Computers and Structures Inc.). 2015. Structural analysis program, SAP2000 version 18: Advanced, static and dynamic finite element analysis of structures. Berkeley, CA: CSI.
FEMA. 2012. Next-generation methodology for seismic performance assessment of buildings. Washington, DC: FEMA.
Hahn, G. T., V. Bhargava, and Q. Chen. 1990. “The cyclic stress-strain properties, hysteresis loop shape, and kinematic hardening of two high-strength bearing steels.” Metall. Mater. Trans. 21 (2): 653–665. https://doi.org/10.1007/BF02671936.
Hurukawa, N., and M. P. Maung. 2011. “Two seismic gaps on the Sagaing fault, Myanmar, derived from relocation of historical earthquakes since 1918.” Geophys. Res. Lett. 38 (1): L01310. https://doi.org/10.1029/2010GL046099.
Kaushik, H. B. 2016. Non-destructive testing and concrete core cutting at Laxmi Market and New Market in Imphal, Manipur. Manipur, India: Public Works Dept.
Kaushik, H. B., D. C. Rai, and S. K. Jain. 2007. “Stress-strain characteristics of clay brick masonry under uniaxial compression.” J. Mater. Civ. Eng. 19 (9): 728–739. https://doi.org/10.1061/(ASCE)0899-1561(2007)19:9(728).
Mander, J. B., M. J. Priestley, and R. Park. 1988. “Theoretical stress-strain model for confined concrete.” J. Struct. Eng. 114 (8): 1804–1826. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804).
Mukherjee, S., and V. K. Gupta. 2002. “Wavelet-based generation of spectrum-compatible time-histories.” Soil Dyn. Earthquake Eng. 22 (9): 799–804. https://doi.org/10.1016/S0267-7261(02)00101-X.
Paulay, T., and M. J. N. Priestley. 1992. Seismic design of concrete and masonry structures. New York: Wiley.
Person, W. J. 1988. “Seismological notes—January–February.” Bull. Seismol. Soc. Am. 78 (6): 2115–2119.
Rai, D. C., H. B. Kaushik, and V. Singhal. 2017. “M 6.7, 4 January 2016 Imphal earthquake: Dismal performance of publicly-funded buildings.” Curr. Sci. 113 (12): 2341–2350. https://doi.org/10.18520/cs/v113/i12/2341-2350.
Singh, A. P., N. P. Rao, M. R. Kumar, M. C. Hsieh, and L. Zhao. 2017. “Role of the Kopili fault in deformation tectonics of the Indo Burmese arc inferred from the rupture process of the 3 January 2016 Mw 6.7 Imphal earthquake.” Bull. Seismol. Soc. Am. 107 (2): 1041–1047. https://doi.org/10.1785/0120160276.
Takeda, T., M. A. Sozen, and N. N. Neilsen. 1970. “Reinforced concrete response to simulated earthquakes.” J. Struct. Div. 96 (12): 2557–2573.
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©2019 American Society of Civil Engineers.
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Received: Feb 18, 2019
Accepted: Jul 3, 2019
Published online: Dec 18, 2019
Published in print: Apr 1, 2020
Discussion open until: May 18, 2020
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