CE 3150 - Reinforced Concrete Design (Fall 2010) …robermat/CEE3150/hw/Homework 08.pdfCE 3150 -...
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CE 3150 - Reinforced Concrete Design (Fall 2010) Homework Assignment 08 Topics: Column Design, Detailing of Confinement Use the given loads and properties for all problems: f c ’ = 5 ksi grade 60 bars Estimate #3 size ties and spirals with exterior exposure. Do not use vertical bars larger than #10 size. Choose the smallest column possible while keeping ρ no greater than 2.5% and dimensions at 2” increments. 1. Problem 1 Design a square, tied column to hold the given loads. (a) Use the normalized interaction diagram spreadsheet supplied on D2L to size the column and determine the required amount of reinforcement. (b) Select bars and determine the locations of the reinforcement in the column cross-section. Then check the column using the interaction diagram spreadsheet on D2L. Enter the chosen layout of bars and design loads and verify that the column has adequate capacity. If it does not, change the bar selection or column size until the column has enough capacity. (c) Detail the ties. Determine what the required spacing is and whether interior cross-ties are needed. The final design must satisfy clear space and cover requirements for columns. Draw a picture of your final column design. 2. Problem 2 Design a circular, spiral column to hold the given loads. (a) Use the normalized interaction diagram spreadsheet supplied on D2L to size the column and determine the required amount of reinforcement. (b) Select bars and determine the locations of the reinforcement in the column cross-section. Then check the column using the interaction diagram spreadsheet on D2L. Enter the chosen layout of bars and design loads and verify that the column has adequate capacity. If it does not, change the bar selection or column size until the column has enough capacity. (c) Detail the spiral. Verify that clear space and cover dimensions are satisfied. Determine what the required pitch is and verify that it is within the ACI restrictions. Draw a picture of your final column design. P U (kip) M U (kip*ft) 2000 50 1400 200 1000 300 700 400 500 500 200 650
Transcript of CE 3150 - Reinforced Concrete Design (Fall 2010) …robermat/CEE3150/hw/Homework 08.pdfCE 3150 -...
CE 3150 - Reinforced Concrete Design (Fall 2010)
Homework Assignment 08 Topics: Column Design, Detailing of Confinement Use the given loads and properties for all problems:
fc’ = 5 ksi grade 60 bars Estimate #3 size ties and spirals with exterior exposure. Do not use vertical bars larger than #10 size. Choose the smallest column possible while keeping ρ no greater than 2.5% and dimensions at 2” increments.
1. Problem 1
Design a square, tied column to hold the given loads. (a) Use the normalized interaction diagram spreadsheet supplied on D2L to size
the column and determine the required amount of reinforcement.
(b) Select bars and determine the locations of the reinforcement in the column cross-section. Then check the column using the interaction diagram spreadsheet on D2L. Enter the chosen layout of bars and design loads and verify that the column has adequate capacity. If it does not, change the bar selection or column size until the column has enough capacity.
(c) Detail the ties. Determine what the required spacing is and whether interior
cross-ties are needed. The final design must satisfy clear space and cover requirements for columns. Draw a picture of your final column design.
2. Problem 2
Design a circular, spiral column to hold the given loads. (a) Use the normalized interaction diagram spreadsheet supplied on D2L to size
the column and determine the required amount of reinforcement.
(b) Select bars and determine the locations of the reinforcement in the column cross-section. Then check the column using the interaction diagram spreadsheet on D2L. Enter the chosen layout of bars and design loads and verify that the column has adequate capacity. If it does not, change the bar selection or column size until the column has enough capacity.
(c) Detail the spiral. Verify that clear space and cover dimensions are satisfied.
Determine what the required pitch is and verify that it is within the ACI restrictions. Draw a picture of your final column design.
PU (kip)
MU (kip*ft)
2000 50 1400 200 1000 300 700 400 500 500 200 650
