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E-ISSN: 1753-7789

Volume 85, Issue 2, June 1988

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STATIC ANALYSIS OF DOUBLE-PLANE CABLE-STAYED BRIDGES.
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- pp. 207–222
- Author: H I A HEGAB
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.127
- Proc. Instn Ciu. Engrs, Part 2,1988,85, June, 207-222 PAPER 9247 STRUCTURAL ENGINEERING GROUP Static analysis of double-plane cable-stayed bridges H. I. A. HEGAB, BSc, MSc, PhD* A new method for the torsional analysis of cable-stayed bridges is presented. The method is based on the potential energy of the stayed deck, and the solution is obtained through an iterative procedure. The iterative procedure is reasonably convergent, and the use of only a small number of Fourier terms is sufficient...
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APPROXIMATE SPECTRAL MULTIPLE SUPPORT SEISMIC ANALYSIS: TRAVELLING WAVE APPROACH.
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- pp. 223–236
- Authors: A RUTENBERG; AC HEIDEBRECHT
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.128
- Proc. Instn Ciu. Engrs, Part 2,1988,85, June, 223-236 PAPER 9258 STRUCTURAL ENGINEERING GROUP Approximate spectral multiple support seismic analysis:travelling wave approach A. RUTENBERG, BSc, MSc, DSc* A. C. HEIDEBRECHT, BSc, MS, PhD7 Introduction It is now recognized that spatial variations in the earthquake ground motion under the supports should be considered in the seismic response analysis of bridges and other structures of large dimensions.' These variations lead to differential displacements of adjacent bridge piers, which, in turn, result in a response which may differ appreciably from that of standard analysis where all bridge supports are assumed to move equally and in phase...
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WAVE GROUPING AND HARBOUR DESIGN.
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- pp. 237–258
- Author: EC BOWERS
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.129
- Pror. Instn Civ. Engrs, Part 2, 1988,85, June, 237-258 PAPER 9266 ENGINEERING GROUP MARITIME Wave grouping and harbour design E. C . BOWERS, PhD, DIC* Residual disturbances in harbours, associated with wave grouping, are discussed. The main source of energy is identified as setdown beneath wave groups, and data are provided which showtheexistence of set-downin the realsea;theimplicationsforwavegenerationin A at physical models are considered. self-consistent statistical description for responses wave group periods is presented. This starts with a random sea in which the ordinary waves are assumed to consist of a superposition of wavecomponentswithrandomphases...
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PREDICTION OF CRACK WIDTHS IN CIRCULAR VOIDED CONCRETE SLABS SUBJECTED TO LONGITUDINAL BENDING.
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- pp. 259–270
- Authors: TOS ODUYEMI; LA CLARK
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.130
- Proc. Instn Ciu. Engrs, Part 2,1988,85, June, 259-270 PAPER 9303 STRUCTURAL ENGINEERING GROUP Prediction of crack widths in circular voided concrete slabs subjected to longitudinal bending T. 0.S . ODUYEMI, BSc, PhD* L. A. CLARK, BEng, PhD, MICE, FIStructE* A method of predicting crack widths due tolongitudinal bending of voided slabs is proposed and checked against data from tests on fifteen 1 : 3.33 scale model longitudinal strips of voided slabs. It is found that the distribution of crack widths over a bar is less skewed in a voided slab than in a solid slab...
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CONCENTRATED LOADS ON SOLID MASONRY WALLS - A PARAMETRIC STUDY AND DES IGN RECOMMENDATIONS.
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- pp. 271–289
- Authors: S ALI; AW PAGE
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.131
- Proc. Znstn Ciu. Engrs, Part 2,1988,85, June, 271-289 PAPER 9313 STRUCTURAL ENGINEERING GROUP Concentrated loads onsolid masonry walls-a parametric study and design recommendations S . ALI, BE, MSc(Eng),PhD* A. W.PAGE, ASTC, BE, PhD, MIE(Aust)* The strengthof solid masonary walls subjected to concentrated loads is studied, using a finite element model to simulate wall behaviour. The finite element model is able to reproduce the non-linear deformation characteristics of the bricks and mortar as well as local failure in both bricks and joints...
