Reimaginingkau - KAU - Othman Alghamdi - Faculty of environmental designs

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FACULTY OF ENVIROMENTAL DESIGN

KING ABDULAZIZ UNIVERSITY FACULTY OF ENVIROMENTAL DESIGN DEPARTMENT OF ARCHITECTURE OTHMAN SAEED ALGHAMDI 1210054


1.0 INTRODUCTION

2.0 CASE STUDY

3.0 ANALYSIS

4.0 PROGRAM

5.0 CONCEPT

6.0 BUILDING DESIGN

1.1 Background 1.2 Project brief 1.3 Location 1.4 Problem statement 1.5 Vision

4.1 Current functions 4.2 Functions

CONTENT

2.1 Jaunas museum 2.2 Alphabeta office building

5.1 Concept strategies 5.2 Alternatives 5.3 Alternatives test 5.4 Mass development 5.5 Concept 5.6 Concept design

3.1 Physical 3.2 Building components 3.3 Structure

6.1 Plans 6.2 Desgin overview 6.3 Bioclimatic 6.4 Energy 6.5 Working drawings 6.6 Sections 6.7 Elevations 6.8 Systems 6.9 Site context 6.10 Perspectives


1.0 INTRODUCTION

INTRODUCTION

1.1 Background 1.2 Project brief 1.3 Location 1.4 Problem statement 1.5 Vision


1.0 INTRODUCTION | 1.1 BACKGROUND

KING ABDULAZIZ UNIVERSITY King Abdulaziz university is considered one of the most important landmarks in Jeddah. It is one of the most popular places in Jeddah on a daily from all sectors of the society, because it contains many activities and educational and recreational services. The project comes as a continuation of campus development in terms RI XUEDQ DQG HQYLURQPHQWDO 7KH SURMHFW DLPV WR LPSURYH RQH RI WKH EXLOGLQJV RI WKH DFDGHPLF VTXDUH LQ WHUPV RI DUFKLWHFWXUDO DQG HQYLURQPHQWDO VLJQL¿FDQWO\

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1.0 INTRODUCTION | 1.2 PROJECT BRIIEF FACULTY OF ENVIROMENTAL DESIGN It concerned with teaching of physical planning and design sciences. It contains four sections: Planning, Landscape architecture, Architecture, and Geomatics. It includes studios, RI¿FHV KDOOV DQG FODVVURRPV in addition to laboratories equipped with new equipments. Founded in 1976, then college moved to new building of academic square in 2013. New faculty of environment designs EXLOGLQJ ZDV ¿UVW FROOHJH EXLOGLQJ establish in the academic square. It is located in southern part of academic VTXDUH DQG FRQWDLQV ¿YH ÀRRUV WZR front and rear courtyards, and a lobby in the middle of the building.

5 Floors

2 Main Entrances

High= 25.5m

3 Free Facade

05


1.0 INTRODUCTION | 1.3 LOCATION FACULTY OF ENVIROMENTAL DESIGN - College is located in the southern part of the academic square.

illage Sport v 16 min

- College is connected directly to the most lively street (Colleges street). - Adjacent to the college: East: Deanship of Community Service. West: Faculty of Administration and Economics. North: classroom building 31,26. South: Colleges street. - The importance of college site is that it is considered the gateway to academic square in the southern part of it, and a contact point with the old campus.

Hospital 17 min

10 min

3.5 min

5 min

King Fais al hall

7.5 min

Mosque 3.5 min

9 min

- College building has three free facades that are not connected to any adjacent building.

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1.0 INTRODUCTION | 1.4 PROBLEM STATEMENT PROBLEM STATEMENT In spite of the simplicity of the exterior shape of the building, but it still has many problems. The most prominent of these issues are: 1. Structure: Enormity of the building structure contributed to see the building huge and visually uncomfortable. In addition it caused its obstruction in use of spaces appropriately. 2. Waste energy: 1RW EHQH多WLQJ RI QDWXUDO YHQWLODWLRQ and replace it with excessive use of air conditioning. 3. Unused spaces: Some of the spaces that were designed were not properly designed DQG WKHUHIRUH GLG QRW EHQH多W IURP them. 4. Building materials: The materials used have health-damaging aspects in addition to their enormous use make the building looks dull.

Sport village

Sport village

Hospital

General parking

Old campus

Hospital

General parking

Old campus

CENTER OF UNIVERSITY

ATTENTION POINT

BECAME A LANDMARK

Based on what has been done of development of campus, academic square is the most prominent place of the university, because of existence colleges and services in addition to its location in the center of the university.

