Base isolation by geosynthetic for brick masonry buildings

Abstract

The use of geosynthetic in civil engineering applications has experienced tremendous growth. The concept of seismic isolation is applied here for vibration control to masonry buildings by separating the superstructure from the foundation at plinth level by a sliding earthquake energy reducing friction layer in the form of green marble/geotextile sliding couple. The dynamic properties of the friction interface have been investigated. The effect of the ground motion on the behavior of a friction isolation system is investigated analytically by using a synthetic accelerogram that is compatible with the design spectrum of Indian Standard corresponding to the level of maximum considered earthquake in the most vulnerable seismic zone (PGA = 0.36 g) of India as well as a recorded accelerogram of the El Centro earthquake. It is observed that the frictional base isolation provided by the geotextile limits the earthquake energy transmission to the superstructure during a strong earthquake. Fifty per cent reduction in absolute response acceleration at roof level for the isolated structure is obtained compared with a fixed base structure at the cost of peak base sliding displacement, which is well within a plinth projection of 75 mm (3 in) and appears to be a more economical and more practical choice than other alternatives for frictional base isolation of a single story brick masonry structure.

Keywords

Base isolation brick masonry buildings geosynthetic pure friction vibration control

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References

Arya

(1984) Sliding concept of mitigation of earthquake disaster to masonry buildingsProceedings of 8th World Conference on Earthquake Engineering, July 21-28, Vol. 5. San Francisco, CA: 951–958.

Indian Standard: 1893 (2002) (2002) (Part 1): 2002 Criteria for Earthquake Resistant Design of Buildings. New Delhi: Bureau of Indian Standard.

Kavazanjian

EJR

Hushmand

Martin

(1991) Frictional base isolation using a layered soil-synthetic liner system. In Proceedings of 3rd US Conference on Lifeline Earthquake Engineering, ASCE Technical Council on Lifeline Earthquake Engineering Monograph No 4, August 22-23, pp.. 1139–1151.

Kelly

(1986) Aseismic base isolation: review and bibliography. Soil Dynamics and Earthquake Engineering 5(3): 202–216.

(1984) Base isolation measure for aseismic buildings in chinaProceedings of 8th World Conference on Earthquake Engineering, July 21-28. Vol. 6. San Francisco, CA: 791–798.

Lou

Wang

(1992) A research of sliding shock absorbing multi-storey brick buildingProceedings of 10th World Conference on Earthquake Engineering.Vol. 4. Madrid: 2499–2503.

Mostaghel

Tanbakuchi

(1983) Response of sliding structures to earthquake support motion. Earthquake Engineering and Structural Dynamics 11(6): 729–748.

Nanda

Agarwal

Shrikhande

(2008) Earthquake hazard mitigation for rural dwellings by p-f base isolation. In Proceedings of 14th World Conference on Earthquake Engineering, October 12--17. Beijing, Paper id-09-02-0017.

Nanda

Agarwal

Shrikhande

(2010) Frictional base isolation by geotextiles for brick masonry buildings. Geosynthetic International 17(1): 48–55.

10.

Nikolic-Brzev

(1993) Seismic protection of multi-storey brick buildings by seismic isolation technique. Phd thesis . Roorkee: Department of Earthquake Engineering, University of Roorkee, India.

11.

Nikolic-Brzev

Arya

(1996) Seismic isolation of masonry buildings-an experimental study. In Proceedings of 11th World Conference on Earthquake Engineering, June 23-28, Acapulco. Mexico, Paper No. 1338–1338.

12.

Qamaruddin

Arya

Chandra

(1986) Seismic response of masonry buildings with sliding superstructure. Journal of Structural Engineering 112: 2001–2011.

13.

Sassu

(2006) The reinforced cut wall (rcw): a low-cost base dissipator for masonry buildings. Earthquake Spectra 22(2): 533–554.

14.

Song B, Yin C, Zhang X and Tao S (1990) Experimental study and seismic response analysis of multi-storeyed brick buildings with friction base isolation. In Proceedings of 5th North American Masonry Conference, June 3–6, Urbana-Champaign, IL, pp. 777–787.

15.

Tehrani

Hasani

(1996) Behaviour of Iranian low rise buildings on sliding base to earthquake excitation. In Proceedings of 11th World Conference on Earthquake Engineering. Mexico, Paper No. 1433–1433.

16.

Tsopelas

Constantinou

Kim

Okamoto

(1996) Experimental study of FPS system in bridge seismic isolation. Earthquake Engineering and Structural Dynamics 25(1): 65–78.

17.

Westermo

Udwadia

(1983) Periodic response of a sliding oscillator system to harmonic excitation. Earthquake Engineering and Structural Dynamics 11(1): 135–146.

18.

Yegian

Kadakal

(1998) Geosynthetic interface behaviour under dynamic loading. Geosynthetic International 5(1–2): 1–16.

19.

Yegian

Lahlaf

(1992) Geomembranes as base isolation. Geotechnical Fabrics Reports 10(6): 17–21.