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SYMMETRIC PLANE STRAIN FLEXURE OF A FINITE STRIP FOUNDATION UNDER MOME NT LOADING.
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- pp. 291–303
- Author: JA HEMSLEY
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.132
- Proc. Insm Ciu. Engrs, Part 2,1988,85, June,291-303 INEERINGPAPER CTURAL 9320 GROUP Symmetric plane strain flexure a finite of strip foundationunder moment loading J. A. HEMSLEY, MEng, PhD, DIC, MICE, MIStructE* An earlier integral equation solution for the symmetric elastostatic flexure of a vertically loaded strip foundation of finite width in frictionless continuous contact with a homoand geneous half-space is extended to include applied moment loading. The edges strip are of the unrestrained, and exact solutions to the governing Fredholm equation are obtained in terms of Chebyshev polynomials...
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EARLY THERMAL CRACKING IN END-RESTRAINED THICK REINFORCED CONCRETE MEM BERS.
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- pp. 305–315
- Authors: BP HUGHES; AT MAHMOOD
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.133
- Proc. Instn Ciu. Enyrs, Part 2,1988,85, June, 305-315 PAPER 9321 STRUCTURAL ENGINEERING GROUP Early thermal cracking in end-restrained thick reinforced concrete members B. P. HUGHES, DSc, PhD, FIStructE, MICE* A. T. MAHMOOD, BSc, PhD? Five reinforced concrete members, with thick cross-sections and restrained at the ends only, have been examined to investigate the behaviour of massive concrete members subjected to severe weather conditions at early ages. An experimental investigation is described in which site conditions which cause severe crack mechanisms in fully restrained sections were carefully reproduced in thelaboratory...
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PORTLAND-PULVERIZED FUEL ASH CONCRETES: WATER DEMAND, 28 DAY STRENGTH, MIX DESIGN AND STRENGTH DEVELOPMENT.
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- pp. 317–331
- Authors: DW HOBBS; BCA
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.134
- Proc. Instn Ciu. Engrs, Part 2,1988,85, June, 317-331 UCTURAL PAPER GINEERING 9322 GROUP Portland-pulverized fuel ash concretes : water demand, 28 day strength, mix design and strength development D. W. HOBBS, BSc, PhD, CPhys, FInstP* Compressive strength results are reported for a range of ordinary Portland cement (OPC) concretes and Portland-pulverized fuel ash (pfa) concretes. In the casea concrete containof ing a BS 3892: part 1 pfa, it is shown that 28 day strength and a slump parity with OPC concrete,withacementcontent in therange 275-350 kg/m3canoften be achieved by increasingthetotalbindercontent by approximately one half of thepercentage of pfa employed and by reducing the waterbinder ratio by approximately two-thirds of the percentage of pfa employed, the actual changes depending on the particular combination of Portland cement and pfa...
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AUTOMATED DETERMINATION OF CONCORDANT PROFILES.
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- pp. 333–352
- Author: CJ BURGOYNE
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.135
- Proc. InstRCiv. Engrs, Part 2,1988,85, June, 333-352 PAPER 9328 STRUCTURAL ENGINEERING GROUP Automated determination of concordant profiles C . J. BURGOYNE, MA, PhD, DIC, MICE* The Paper presents a method by which a designer can automatically determine a concordant cable profile that fits within eccentricity bounds governed by the applied moment envelopes. The method works by determining loadings which cause peak bending moments at a particular point; these moment diagrams are scaled concordant profiles. By using an iterative method, these loadings can be combined to give a composite notional loading; the corresponding bending moment, when scaled by an arbitrary factor, is the final concordant cable profile...
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SYNOPSIS OF TN 508. A CASE FOR INCLUSION OF INDIVIDUAL WAVEHEIGHT MODE LLING IN SPECIFICATIONS OF THE OFFSHORE ENVIRONMENT.