The site of Faculty of Environment Designs is a big challenge because it LV ORFDWHG RQ D KLJK WUDI多F GHQVLW\ street ( Colleges street), in addition to it is opposite to the old campus area, which makes it a gateway through which to the academic square.

Historically, Faculty of Environment 'HVLJQV LV WKH 多UVW FROOHJH EXLOGLQJ was established in the academic square, and has since become a landmark to arrive to the academic square.

07


1.0 INTRODUCTION | 1.5 VISION VISION AND GOALS According to what has been done of studies to develop the university, it was focus on the development of two DVSHFWV ¿UVWO\ RQ SODQQLQJ DQG WKH other on sustainability. To achieve sustainability, we must work on three principles : 1. Social. 2. Economic. 3. Environmental. Accordingly, the work will be carried out according to architectural and design principles that contribute to the development of the building and UDLVH LWV HI¿FLHQF\ DQG TXDOLW\ IURP what it is now, relying on analysis, studies and tests of the current situation. Vision: Make the building a good development example compatible with the local environment.

SOCIAL

ECONOMIC

ENVIRONMENTAL

Goals: - Create social environment motivate to work and study. - Improve entertainment aspects and sharing

Goals: - Target students coming through the JDWH WR WKH DFDGHPLF VTXDUH - Reduce dependence on electricity.

Golas: - %HQH¿W IURP QDWXUDO OLJKWLQJ DQG ventilation. - Use sustainable building materials.

Criteria: - Redesign the spaces correctly. - Linking with outside spaces. - Provide recreational spaces for leisure.

Criteria: - Provide an exhibition for student work. - Provide commercial activities. - Utilization of natural resources.

Criteria: - Increase the linkage of the internal space with the external space. - Changing materials used in facades DQG ÀRRUV WR VXVWDLQDEOH ORFDO materials.

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2.0 CASE STUDY

2.1 Jaunas museum 2.2 Alphabeta office building

CASE STUDY


3.0 CASE STUDY | 3.1 JAUNAS MUSEUM JAUNS MUSEUM The project is located in the historic town of Rapperswil in the city of Rapperswil-Jona, Switzerland At the end of the 13th century a small IRUWL¿HG FRPSOH[ ZDV EXLOW LQVLGH WKH WRZQ ZDOOV FRQVLVWLQJ RI D IRUWL¿HG WRZHU DQG DQ UHVLGHQWLDO EXLOGLQJ 7KH LQWHULRU VSDFHV RI WKH FRPSOH[ were preserved until 1943 when the EXLOGLQJ ZDV XVHG DV D PXVHXP In 2007, a competition was announced for the develop the museum and Janus project was the ZLQQHU WKH LGHD RI SURMHFW LV WR EXLOG D QHZ EXLOGLQJ WKDW LV VHQVLWLYHO\ integrated with overall impression of the historic town. The northern façade of the project KDV EHHQ SUHVHUYHG LQ D homogeneous manner with adjacent EXLOGLQJV EHFDXVH LW UHÀHFWV WKH visual impression of the historic town. The southern façade overlooking the street was designed in a modern way, giving a different impression of the surrounding to show that it is the entrance to a modern museum.

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3.0 CASE STUDY | 3.2 ALPHABETA OFFICE BUILDING ALPHABETA BUILDING The project is located in London, UK. ,V D PXOWL IXQFWLRQDO RI¿FH EXLOGLQJ located adjacent to a modern district DQG ¿QDQFLDO GLVWULFW RI /RQGRQ 7KH EXLOGLQJ ZDV WKUHH EXLOGLQJV HVWDEOLVKHG LQ ZKLFK LW OLQNV WR EH RQH VLQJOH EXLOGLQJ ZLWK D modern and shared social spaces. 7KH LQWHULRU VSDFH GHVLJQHG WR EH LQWHUFRQQHFWHG E\ XVLQJ WUDQVSDUHQW IDFDGHV DQG FHLOLQJ WKDW DOORZV WR HQWHU QDWXUDO OLJKW WKURXJK LW DQG DOVR for visual communication. The project aims to attract media FRPSDQLHV WHFKQRORJ\ DQG SHRSOH E\ SURYLGLQJ PXOWL XVH VSDFHV RQ WKH JURXQG ÀRRU WR HDUQ UHYHQXH

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3.0 ANALYSIS

3.1 Physical 3.2 Building components 3.3 Structure

ANALYSIS


3.0 ANALYSIS | 3.1 PHYSICAL

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Connect the two buildings and create sharing space that collect works of students because of the strong relationship between the two buildings.

