Reinforced concrete and stone structures - design of ribbed slab

Contents

Option 1-

1 Initial data

2 Calculation and construction of the floor panel

2.1 Design Assignment

2.2 Calculation of the shelf

2.3 Calculation of transverse rib

2.4 Calculation of longitudinal edges

2.4.1 Static calculation

2.4.2 Preliminary determination of section area of longitudinal stretched and transverse reinforcement in longitudinal ribs

2.4.3 Determination of geometric characteristics of longitudinal edges

2.4.4 Preliminary voltage and its losses

2.4.5 Check of cross section strength of longitudinal edges normal to their longitudinal axis

2.4.6 Calculation of strength of sections inclined to longitudinal axis of panel for action of transverse force

2.4.7 Calculation of cracks normal to the longitudinal axis of the panel in the stage of manufacture, transportation and installation

2.4.8 Calculation of crack formation normal to the longitudinal axis of the panel during operation

2.5 Calculation of deformations

2.6 Panel Design

2.6.1 Calculation results

2.6.2 Panel Design

3 List of literature

Option 1-5

Source Data

Construction of precast reinforced concrete slab of multi-storey building slab.

Develop the design of a prefabricated slab of heavy prestressed reinforced concrete. Calculations for the first and second groups of limit states should be made for the stages of manufacture, transportation and installation, operation.

The floor, designed from prefabricated ribbed or multistage plates, provides for their installation on prefabricated girders.

Nominal dimensions, m 6.6 × 1.5.

Load (normative):

constant: = 0.6 kPa;

short-term = 2.2 kPa;

long-term part of time = 0.8 kPa.

Place of construction: Tyumen.

The strained class fittings: A600.

Other data:

not strained working fittings of classes: A400, Vr500;

constructive fittings of a class: A300.

Concrete heavy class B25.

For odd digits of the first line of the cipher, a ribbed circuit of the plate is used, for even digits - multi-empty.

We take into account the ribbed scheme of the plate.

Calculation of the slab in the manufacturing stage

When calculating the slab at the manufacturing stage, it is necessary to check the crack resistance of the upper zone of the slab, as well as the strength of the concrete of the compressed zone from the prestress force, considering the most dangerous combination of loads and, taking into account the reduced strength properties of the concrete.

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