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ASCE 26 97 1997

ASCE 26 97 1997

$31.96

ASCE Standard 26 Standard Practice for Direct Design of Buried Precast Concrete Box Sections

Published By Publication Date Number of Pages
ASCE 1997 52
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This Standard covers the direct design of buried one-cell precast reinforced concrete box sections for the conveyance of sewage, industrial wastes, storm water and drainage, and to serve as tunnels. The design and analysis method accounts for the interaction between the box sections and soil envelope in calculating loads, pressure distributions, moment, thrust and shear in the box section, and includes a procedure for calculating the required reinforcement. Load effects are determined separately for each loading. The structural design of one-cell precast reinforced concrete box sections is based on a limits state design procedure that accounts for strength and serviceability criteria and is consistent with the procedures outlined in Section 17 of the AASHTO Standard Specification for Highway Bridges. The design criteria include: structural aspects, such as flexure, thrust, and shear strengths; handling and installation; fatigue limits; and crack width control. The design of a one-cell precast reinforced concrete box section is based on the assumption that specified design bedding and installation requirements will be achieved during construction of the installation. Owners and ownersýýý engineers will find this Standard useful in preparing contract documents based on the direct design method.

PDF Catalog

PDF Pages PDF Title
13 C 18.0 Leveling Course
C 18.0 Leveling Course
15 3.4 1 Box sectionlinstallation terminology
3.4 1 Box sectionlinstallation terminology
17 6.0 General
6.0 General
7.0 General Design Requirements
7.0 General Design Requirements
8.0 Design Requirements by
8.0 Design Requirements by
9.0 Requirements of Manufa
9.0 Requirements of Manufa
18 10.0 Materials
10.0 Materials
Reinforcement
Reinforcement
Loads Load Combinations and Structural Analysis
Loads Load Combinations and Structural Analysis
Il O
Il O
11.1 Loads
11.1 Loads
11.1.1 Dead Loads
11.1.1 Dead Loads
19 Live Loads
Live Loads
1 1.2 Load Applications f
1 1.2 Load Applications f
11 2.3 Load Case 1: Box Section
11 2.3 Load Case 1: Box Section
Load Case 2: Vertical Soil Load
Load Case 2: Vertical Soil Load
1 1 – 1 AASHTO impact factors
1 1 – 1 AASHTO impact factors
11-2 Load cases
11-2 Load cases
20 1 I- 1 Load cases
1 I- 1 Load cases
21 Load Cases 3 and 4: Lateral Soil Loads
Load Cases 3 and 4: Lateral Soil Loads
Load Case 5: Internal Fluid Weight
Load Case 5: Internal Fluid Weight
Load Case 6: Uniform Highway Railroad or Aircraft Load
Load Case 6: Uniform Highway Railroad or Aircraft Load
Load Case 7: Non-Uniform Highway Railroad or Aircraft Load
Load Case 7: Non-Uniform Highway Railroad or Aircraft Load
Load Case 8: Approaching Highway Railroad or Aircraft Load
Load Case 8: Approaching Highway Railroad or Aircraft Load
Intermittent Internal Fluid Pressure Load
Intermittent Internal Fluid Pressure Load
Highway Load Distribution through Earth Cove
Highway Load Distribution through Earth Cove
22 11-2 Coefficient C,,-load coefficient for trench installations
11-2 Coefficient C,,-load coefficient for trench installations
23 11-3 AASHTO live loads
11-3 AASHTO live loads
Earth pressure distribution area at depth of earth cover
Earth pressure distribution area at depth of earth cover
24 AASHTO tire contact area for HS20 dual wheels
AASHTO tire contact area for HS20 dual wheels
Additional distribution of effective earth pressure due to longitud
Additional distribution of effective earth pressure due to longitud
25 11.2.14 Railroad Load Distribution through Ballast and
11.2.14 Railroad Load Distribution through Ballast and
Aircraft Load Distribution through Pavement and Earth
Aircraft Load Distribution through Pavement and Earth
1.3 Structural Analysis
1.3 Structural Analysis
Assumptions for Analysis
Assumptions for Analysis
11.3.3 Combined Effects of Stress Resultants
11.3.3 Combined Effects of Stress Resultants
13.0 Reinforcement
13.0 Reinforcement
12.1 Reinforcement Details
12.1 Reinforcement Details
Reinforcement Design
Reinforcement Design
26 Typical box section reinforcement layoii
Typical box section reinforcement layoii
27 Reinforcement placement at ends of box when As7 and As8 cages are used
Reinforcement placement at ends of box when As7 and As8 cages are used
Reinforcement placement at ends of box when As7 and As8 cages are not used
Reinforcement placement at ends of box when As7 and As8 cages are not used
28 Maximum Flexural Reinforcement Limited by Concrete Compression
Maximum Flexural Reinforcement Limited by Concrete Compression
12.2.4 Crack Control
12.2.4 Crack Control
Typical box section joint (top slab shown)
Typical box section joint (top slab shown)
12-1 Crack contr
12-1 Crack contr
29 12.2.5 Shear Strength (Diagonal Tension)
12.2.5 Shear Strength (Diagonal Tension)
30 12.2.6 Stirrups
12.2.6 Stirrups
12.2.7 Welds Splices and Development of Reinforcement
12.2.7 Welds Splices and Development of Reinforcement
12.3.2 Minimum Area of Distribution Reinforcement
12.3.2 Minimum Area of Distribution Reinforcement
32 13.0 General
13.0 General
14.0 Working Drawings an ing
14.0 Working Drawings an ing
15.0 Safety
15.0 Safety
Excavation
Excavation
33 Foundation
Foundation
Leveling Course
Leveling Course
Box Section Placement a
Box Section Placement a
34 Sidefill
Sidefill
Overfill
Overfill
Sheathing Removal and Trench Shield Advancement
Sheathing Removal and Trench Shield Advancement
Precast Concrete Appurtenances
Precast Concrete Appurtenances
Miniinurn Cover for Construction Loads
Miniinurn Cover for Construction Loads
35 A1.O Scope
A1.O Scope
A2.0 Standard Practice-SI Conversions
A2.0 Standard Practice-SI Conversions
4.0 Notations
4.0 Notations
36 12.0 Reinforcement
12.0 Reinforcement
12 I Reinforceme
12 I Reinforceme
37 12.2 Reinforcement Design
12.2 Reinforcement Design
38 12.3 Distribution Reinlorcement
12.3 Distribution Reinlorcement
39 12.4 Fatigue Limit
12.4 Fatigue Limit
40 C1.0 Scope
C1.0 Scope
C3.0 Definitions
C3.0 Definitions
C4.0 Notations
C4.0 Notations
41 211.0 Lo
211.0 Lo
42 212.0 Re
212.0 Re
43 C20.0 Sidefill
C20.0 Sidefill
C21.0 Overfill
C21.0 Overfill
45 INDEX
INDEX

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ASCE 26 97 1997
$31.96