Deep foundation design in the new Ontario Highway Bridge Design Code: Reply

1984 ◽  
Vol 21 (3) ◽  
pp. 599-600
Author(s):  
B. H. Fellenius ◽  
G. G. Meyerhof
Keyword(s):  
Highway Bridge ◽  
Design Code ◽  
Bridge Design ◽  
Foundation Design ◽  
Deep Foundation

Deep foundation design in the new Ontario Highway Bridge Design Code: Discussion

1983 ◽  
Vol 20 (4) ◽  
pp. 858-859
Author(s):  
Baidar Bakht ◽  
Leslie G. Jaeger ◽  
Roger A. Dorton
Keyword(s):  
Highway Bridge ◽  
Design Code ◽  
Bridge Design ◽  
Foundation Design ◽  
Deep Foundation

Deep foundation design in the new Ontario Highway Bridge Design Code

1983 ◽  
Vol 20 (1) ◽  
pp. 173-176
Author(s):  
Bengt H. Fellenius ◽  
Geoffry G. Meyerhof
Keyword(s):  
Dynamic Monitoring ◽  
Pile Groups ◽  
Design Code ◽  
Bridge Design ◽  
Limit States ◽  
Foundation Design ◽  
Deep Foundation ◽  
Capacity Limit ◽  
Load Tests ◽  
High Level

A review is presented of some aspects of deep foundation design in the new Ministry of Transportation and Communications of Ontario, ultimate limit states Bridge Design Code. The design of axial pile capacity distinguishes between structural capacity limit and geotechnical capacity limit. The geotechnical capacity of a driven pile is governed by the dynamic impedance of the pile cross section. Higher geotechnical capacity, for instance due to soil setup, can only be utilized if proven to exist. Different capacity modification factors are used for routine load tests and high level test loading. Modern methods of dynamic monitoring are included and capacity determination by such methods is accepted as equivalent to determination from routine load tests. Lateral capacity of single piles and group piles, downdrag, and inclined loading of pile groups are considered, as are details such as splicing and use of pile shoes. Pile spacing is given as a function of expected pile length.

Equivalent area of voided slabs

1998 ◽  
Vol 25 (4) ◽  
pp. 797-801 ◽  
Author(s):  
Leslie G Jaeger ◽  
Baidar Bakht ◽  
Gamil Tadros
Keyword(s):  
Simple Expression ◽  
Technical Note ◽  
Axial Stiffness ◽  
Highway Bridge ◽  
Slab Thickness ◽  
Design Code ◽  
Bridge Design ◽  
Equivalent Thickness ◽  
Simple Alternative ◽  
Equivalent Area

In order to calculate prestress losses in the transverse prestressing of voided concrete slabs, it is sometimes convenient to estimate the thickness of an equivalent solid slab. The Ontario Highway Bridge Design Code, as well as the forthcoming Canadian Highway Bridge Design Code, specifies a simple expression for calculating this equivalent thickness. This expression is reviewed in this technical note, and a simple alternative expression, believed to be more accurate, is proposed, along with its derivation. It is shown that the equivalent solid slab thickness obtained from consideration of in-plane forces is also applicable to transverse shear deformations, provided that the usual approximations of elementary strength of materials are used in both cases.Key words: axial stiffness, equivalent area, shear deformation, transverse prestressing, voided slab, slab.

Dynamic loading and testing of bridges in Ontario

1984 ◽  
Vol 11 (4) ◽  
pp. 833-843 ◽  
Author(s):  
J. R. Billing
Keyword(s):  
Dynamic Load ◽  
Dynamic Testing ◽  
Highway Bridge ◽  
Vibration Modes ◽  
Design Codes ◽  
Test Results ◽  
Design Code ◽  
Bridge Design ◽  
Strain Measurements ◽  
Bridge Testing

The Ontario Highway Bridge Design Code (OHBDC) contains provisions on dynamic load and vibration that are substantially different from other codes. Dynamic testing of 27 bridges of various configurations, of steel, timber, and concrete construction, and with spans from 5 to 122 m was therefore undertaken to obtain comprehensive data to support OHBDC provisions. Standardized instrumentation, data acquisition, and test and data processing procedures were used for all bridge tests. Data was gathered from passing trucks, and scheduled runs by test vehicles of various weights. Accelerometer responses were used to determine bridge vibration modes, and dynamic amplifications were obtained from displacement or strain measurements. The form of the provisions adopted for dynamic load and vibration was confirmed by the test results, subject to minor adjustment of values. Observations on the distribution of dynamic load, and its relationship to span length and vehicle weight, may provide a basis for future refinement of the dynamic load provisions. If the stiffness of curbs and barrier walls is not included in deflection calculations, bridges designed by deflection could be penalized. Key words: bridges, vibration, bridge testing, bridge design codes.

Corrigendum: Reliability-based geotechnical design in 2014 Canadian Highway Bridge Design Code

2017 ◽  
Vol 54 (10) ◽  
pp. 1521-1521
Author(s):  
Gordon A. Fenton ◽  
Farzaneh Naghibi ◽  
David Dundas ◽  
Richard J. Bathurst ◽  
D.V. Griffiths
Keyword(s):  
Highway Bridge ◽  
Design Code ◽  
Bridge Design ◽  
Geotechnical Design
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