IntroductionChapter 1

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1.1 Objective:

The main purpose of this project is to analyze and design a multi-storey building that

can take the worst combination of vertical loads that is subjected to that building.

This project has different sections to be studied. First the load calculation

including gravity loads acting on the whole structure. This analysis is done manually

by hand.

The slab structural system is one way ribbed slab which will be analyzed by using

PROKON software.

All the loads that are subjected to the building were calculated in details, Dead load,

Live load. These loads would be inserted to the analysis software and then combined

through a combinations specified from the ACI 318-08 code so it can make the most

sever effect on all the structural elements (envelope case) and the design of these

structural elements would be according to this envelope case.

Then all the beams were designed using the ACI 318-08 code design procedure.

The design results of the beams that are obtained from the manual calculations due to

the ACI code were compared so we can decide which of the two the most

conservative design is.

Samples of columns were considered to be designed, short rectangular column,

according to the ACI 318-95 design procedure.

Finally foundation is been design to carry the building huge loads to beneath soil.

single footing is been analysis and designed.

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1.2 Project Description:

The project is a residential multi-story building in Amman. That includes 4 stories,. Each floor has an area of 453m2 including the area of the roof of the staircase.

Stone cladding covers all the exterior walls, thermal insulation sheets 50mm thick are used, while 100mm hollow blocks are used for the interior walls.

The soil layers below the whole project site are a sequence of weak to medium hard, jointed limestone. The bearing capacity of such layers is about 200KN/m2

1.3 Project constituents:

The structural elements in this project are as follows:o Columnso Beamso Slabso Foundation

Columns:

Figure (2): cross section for column.

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A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below, For the purpose of wind or earthquake engineering, columns may be designed to resist lateral forces. But mainly compression and that is called pure column action there is another type of columns which carry both compression force and moment and that type is called beam column.

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Beams:

A beam is a horizontal structural element that is capable of withstanding load primarily by resisting bending. The bending force induced into the material of the beam as a result of the external loads, own weight, span and external reactions to these loads is called a bending moment.

Figure (3): cross section for Beam.

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Slabs:

A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 100 and 500 millimeters thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.

We will design ribbed slabs for the typical floors of our building and solid slabs for the basement floors.

Figure (4): cross section for slab.

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1.3 Material properties:

Compressive strength of concrete (f c' ) = 25 Mpa for all elements in the structure.

Yield strength of concrete and shear reinforcement (f y) = 420 MPa

The footings will be designed for 200 KN/m2 bearing capacity

1.4 Codes used:

Building Code Requirements for structural concrete (ACI 318 – 08) Jordanian Code for loads and forces (2006)

1.5 Engineering software’s used:

PROKON