Connecting the front and back spaces to form a single space that contributes for ventilation in addition to making it a space for student activities.

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NEIGHBORHOOD

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3.0 ANALYSIS | 3.1 PHYSICAL SITE CONDITIONS

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Link the street with the academic square by establishing a pedestrian bridge to assist access to the DFDGHPLF ¿HOG ,QVWHDG RI XVLQJ WKH lower college entrance.

Add another main entrance to the college from the side for easy access across the bridge.

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ACCESSIBILITY

14


3.0 ANALYSIS | 3.1 PHYSICAL SITE CONDITIONS

DESIGN RESPONSE

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It is clear from the large building area that there are large wasted spaces that are not properly exploited. In addition to the closed lobby which causes high consumption of air conditioning. So we will connect the external spaces with the internal space.

Dealing with three solutions either extending the atrium, or decrease the depth of the south facade, or create open spaces that contribute to the introduction of natural lighting.

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DIMENSIONS AND AREA

15


3.0 ANALYSIS | 3.1 PHYSICAL SITE CONDITIONS

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Link the northern facade on the JURXQG ÀRRU OHYHO ZLWK WKH H[WHUQDO space and create commercial activties that contributes to activating the space. Link the northern space with the internal arena of the college directly.

%HQH¿W RI WKH HDVWHUQ VLGH E\ establishing a building supporting the building of Faculty of Environmental Designs.

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VIEWS (FROM SITE)

16


3.0 ANALYSIS | 3.1 PHYSICAL SITE CONDITIONS

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Connecting the front and back spaces to form a single space that contributes for ventilation in addition to making it a space for student activities.

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VIEWS (TO SITE)

17


3.0 ANALYSIS | 3.2 BUILDING COMPONENTS BUILDING COMPONENTS

x 10

x273

y284

x10

x273 y2 66

y225.5

y1 0 y1 0

x236

y1 0

Facade void ratio Area : 1,861 m2 Void : 456.3 m2 Solid: 1,404.7 m2

x10

24.5% 75.5%

Built-up area Area : 5,710 m2 Void : 406 m2 8% 2 Solid: 5,304 m 92%

Corridor ratio Area : 1,055.6 m2 Ratio : 20%

Student area in studio Area : 321 m2 Students : 40 Student area : 8 m2 Standard : 3.5-4.5 m2

Space depth Area : 321 m2 Studio depth from window : 16.5 m Standard : 4.5-6 m *D = 1.5 x Hw

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3.0 ANALYSIS | 3.3 STRUCTURE STRUCTURAL SYSTEM

Height of space : 5 m Clear height : 3.6 Depth of ceiling : 1.15 m 7KLFNQHVV RI ÀRRU P Depth of beam : 0.55 Diameter of column : 0.9 m

Zone B :

Type A :16.8 x 9.6 4

Type B :16.8 x 7.2 2

Type A :16.8 x 9.6 10

3

zone C

zone D

Type B :16.8 x 4.8 4

Zone D : Type C :16.8 x 6

zone C

zone B

Lifts walls are reinforced concrete. 7KH ÀRRU RI FRUULGRUV KDYH VHSDUDWH structure from the structure of the interior spaces.

Zone A :

zone B

the structure system of the building is two way slab, it made of reinforced concrete cast in site.

Type A : 9.6 x 9.6 6

Zone C : Type A :16.8 x 9.2 2

Type B : 9.6 x 4.8 4

zone A

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4.0 PROGRAM 4.1 Current functions 4.2 Functions

PROGRAM


4.0 PROGRAM | 4.1 CURRENT FUCNTIONS

Employee offices : 19 office Academic offices : 128 office Lifts : 6 Staircase : 5 Labs : 12 Studios: 27 type A type B AR 10 : 2 8 LA 6: 3 3 URP 7 : 3 4 GEOM 4 : 1 3 type A : 194 m2 type B : 300 m2

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AR

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Keywords

LA

GEOM

AR

AR

AR

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GEOM

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URP

URP

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STUDIO SERVICES CLASS LAB AND HALL

URP

AR

URP

AR

ACADEMIC EMPLOYEE CORE LA

LA

GEOM

GEOM

URP LA

URP

URP

AR

21




5.0 CONCEPT

CONCEPT

5.1 Concept strategies 5.2 Alternatives 5.3 Alternatives test 5.4 Mass development 5.5 Concept 5.6 Concept design


5.0 CONCEPT | 5.1 CONCEPT STRATEGIES DESIGN APPROACH

In addition to creating public spaces and activities for students and improvLQJ WKH TXDOLW\ RI ZRUN DQG VWXG\ E\ SURYLGLQJ VKDUHG ZRUN VSDFHV DQG visual communication.

