Joan Tresserras Pujol-Xicoy TALL BUILDING DRAFT DESIGN

1. Section dimensions

2. Design requirements

Wind loading: According to the chinese code: Return period of 50 years Wp = 0,55KN/m 2. Return period of 100 years Wp = 0,60KN/m 2 Building situated in Tianjin, China Roughness type C When using the program we choose the Chinese 2002 code 3. Loading

Earthquake loading: Design with a basic fortification intensity of 7. In consequence a ground acceleration of 0,15g is used. Site classification is a site-class IV. When using the program we choose the Chinese 2002 code. 3. Loading

Live load: Following the chinese code: 3. Loading

Basically, the material used will be concrete. Default concrete given by ETABS is a C40 concrete. For structural reasons a new concrete C60 will be created. Steel only used in the reinforcement bars. 4. Materials

A 3-D grid with all the elevation and plan dimensions inputed has to be created. 5. Model elaboration

It is convenient to create a new set of columns every 5 stories to make it easy when dimensioning them. In the first 4 floors the columns that dont have floors on top will also be different than the ones with 35 floors on top 5. Model elaboration

When drawing shear walls its possible to distinguish into two kinds of shear walls: The ones surrounding the elevators and stairs. In the residential floors, the ones dividing the different apartments. 5. Model elaboration

There are two kinds of beams: Primary beams that go from column to column. The moment release for this kind of beams will be continuous. Secundary beams that go from beam to beam. The chosen distribution for this type of beams is a cross distribution. The moment release for this kind of beams will be pinned. No beams should be drawn inside the shear walls. 5. Model elaboration

Two kinds of slabs: 1.Normal slabs ; 2.Inside shear walls slabs 5. Model elaboration

Three requirements should be met by the model: First rotation period / x or y period < 0,9 Story drift < 1/800 Maximum story drift / average story drift < 1,4 To meet this three requirements a process of analysis and later dimensioning of the structural members will take place. It will be necessary to look at the different modes of structure to determine which one is the first to have rotation. 6. Model analysis

1st mode2nd mode 3rd mode

6. Model analysis Deformed shape3-D View Longitudinal Reinforcing

6. Model analysis

First rotation period / x or y period < 0,9 The first rotation period is the one of the third mode = 1,85398 The first period with x or y movement is the first mode = 2, ,85398 / 2,50081 = 0, < 0,9 Story drift < 1/800 The maximum story drift is for the 35 th floor: 1/811 < 1/800 Maximum story drift / average story drift < 1,4 The maximum story drift is for the 1 st floor= 1/811 Average story drift = 9,5992*10^(-4) (1/811) / ( 9,5992*10^(-4)) = 1,285 < 1,4 7. Requirements

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