Strengthening of a Damaged Concrete Structure - Case Study of an Eleven Stories Building in Dar es Salaam

Abstract:

Concrete structures may become obsolete and be unfit for use to the extent that they need special attendance of repair or strengthening so as to revive them. The weakness in the buildings may be caused by natural disasters like earthquake, floods, changes of use of the buildings in which higher loads more than the design loads, e.g. vertical extension loads, are applied. When the structures are defective they need to be strengthened in order to restore their original structural integrity. Sometimes, the defect or deterioration needs to be scientifically analysed first in order to know the root cause of the problem and apply the right corrective measures. A case study on an eleven stories damaged building in is presented, starting with an investigation on causes of sudden crushing of one column and a strengthening method which embraced a number of techniques such as Land Surveying and non-destructive tests in assessing the building structural integrity. The crushed column and other columns is the ground floor were all strengthened using jacketing method and provision of additional columns at the crushed column. Keywords: Columns, crushing, non-destructive tests, concrete quality, deflection, plumb, jacketing, strengthening

• Periodical: Engineering Innovations (Volume 5)
• Pages: 1-13
• DOI: https://doi.org/10.4028/p-2b38z4
• Online since: April 2023
• Authors: John K. Makunza*
• Keywords: Columns, Concrete Quality, Crushing, Deflection, Jacketing, Non-Destructive Tests, Plumb, Strengthening

References

[1] Su R.K.L., Cheng B., L. Wang, W.H. Siu, and Y. Zhu, "Use of Bolted Steel Plates for Strengthening Reinforced Concrete Beams and Columns", The IES Journal Part A: Civil and Structural Engineering, Vol. 4, No.2, May 2011, pp.55-68, Taylor & Francis Group, ISSN 1937-3260.

DOI: 10.1080/19373260.2011.567816

[2] Bassam A Tayeh, Mohammed Abu Naja, Samir Shihada and Mohammed Arafa, "Repairing and Strengthening of Damaged RC Columns Using Thin Concrete Jacketing", Advances in Civil Engineering, Vol. 2019, Article ID 2987412, 16 pages, Hindawi

DOI: 10.1155/2019/2987412

[3] Kunio Fukuyama, Yasuo Higashibata and Yasuyoshi Miyauchi, "Studies on repair and strengthening methods of damaged reinforced concrete columns", Cement and Concrete Composites, Volume 22, Issue 1, 1 February 2000, Pages 81-88.

DOI: 10.1016/s0958-9465(99)00044-x

[4] Bhuvaneshwari P and Saravana Raja Mohan K, "Strengthening of Fire-Damaged Reinforced Concrete Short Columns Using GFPPECC Composites", Arabian Journal of Science and Engineering (2020) 45:8619-8632.

DOI: 10.1007/s13369-020-04795-x

[5] Thanongsak Imjai, Monthian Setkit, Reyes Garcia and Fabio Figueredo, "Strengthening of Damaged Low Strength Concrete Beams Using PTMS or NSM Techniques", Case Studies in Construction Materials 13 (2020), e00403, www.elsevier.com/locate/cscm

DOI: 10.1016/j.cscm.2020.e00403

[6] Makunza JK and Kiwelu H, (2018), Investigation on an Eleven Stories Building on Plot No. 871 Mfaume Street, East Upanga in Ilala Municipality Dar Es Salaam, BICO Report, University of Dar es Salaam, May 2018.

DOI: 10.4314/dmsj.v15i1.52491

[7] Bungare S Taranath, Structural Analysis and Design of Tall Buildings, McGraw-Hill Book Company, ISBN 0-07-062878-5, New York, New Delhi, 1988.

[8] BS 1881: Testing concrete —Part 120 (1983): Method for Determination of Compressive Strength of Concrete Cores, BSI, London.

[9] Makunza JK (2019), Remedial Measures for the Eleven Stories Building on Plot No. 871 Mfaume Street, East Upanga in Ilala Municipality, Dar es Salaam City, BICO Report, University of Dar es Salaam, April (2019)

DOI: 10.4314/dmsj.v15i1.52491

[10] BS 6399 Part 1:1996, Loading for Buildings, Code of Practice for Dead and Imposed Loads, BSI, London, 1996.

[11] Saim Raza, Muhammed K.I. Khan, Scott J Menegon, Hign –Ho Tsang and John L. Wilson, "Strengthening and Repair of Reinforced Concrete Columns by Jacketing; State of the Art-Review", Sustainability MDPI, 2019, 11,3208; doi:10.3390/su11113208, www.dmpi.com /journal/sustainability.

DOI: 10.3390/su11113208