Landscape Urban planning Public

To Academic square

Geomatics

6SOLW WKH PDMRUV YHUWLFDOO\ WR RSWLPL]H WKH OLQNDJH LQ horizontal.

2I¿FHV

Labs & classrooms

6RPH ÀRRUV VODEV ZLOO EH UHPRYHG while maintaining the structure EHFDXVH RI GLI¿FXOW\ RI GHDOLQJ ZLWK the existing structure and this will help to reduce the losses.

Architecture Studio

The building will be treated with the SUHVHUYDWLRQ RI VRPH ÀRRUV DQG ZDOOV and the removal of some of them to achieve maximum ventilation and natural light.

/LQNLQJ VKDUHG XVHV WR HDFK other and separate them from other uses.

Minimize wasted space on the corridors to allow the largest amount of natural light to enter the building.

Achieve three elements: 1. Natural ventilation 2. Natural lighting 3. Interconnection of spaces

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Atrium

View

Entrance

A

B

C

D

F

G

H

Cost Safty Functionally Position

5.0 CONCEPT | 5.2 ALTERNATIVE

A B C D E F G A B C D E

A B C D E F G

Corridor

A B C

High Medium Low

3 2 1

25


5.0 CONCEPT | 5.2 ALTERNATIVE

Library

Commercial

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Lab

100 - 200 - 300 - 400 VWXGLR

Academic + employee RI¿FHV

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5.0 CONCEPT | 5.3 ALTERNATIVE TEST ALTERNATIVE 1 Wind analysis: - Wind speed - Direction - Hight

2.5 m/s North west +5 , +20

Shadow analysis:

15 12 10 8 6 4 2 0

- Test in summer solstice 21 Jun ( 8 am - 4 pm ). - Test in winter solstice 21 Dec ( 8 am - 4 pm ).

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8 am - 21 Jun

4 pm - 21 Jun

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8 am - 21 Dec

4 pm - 21 Dec

27


5.0 CONCEPT | 5.2 ALTERNATIVE

Library

Academic + employee RI¿FHV

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Lab &ODVVURRP

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100 - 200 - 300 - 400 VWXGLR

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5.0 CONCEPT | 5.3 ALTERNATIVE TEST ALTERNATIVE 2 Wind analysis: - Wind speed - Direction - Hight

2.5 m/s North west +5 , +20

Shadow analysis:

15 12 10 8 6 4 2 0

- Test in summer solstice 21 Jun ( 8 am - 4 pm ). - Test in winter solstice 21 Dec ( 8 am - 4 pm ).

)RXUWK ÀRRU P

8 am - 21 Jun

4 pm - 21 Jun

)LUVW ÀRRU P

8 am - 21 Dec

4 pm - 21 Dec

29


5.0 CONCEPT | 5.2 ALTERNATIVE

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Library

Commercial

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Lab

100 - 200 - 300 - 400 VWXGLR

Academic + employee RI¿FHV

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ALTERNATIVE 3

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5.0 CONCEPT | 5.3 ALTERNATIVE TEST ALTERNATIVE 3 Wind analysis: - Wind speed - Direction - Hight

2.5 m/s North west +5 , +20

Shadow analysis:

15 12 10 8 6 4 2 0

- Test in summer solstice 21 Jun ( 8 am - 4 pm ). - Test in winter solstice 21 Dec ( 8 am - 4 pm ).

)RXUWK ÀRRU P

8 am - 21 Jun

4 pm - 21 Jun

)LUVW ÀRRU P

8 am - 21 Dec

4 pm - 21 Dec

31


5.0 CONCEPT | 5.2 ALTERNATIVE

Cost Safty Functionally Position Total

ALTERNATIVE 1

ALTERNATIVE 2

ALTERNATIVE 3

1 2 3 3

2 1 3 3

2 2 2 2

2 3 2 3

3 2 2 3

3 2 2 3

9/12 9/12 9/12 12/12

39 / 48

2 3 3 2

3 2 2 2

3 2 2 2

10/12 8/12 10/12 9/12 37 / 48

2 3 2 2

2 3 2 2

2 2 2 3

8/12 10/12 8/12 9/12 35 / 48

32


5.0 CONCEPT | 5.4 MASS DEVELOPMENT

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1. Increase linkage with external spaces, and connect the internal space with the southern region by providing commercial activities.

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5. Covering the building with a roof that allows air and light to reduce direct sunlight.

