An economic solution for stabilising a slender arch roof
A special study was made to evaluate the seismic response of the ribs of four reinforced concrete arch aircraft hangars and to assess methods of strengthening the ribs. The study was based on a series of non linear dynamic analyses of the arch ribs, with particular consideration being given to the choice of earthquake records, to the effect of P-delta actions on the arch responses and to the validity of the behaviour predicted by the computer program. The analyses indicated that the arch ribs could become unstable as a result of the P-delta effect acting in combination with reduction in the rib stiffness due to concrete cracking. However, the study also shows that the arches can be stablised very economically by using prestressing strand to provide cross bracing.
NZS 4203: "Code of Practice for General Structural Design and Design Loadings for Buildings", SANZ, 1st Ed. 1976.
Clough, R.W. and Penzien, J., "Dvnamics of Structures", Intl. Students Edition, McGraw-Hill Kogakusha Ltd, Tokyo.
Kanaan, A. and Powell, G.H., "General Purpose Computer Program for Inelastic Dynamic Response of Plane Structures", EERC 73-6, University of California, Berkeley, California, 1973.
STRUDL User Manual, McDonnell Douglas, Saint Luis, Mo., April 1985.
Lensen, G.J., "Geological Map of NZ 1: 250,000, Sheet 11, Dannevirke, 1st Ed. 1962, DSIR, Wellington, NZ.
Mansar, G., New Zealand Geological Survey, DSIR, Lower Hutt, NZ, Personal Communication.
Smith, W.D. and Berryman, K.R., "Revised Estimates of Earthquake Hazard in New Zealand", Bull. NZNSEE, Vol. 16, No. 4, 1983, pp.259-272.
Peek, R., Berrill, J.B. and Davis, R.O., "A Seismicity Model for New Zealand", Bull. NZNSEE, Vol. 13, No. 4, 1980, pp.355-364.
Mulholland, W.M., "Estimation of Design Earthquake Motion for New Zealand", Report No. 82/9, Dept. of Civil Engineering, University of Canterbury, NZ, 1982.
Berrill, J.B., "Seismic Hazard Analysis and Design Loads", Bull, of the NZNSEE, Vol. 18, No. 2, June 1985.
NZS 3101:1982, New Zealand Standard Code of Practice for Design of Concrete Structures, Parts 1 and 2, Standards Association of New Zealand, Wellington, 1982.
Copyright (c) 1986 D. D. Spurr
This work is licensed under a Creative Commons Attribution 4.0 International License.