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- pp. 353
- Author: R BURROWS
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.136
- Proc. Instn Civ. Engrs, Part 2, 1988,85, June, 353 SYNOPSIS OF TN 508 MARITIME ENGINEERING GROUP A case for inclusion of individual waveheight modelling in specifications of the offshore environment R. BURROWS, BEng, PhD, MICE* Engineering design of offshore installations calls for the prediction of extreme waveheights for the purposes of first excursion failure analysis, together with the likely number of occurrences of a rangeof lower heights fatigue analysis. for 2. The current practice adoptedfor solution of this problem makes little use of an existing individual waveheight model which predicts the distribution of the population of different waveheightswhich make up the complete long-term wave climate...
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DISCUSSION. ESTIMATION OF DILUTION IN BUOYANT EFFLUENTS DISCHARGED INTO A CURRENT.
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- pp. 355
- Authors: JJ SHARP; E MOORE; PJD NEVILLE JONES; PJDN JONES
- Document Type: Discussion
- DOI: 10.1680/iicep.1988.137
- Proc. Instn Cio. Engrs, Part 2,1988,85, June, 355 DISCUSSION ON PAPER 9107 WATER ENGINEERING GROUP Estimation of dilution in buoyant effluents discharged into a current J. J. Sharp andE. Moore Mr P.J. D. Neville-Jones, Binnie and Partners Professor Sharp's review of initial dilution prediction methods is most interesting. The fact that so many theories fit the various data is testimony to the wide scatter in measured dilutions. While leading the WRC Engineering Sea Outfall Research Project we undertooka similar study of the American and UK prediction methods...
AIRBORNE MULTISPECTRAL SCANNER DATA FOR ESTIMATION OF DYE DISPERSION F ROM SEA OUTFALLS. DISCUSSION ON PAPER 9129.
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- pp. 357–358
- Authors: PJ CURRAN; G THOMPSON
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.141
- Proc. Instn Ciu. Engrs, Part 2, 1988,85, June, 357-358 DISCUSSION ON PAPER 9129 WATER ENGINEERING GROUP Airborne multispectral scanner for data estimation of dye dispersion from outfalls sea P. J. Curran Mr G. Thompson, Binnie and Partners Dr Curran presents what appears to be a very promising technique for evaluating the dilution and dispersion of emuent, to a degree that has not been possible with previous techniques of either direct or remote measurement. There are, however, several points that emerge from this Paper that need further consideration...
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BEHAVIOUR OF TURBULENT WATER JETS IN THE ATMOSPHERE AND IN PLUNGE POOL S. DISCUSSION ON PAPER 9136.
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- pp. 359–363
- Authors: DA ERVINE; HT HALVEY; JW HOYT; JJ TAYLOR
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.142
- Proc. lnstn Ciu. Engrs, Part 2,1988,85, Mar., June, 359-363 DISCUSSION ON PAPER 9136 WATER ENGINEERING GROUP Behaviour of turbulent waterjets in the atmosphere and in plunge pools D. A. Ervine and H. T. Falvey Dr J. W. Hoyt, University o Bristol, and Mr J. J. Taylor, Consultant f The Authors provide welcome data on thedispersion characteristics of turbulent jets, including the first measurements available of the axial turbulent fluctuations in water jets. Because water jets are normally opaque when discharging in air, it would be of great interest if the Authors could describe the method by which laser Doppler measurements can be obtained...
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THE EFFECTS OF IMPERFECTIONS ON THE STRENGTH OF COLUMNS WITH SEMI-RIGI D RESTRAINT. DISCUSSION ON PAPER 9182.
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- pp. 363–367
- Authors: SW JONES; PA KIRBY; DA NETHERCOT; J SPRINGFIELD
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.143
- Proc. Instn Ciu. Engrs, Part 2,1988,85,June, 363-367 DISCUSSION ON PAPER 9182 STRUCTURAL ENGINEERING GROUP The effects of imperfections on the strength of columns with semi-rigid end restraint S . W. Jones, P. A. Kirby and D. A. Nethercot Mr J. Springfield (Fellow), Carruthers & Wallace Limited, Toronto (PastChairman of the Structural Stability Research Council (SSRC)and former Chairman of the Task Group on Beam-Columns) If I have interpreted their Paper correctly, the Authors have demonstrated, among other things, that restraint from a semi-rigid connection is such that a column loaded eccentrically at the flange face will have an ultimate capacity greater than that of an identical pin-ended column loaded concentrically...
