Design calculation of a single-storey industrial building

Contents

1. Introduction

2. Design Task

2.1. Source Data

2.2. Sizing a Cross Frame

3. Determining Cross Frame Loads

3.1. Load from the dead weight of the coating structure

3.2. Snow load

3.3. Wind load

3.4 Crane load

4. Static Frame Calculation

5. Middle Column Calculation and Design

5.1. Source Data

5.2. Above-crane part reinforcement calculation:

5.3. Calculation of reinforcement in the crane part of the column

5.4. Column Console Reinforcement Calculation

5.5. Calculation of anchor length of longitudinal rods of frames in column console

6. Calculation of reinforced concrete segment truss

6.1. Design Task

6.2. Lower Belt Calculation

6.2.3. Calculation of limit states of the second group

6.2.4. Calculation of the lower belt for crack formation

6.3. Top Belt Calculation

6.4. We calculate the stretched elements of the lattice

6.4.1. Calculation of limit states of the first group for strength

6.4.2. Calculation of limit states of the second group

6.5. We calculate the compressed elements of the lattice

7. Calculation and Design of Truss Nodes

7.1. Calculation of transverse reinforcement in the support unit

7.2. Calculation of transverse reinforcement in intermediate unit

8. List of literature used:

Introduction.

In the course design under development, the reinforced concrete frame of a one-story production building is calculated in accordance with the basic principles of calculation, design and layout of reinforced concrete structures and the frame of a light-aeration canopy made of rolled metal.

Loads are collected in accordance with SP 13.13330.2011 "Loads and Impacts," and structures are calculated in accordance with SP "Concrete and Reinforced Concrete Structures. Design Standards. "

Limit refers to the state of the structure, after which its further normal operation becomes impossible due to the loss of the ability to resist external loads and impacts or to unacceptable movements and local damage. Reinforced concrete structures shall meet the requirements for load capacity calculation - limit states of the first group and for suitability for normal operation - limit states of the second group.

The calculation of the limit states of the first group shall ensure the necessary strength and stability of the structure in order to prevent:

• fragile, viscous or other destruction;

• loss of stability of the structure shape (calculation for stability of thin-walled structures, etc.) or its position (calculation of the structure for overturning, sliding, surfacing, etc.);

• fatigue failure (calculation of endurance of structures under the influence of repeatedly repeated load - movable or pulsating: crane beams, sleepers, frame foundations and floors for unbalanced machines, etc.);

• destruction from the joint action of force factors and adverse influences of the external environment (aggressive environment, alternate freezing and thawing, etc.).

Calculation of limit states of the second group is performed to prevent:

• formation of cracks in structures and their excessive or continuous opening (if under operating conditions the formation or prolonged opening of cracks is unacceptable);

• excessive movement (deflections, angles of rotation and skew, oscillations).

Calculation according to the limit states of the structures as a whole, as well as its individual elements, is carried out for all stages: manufacture, transportation, erection and operation, and the design diagrams must correspond to the accepted design solutions.

When calculating by limit states, the following factual factors are taken into account:

• loads and impacts, their probable deviations (mainly exceeding) from average values, unfavorable combination of permanent and temporary loads (long-term, short-term and special);

• mechanical characteristics of concrete and reinforcement (temporary resistance, yield strength), variability of these characteristics, working conditions of materials;

• general operating conditions of structures, conditions of its manufacture, aggressiveness of the medium, etc.

In settlement formulas of a deviation of loadings are considered by reliability coefficient on loading γf, variability of mechanical characteristics of materials - reliability coefficients on concrete γb and fittings γs, working conditions - coefficients γbi, γsi, degree of responsibility of buildings and constructions - reliability coefficients appointed by designs γn = 0.8 ÷1. The calculated loads or forces are multiplied by the coefficient αn, or the calculated resistances of the materials or the non-essential capacity of the element are divided.

Thus, the calculation of limit states ensures that during the design period of operation of the structure, none of the unacceptable limit states for the structure as a whole and for individual parts of it will occur.

Defines the load on the transverse frame.

On the transverse frame of the workshop there are constant loads from the weight of the enclosing and load-bearing structures of the building, temporary from bridge cranes and atmospheric effects of snow and wind.

Several loads can be applied to the building at the same time and several combinations of them are possible, taking into account the absence of some of them or possible changes in the diagrams of their application. Therefore, the frame is calculated for each of the loads separately, and then a calculated combination of forces is made at a disadvantageous combination of loads. At the same time, the load values ​ ​ should be calculated separately, even if they have the same distribution patterns on the structure, but differ in the duration of the impact.

ЖБК Стр_1_1_0913_1_1_0203.dwg