Please help me this reinforced concrete project Reinforced Concrete Design Proje

Question

Please help me this reinforced concrete project Reinforced Concrete Design Project: Three S Story Office Building building This course project deals with the structural design of a three-story reinforced concrete office following ACI 318-14. The structure system of the office building is a reinforced concrete frame with a one-way slab and beam floor system. The framing plan of the three-story reinforced concrete building is shown below in the framing plan. The building is six bays by three bays. The first story height of the building is 16 feet while the other two story heights are 12 feet each. to ACI 318-14 Your final report should include (1) calculations; (2) Elevations and sections; and (3) reinforcement detailing. Design process should cover: one-way slab, T-beam for both flexural and shear, check crack control and deflections, and columns' design. Show figures to display the placement of the steel rebar in the structure Given: c= 4 ksi and fy = 60 ksi Loads: (using ASCE 7 and the load combinations from ACI 318) Roof: (a) Dead Loads for the roof: load from the mechanical equipment and the ceiling (15 psf), the load from the roofing material (7 psf) and load from the weight of the slab (87.5 psf); (b) Live load for the roof: snow load only (30 psf). Floor: Dead loads for the floor: load from the mechanical equipment and the ceiling (15 psf), and the load from the slab (87.5 psf); (b) Live load for the floors: 50 psf live load plus partition loading (which also considered a live load) of 20 psf. (a) Roof Load Calculation Un-factored Loads (psO Load Factor Factored Loads (pst Snow Roofing Material 30 1.6 1.2 1.2 48 8.4 18 15 Total 179.4 Floor Load Calculation Un-factored Loads (ps Load Factor Factored Loads (pst 50 15 20 S7.5 Live Load 1.6 80 18 Partitions Slab (7") 1.6 Total 235

Explanation / Answer

Step 1:

The important components in residential buildings are

1. Beam

2. Column

3. Slab

Here slab is divided in to

1. one way slab

2. Two way slab

In one way slab category ratio between two diffent lengths of beam is greater than two,

For example in the given structure

Consider slabs between grids A1, A2 and B1, B2

Here, lateral dimension of the slab = 14'

longitudinal dimension of the slab = 25'

Ratio between longitudial and lateral = ( 25 / 14 ) = 1.78 < 2 , two way slab

For grids A2, A3 and B2,B3,

Ratio between longitudinal and lateral = ( 30 / 14 ) = 2.14 > 2 , one way slab.

Step 2:

Slab design :

For the design of slab we considered one way slab as a beam with a width of one meter ,

for that we have to calculate moment about the top layer

Mu = 0.87 * fy * Ast * Effective depth

From the above equation we can calculate the required area of steel, without using any code,

Initially we can assume that effective depth = clear span / 32.

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