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FOUNDATION PRESSURES BENEATH RECTANGULAR FOOTINGS. DISCUSSION ON TN 485.
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- pp. 369–370
- Authors: A CSENKI; NR SOMERS
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.144
- Proc. Instn Ciu. Engrs, Part 2,1988,85, June, 369-370 DISCUSSION ON TN 485 STRUCTURAL ENGINEERING GROUP Foundation pressures beneath rectangular footings A. Csenki Mr N. R. Somers (Member) A program codinghas been prepared based on the flow chart given by the Author in the Technical Note. The coding is in Microsoft GW-BASIC 2.0 for use on an Apricot Xi microcomputer. Using the Author's quoted example, the result for the maximum corner pressure is 5.91 kPa which agrees with the result of reference 1...
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ECCENTRIC DISCHARGE IN CIRCULAR SILOS. DISCUSSION ON TN 490.
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- pp. 371–372
- Authors: HM HAYDL; MJ BLACKLER; JGM WOOD
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.145
- Proc. Instn Civ. Engrs, Part 2,1988,85, June, 371-372 DISCUSSION ON TN 490 STRUCTURAL ENGINEERING GROUP Eccentric discharge in circular silos H. M. Haydl Mr M. J. Blackler and Dr G. M. Wood, M o t t , Hay & Anderson, Croydon J. The Author's Technical Note briefly reviews and contrasts current design practice for bending moments in silos subject to eccentric withdrawal. It suggests an alternative method. 22. Dr Haydl seeks to justify his new method of analysis on the basis of comparison with existing Codes or numerical techniques...
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INSTABILITY OF MASONRY ARCHES. DISCUSSION ON PAPER 9149.
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- pp. 373–387
- Authors: N COOKE; MA CRISFIELD; A JENNINGS; O VILNAY; TG HUGHES
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.146
- Proc. Instn Civ. Engrs, Part 2,1988,85, June,373-387 DISCUSSION ON PAPER 9149 STRUCTURAL ENGINEERING GROUP Instability of masonry arches N. Cooke Dr M. A. Crisfield, Transport & Road Research Laboratory* describing both the gross The Author has derived some useful equations ((1H60)) and small deformations of a masonry arch and its associated fill. However, I was surprised by his finding that, as a consequence of gross-deformations, the strength of the arch is increased beyond the load that would be obtained from a conventional work calculation that is based on the initial geometry...
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A COMPUTER SYSTEM FOR FLOOD ESTIMATION AND ITS USE IN EVALUATING THE F LOOD STUDIES RAINFALL RUNOFF METHOD. DISCUSSION ON PAPER 9178.
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- pp. 389–390
- Authors: DR ARCHER; PS KELWAY; DB BOORMAN
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.147
- Proc. Instn Ciu. Engrs, Part 2,1988,85,June, 389-390 DISCUSSION O N PAPER 9178 ENGINEERING MANAGEMENT GROUP A computer system for floodestimation and its use in evaluating the Flood Studies rainfall runoff method D. R.Archer and P. S . Kelway Mr D. B. Boorman, Institute of Hydrology The Paper presents a number of observations resulting from the application of the FSR rainfall runoff method in north-east England, and the Authors suggest ways in which, based on their findings, the method may be improved...
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CORRIGENDUM. TRANSFORMATION OF REGULAR WAVES.
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- pp. 391
- Authors: RH SWIFT; JC DIXON
- Document Type: Research Article
- DOI: 10.1680/iicep.1988.338
- Proc. Instn Cio. Engrs, Part 2,1988,85, June, 391 Corrigendum Transformationof regular waves.R. H. SWIFT and J. C. DIXON. Proc. Znstn Ciu. Engrs, Part 2,1987,83, June, 359-380 Figure 7 of the Paper is incorrectly labelled; a correct versionof this figureis given below. 0.01 0.1 dlL, 1 .o Fig. 7. Dimensionless crest velocity predicted by present method (curues curtailed at stability limits ofmethod) 39 1 ...
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ICE - Institution of Civil Engineers - Virtual Library

ICE Proceedings

Volume 85, Issue 2, June 1988