Course design of reinforced concrete structures of the building with incomplete frame and cast-in-situ floors

Contents

Contents

Introduction

1. General information about a building with cast-in-situ floors

2. Static Cross Frame Calculation

3. Calculation of reinforced concrete monolithic girder by limit states of the first group

3.1 Calculation of crossbar for strength by sections normal to longitudinal axis

3.2. Calculation of reinforced concrete monolithic girder by sections inclined to longitudinal axis

4. Calculation of reinforced concrete monolithic girder by limit states of the second group

4.1. Calculation of reinforced concrete monolithic girder by crack formation and opening

4.2. Calculation of reinforced concrete monolithic girder by deformations (by deflections)

5. Calculation of precast reinforced concrete column and monolithic centrally loaded foundation

5.1. Calculation of precast reinforced concrete column for action of compressive longitudinal force with random eccentricity

5.2 Calculation of reinforced concrete monolithic centrally loaded foundation

6. Calculation of load capacity of a brick bed with mesh reinforcement

7. Calculation of prestressed round-point slab for the first and second groups of limit states

Conclusion

List of sources used

Introduction

In the course design, a building with an incomplete frame and prefabricated monolithic floors is considered, which is the object of study of this work.

The purpose of this course project is to design a building with an incomplete frame and prefabricated monolithic floors.

To complete the assigned target, you must enable tasks such as: Select a structural calculation scheme. collect loads on slabs, make layout of structural diagram of buildings and static calculation of transverse frame, calculate reinforced concrete monolithic girder according to the first and second group of limit states, calculate the precast reinforced concrete column for the action of compressive longitudinal force with random eccentricity and monolithic centrally loaded foundation, to calculate a brick spacer with mesh reinforcement and a pre-stressed round-empty slab according to the first and second group of limit states, to design the main elements of the building.

Conclusion

In summary, several conclusions can be drawn.

In this course project, the design of reinforced concrete structures of the building with an incomplete frame and prefabricated monolithic floors was carried out.

For the span between axes "A" and "B," "B" and "D," we accept 4 plates with a width of 1,200 mm and 1 plate with a width of 1,500 mm. For the span between axes "B" and "C" we accept 4 plates with a width of 1,500 mm.

The design load per 1 ppm of the crossbar from the overlap, taking into account the own weight of the crossbar, will be: constant: rpp = 32.97 kN/m; temporary: vpper = 8.3 kN/m; total: qpper = 41.27 kN/m.

Longitudinal force perceived by the first floor column from the full design load: N = 641.78 kN.

The moment of inertia of the crossbar relative to the center of gravity of the cross section is Ip = 1 622 142 196 mm4.

Design (maximum) bending moment of the crossbar in the span section in the extreme span: M1pr = M1pr = 171.55 kN * m, in the middle span: M2pr = M2pr (1 + 3) = 74.48 kN * m.

Limit transverse force perceived by concrete strip between inclined sections: Qult = 623.22 kN.

The bending moment of the crossbar in the span section in the extreme span from the action of the full normative load: M1pr, norm = 150.45 kN * m, including the bending moment of the crossbar in the span section in the extreme span from the action of the normative long-term load: M1pr, norm, l = 141.37 kN * m.

Cross-sectional area of monolithic crossbar in span section is equal to: Ar = 0.2504 m2 = 250 400 mm2.

Foundation height is H = 1600 mm.