Design of reinforced concrete structures of multistorey building  course
 Added: 01.07.2014
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ЖБ.doc

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Contents
1. Design Input
2. Assembly Beam Floor Layout
3. Designing a Slab Edge Slab
3.1. Structural solution of slab
3.2. Collecting Loads on Slab
3.3. Defining the Structural and Design Length of a Slab
3.4. Determination of calculation forces
3.5. Selecting Materials for Slab
3.6. Calculation of slab longitudinal edge by normal section (selection
longitudinal working reinforcement)
3.7. Calculation of longitudinal rib for action of transverse force (selection of transverse reinforcement)
3.8. Calculation of slab shelf for local bend
39. Designing a Longitudinal Edge Frame
4. Design of precast reinforced concrete girder
4.1. Structural solution of the crossbar
4.2. Collection of load on the girder
4.3. Defining the Structural and Design Length of the Crossbar
4.4. Determination of calculation forces
4.5. Selection of materials for the crossbar
4.6. Calculation of crossbar by normal section (selection of longitudinal working reinforcement)
4.7. Calculation of crossbar by inclined section (selection of transverse reinforcement)
4.8. Building an Epure of Materials (Finding the Point of Theoretical Breakage of Rods)
4.9. Construction of the frame K1 of the girder
5. Designing a Middle Basement Column
5.1. Determination of forces in the column
5.2. Select Column Materials
5.3. Determination of column bearing capacity (selection of longitudinal working reinforcement)
5.4. Selection of diameter and determination of reinforcement cross bars pitch
5.5. Constructing a Column Frame
6. List of literature
2. construction of prefabricated beam floor
The layout of the structural diagram consists in placing columns and walls of the building in the plan, choosing the layout schemes for the girders and slabs, assigning dimensions to columns, girders and slabs.
For the building, we accept the location of the girders  transverse, the location of the floor slabs  longitudinal.
The size of the columns is taken as 0.4 x 0.4 m.
The dimensions of all elements are taken to an accuracy of 1 cm (if the dimensions are obtained with tenths of a centimeter, then they are rounded to an integer number of centimeters to the lower side).
The length of the girders is selected from the given width of the building, taking into account that their length should be in the range from 5.0 to 6.6 m. Take length of girders lP = 6.1m (3x 6.1 = 18.3m = bzd).
The length of the floor slabs is selected from the given length of the building, taking into account that their length should be in the range from 5.0 to 6.6 m. We accept the length of the floor slabs lpl = 5, 5m (8x5.5 = 44, 0m = lzd).
The width of the floor slabs is selected from the received length of the crossbar, taking into account that their width should be in the range from 1.1 to 1.6 m. We accept the width of the floor slabs bpl = 1.22m (5x1.22 = 6.1m = lp)
In the left and right lower corners of the building, we do not lay slabs, leaving holes for the arrangement of stair marches.
3.1. Structural solution of slab
The structural solution of the slab is made depending on the accepted dimensions
Constructive width of a plate is accepted on 1 cm (0.01 m) less nominal width, the accepted width, equal in size, "in = 1.22 m. The height of the plate is assumed to be 30 cm.
The plate shelf thickness is 5 cm.
The thickness of the side longitudinal ribs of the plate is 7 cm. The slope of the inner faces of the edges of the plate is 1:10. The thickness of the lower faces of the edges of the plate is assumed to be 9 cm.
3.7. Calculation of longitudinal rib for action of transverse force (selection of transverse reinforcement)
In the course design, we do not calculate the effect of the transverse force. Transverse reinforcement is accepted only according to design requirements.
Diameter of transverse reinforcement is assumed from the condition of welding with longitudinal working reinforcement.
For longitudinal working reinforcement we accept transverse reinforcement
2 6 A400.
Transverse reinforcement pitch:
 in the vicinity of supports (1/4 l0) the pitch will be:
cm, we take a pitch of 10 cm, rounding down a multiple of 5 cm;
 in the middle part of the plate the pitch will be equal to
, cm take a step of 20cm
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