The National Academies Press

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From page 6... ... For example, two or more groups may be defined to represent independent structures in the same embankment. Alternatively, several element groups may be joined together to model cell-like structures or composite structures such as a corrugated metal arch roof placed on a reinforced concrete U-shaped base or a plastic pipe placed inside a corrugated steel pipe for rehabilitation. Read the entire page →
From page 7... ... The traditional batch-mode method of input requires the user to hand type the CANDE input document via an ASCII text editor in accordance with the written input instructions in the user manual. In contrast, the GUI is much easier to use because each input command is represented by an input menu that is "tailor-made" to conform to the user's previous input choices. Read the entire page →
From page 8... ... Once the key input parameters are provided, a CANDE input document is generated and the user is provided an input menu browser to navigate and modify the input as necessary. The key features of the input menu browser are detailed in Figure 4. Read the entire page →
From page 9... ... Figure 4. CANDE input menu overview. Read the entire page →
From page 10... ... • Mesh Plot. The mesh plot is an interactive plotting tool for creating and viewing the finite element mesh topology (Levels 2 and 3) Read the entire page →
From page 11... ... CANDE mesh plot options. Read the entire page →
From page 12... ... Listed below are the design criteria for the three major categories of pipe materials with emphasis on the new design criteria developed under this research effort. Read the entire page →
From page 13... ... All thermoplastic pipe materials have the same general design criteria, differing only in pipe material data and duration of loading. Strength-related design criteria include thrust stress limits for material failure and global buckling, and maximum outer fiber strain limits from thrust and bending. Read the entire page →
From page 14... ... The problem is shown schematically in Figure 9. The problem employs Solution Level 2, using an automated finite element pipe mesh for a trench installation Read the entire page →
From page 15... ... The analysis will be with Level 2, using an autom ated finite elem ent arch me sh for a trench installation having interface elements. The automated finite element mesh will be modified using Level 2-extended to apply p oint loads depicting a LRFD design truck at the ground surface above the crown of the arch. Read the entire page →
From page 16... ... x 84 in. reinforced concrete box culvert with standard ASTM steel placem ent with 2 ft of fill over the top of the culvert using LRFD analysis. Read the entire page →
From page 17... ... In situ Hard clay 6,000 0.35 120 Bedding Compacted sand 2,600 0.19 120 Backfill in trench Compacted sand 2,600 0.19 120 Overfill above trench Lightly compacted silt 800 0.23 120 Figure 9. Illustration of Tutorial Example #4 with soil zone properties. Read the entire page →
From page 18... ... 18 Figure 10. Soil construction increments for Tutorial Example #4 from GUI. Read the entire page →
From page 19... ... 19 Figure 11. Design solutions for Tutorial Example #4. Read the entire page →
From page 20... ... 20 Figure 12. Final evaluation of selected design. Read the entire page →

From page 6...

... For example, two or more groups may be defined to represent independent structures in the same embankment. Alternatively, several element groups may be joined together to model cell-like structures or composite structures such as a corrugated metal arch roof placed on a reinforced concrete U-shaped base or a plastic pipe placed inside a corrugated steel pipe for rehabilitation.