Economical design for long-span soil – metal structures

1996 ◽  
Vol 23 (4) ◽  
pp. 838-849 ◽  
Author(s):  
Hesham Mohammed ◽  
John B. Kennedy
Keyword(s):  
Dimensional Analysis ◽  
Structural Engineering ◽  
Three Dimensional ◽  
Metal Structure ◽  
Reinforced Soil ◽  
Soil System ◽  
Metal Structures ◽  
Long Span ◽  
Economical Design ◽  
Soil Metal

Soil – metal structures consisting of metal conduits covered with soil have been used extensively for short-span bridges. Recently, some designers ventured into utilizing them for longer spans with shallow soil cover which has led to some failures. Long-span soil – metal structures are often designed with transverse stiffeners attached to the metal structure. Another approach is the use of a reinforced-soil system in which the surrounding soil is reinforced and the metal conduit is tied into the soil. In this paper, a three-dimensional analysis of long-span soil – metal structures is carried out using these two approaches. The analysis is verified and substantiated by results from laboratory models. The structural responses from the two designs show that the latter design approach leads to a more economical structure. A design example based on the Cheese Factory Bridge built in Ontario in 1984 is presented. Key words: bridges, design, long span, reinforced soil, soil – metal structures, structural engineering, three-dimensional analysis.

Long-Span Reinforced Steel Box Culverts

1998 ◽  
Vol 1624 (1) ◽  
pp. 184-195 ◽  
Author(s):  
Thomas C. McCavour ◽  
Peter M. Byrne ◽  
Timothy D. Morrison
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Plate Thickness ◽  
Metal Structure ◽  
Element Model ◽  
Structure Interaction ◽  
Long Span ◽  
Box Culverts ◽  
Reinforced Steel ◽  
Soil Metal

A comprehensive investigation of soil–metal structure interaction for long-span deep-corrugated reinforced steel box culverts was carried out in a project sponsored by the National Research Council of Canada in 1996. Two 12-m span box culverts were erected at a Dorchester, New Brunswick, test site using two backfill densities, one structural steel plate thickness, and a minimum cover of 300 mm. These structures are the largest steel box culverts erected to date. One structure was reinforced using continuous deep-corrugated crown stiffeners, and the other was intermittently reinforced using composite concrete metal-encased stiffeners. Strain and deflection of the structure were monitored in response to static axle loads positioned at six locations on the test surface. A finite element model was then used in numerical simulations of the soil–metal structure system. The measured culvert response was then compared with results from the finite element model. A nonlinear soil-structure interaction program (NLSSIP) was used to analyze the two long-span box culverts. NLSSIP was developed specifically for long-span soil–metal culverts and has been used for structures with and without stiffeners. The box culvert test provided a definitive relationship between soil stiffness and metal structure stiffness. The test was the first that evaluated intermittently reinforced composite concrete metal-encased stiffeners relative to conventional continuous reinforcement. The performance of the two types of stiffeners is evaluated and recommendations are made for future design and installation of long-span deep-corrugated steel box culverts.

Reinforced Soil‐Metal Structures

1988 ◽  
Vol 114 (6) ◽  
pp. 1372-1389
Author(s):  
John B. Kennedy ◽  
Jan T. Laba ◽  
H. Shaheen
Keyword(s):  
Reinforced Soil ◽  
Metal Structures ◽  
Soil Metal

Response of Long‐Span Soil‐Metal Structures

1993 ◽  
Vol 119 (2) ◽  
pp. 558-572 ◽  
Author(s):  
Hesham Mohammed ◽  
John B. Kennedy
Keyword(s):  
Metal Structures ◽  
Long Span ◽  
Soil Metal

Simplified Analysis of Long-Span Soil-Metal Structures

1995 ◽  
Vol 121 (10) ◽  
pp. 1463-1470 ◽  
Author(s):  
Hesham Mohammed ◽  
John B. Kennedy
Keyword(s):  
Metal Structures ◽  
Long Span ◽  
Simplified Analysis ◽  
Soil Metal

scholarly journals STRUCTURAL SAFETY ANALYSIS OF STADIUMS FOR THE 2018 FIFA WORLD CUP IN RUSSIA. FORMULATION OF PROBLEMS OF STRUCTURAL ANALYSIS

2018 ◽  
Vol 14 (1) ◽  
pp. 14-25
Author(s):  
Alexander M. Belostotsky ◽  
Alexander I. Nagibovich
Keyword(s):  
Structural Analysis ◽  
Three Dimensional ◽  
Safety Analysis ◽  
Structural Safety ◽  
World Cup ◽  
Fifa World Cup ◽  
Metal Structures ◽  
Long Span ◽  
Football Stadiums ◽  
Formulation Of Problems

The article presents structural safety analysis of the three-dimensional long-span systems “ground base – reinforced concrete foundation structures and stands - metal structures of the coating and facades” of football stadiums for the 2018 World Cup in Russia with basic and special combinations of loads and formulation problems of future in-vestigations.

In situ investigation of the primary recrystallization of alpha titanium in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 634-635
Author(s):  
S. Naka ◽  
R. Penelle ◽  
R. Valle
Keyword(s):  
Dimensional Analysis ◽  
Texture Evolution ◽  
Cold Work ◽  
Three Dimensional ◽  
Primary Recrystallization ◽  
Thin Foils ◽  
In Situ Investigation ◽  
Grain Growth Model ◽  
Alpha Titanium

The in situ experimentation technique in HVEM seems to be particularly suitable to clarify the processes involved in recrystallization. The material under investigation was unidirectionally cold-rolled titanium of commercial purity. The problem was approached in two different ways. The three-dimensional analysis of textures was used to describe the texture evolution during the primary recrystallization. Observations of bulk-annealed specimens or thin foils annealed in the microscope were also made in order to provide information concerning the mechanisms involved in the formation of new grains. In contrast to the already published work on titanium, this investigation takes into consideration different values of the cold-work ratio, the temperature and the annealing time.Two different models are commonly used to explain the recrystallization textures i.e. the selective grain growth model (Beck) or the oriented nucleation model (Burgers). The three-dimensional analysis of both the rolling and recrystallization textures was performed to identify the mechanismsl involved in the recrystallization of titanium.

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