33


5.0 CONCEPT | 5.5 CONCEPT

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5.0 CONCEPT | 5.5 CONCEPT

ART

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5.0 CONCEPT | 5.5 CONCEPT

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5.0 CONCEPT | 5.5 CONCEPT Traditional gallery

8.4 m

8.4

m

1.2 m

2.7 m

Scenario 1

Scenario 2

Scenario 3

My own concept 8.4 m

Gallery + Presentation zone

8.4 m

Public

Semi private

Private

37


5.0 CONCEPT | 5.6 CONCEPT DESIGN

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38


6.0 BUILDING DESIGN

BUILDING DESIGN

6.1 Plans 6.2 Desgin overview 6.3 Bioclimatic 6.4 Energy 6.5 Working drawings 6.6 Sections 6.7 Elevations 6.8 Systems 6.9 Site context 6.10 Perspectives








6.0 BUILDING DESIGN | 6.3 BIOCLIMATIC BIOCLIMATICE SECTION

Photovoltaics

Openable windows

)LUVW ÀRRU

Truss system roof

Rotated 21o

Flat roof

46


6.0 BUILDING DESIGN | 6.3 BIOCLIMATIC WIND TEST Wind analysis: - Wind speed - Direction - Section

2.5 m/s North west North-south

In current situation : wind not cross the building

15 12 10 8 6 4 2 0

1. Flat roof

But now with opened atrium it can enter the building supported by roteted roof that orinate the wind to down. $QG ZLWK RSHQHG ¿UVW ÀRRU LW JLYHV more chance to let the wind enter the building. 2. Rotated 21o

3. Wing roof

47


6.0 BUILDING DESIGN | 6.4 ENERGY ELECTRICITY PRODUCTION:

ELECTRICITY DEMAND:

VWDQGDUG FODVVURRP OX[ OPDS TXDQWLW\ DUHD [ OX[ [ OXPHQ RI ODPS [ [ 84 lamp GHPDQG RI OLJKWLQJ ODPSV [ ZDWW [ ZK [ .:K P2 .:K P2 = 36.5 KWh/m2 annual

BUILDING INFORMATION:

LG Neon r solar panel (I¿FLHQF\

devices : 40 power : 180 wh GHPDQG RI GHYLFHV [ ZK [ .:K P2 .:K P2 = 195.53 KWh/m2 annual

RESULTS:

URRI XVDEOH DUHD P2 SY DUHD P2 SY SDQHOV SDQHO HI¿FLHQF\ RI SY slope = 0o SY SURGXFWLRQ LQ \HDU .:K DQQXDO [ [ .:K DQQXDO total annual pv supply = 2,088,600 KWh annual

Total demand vs PV production 16,000,000

7RWDO GHPDQG .:K P2

14,000,000

%XLOGLQJ GHPDQG [ 10,902,794 KWh annual

12,000,000 10,000,000

Electricity production = 2,088,600 KWh annual

8,000,000

Electricity demand = 10,902,794 KWh annual

6,000,000

KWh annual

co2 control = 156.26 KWh/m2 annual

HP Pavilion Desktop Power :180 wh Quantity : 40

Philips tube LED lamp Power :16 wh /XPLQRXV ÀX[ OXPHQ

Air handling unit co2 control

4,000,000

(OHFWULFLW\ SURGXFWLRQ RI GHPDQG

2,000,000 0

:LQJ URRI

PV production 2,088,600 KWh annual Building demand 10,902,794 KWh annual

5RRI XVDEOH DUHD P2 %XLOGLQJ IORRUV DUHD P2

48







6.0 BUILDING DESIGN | 6.8 SYSTEM STRUCTURE 1

Bearing wall

2

3

4

5

6

7

8

9

10

11

12

13

M

M

L

L

9.30

9.60 K

K

J

J

I

I

H

H

G

G

F

F

E

E

9.60

9.60 4.80 9.60 4.80 9.60

9.60 D

D

C

C

B

B

A

A

7.20 7.20

Existing reinforced columns Steel structure

4.88

1

New structure

2

7.20

3

7.20

4

9.60

5

9.60

6

7

8

6.60 6.00 6.60

9

9.60

10

9.60

11

7.20

12

7.20

13

9.00

NHHS WKH VWUXFWXUDO V\VWHP RI WKH EXLOGLQJ EHFDXVH LW LV GLI¿FXOW WR UHPRYH LW LQ addition to add some structural elements that support the new additions of the building. $V IRU WKH H[KLELWLRQ WKH HVWDEOLVKPHQW RI LURQ EHDPV OLQNLQJ WKH VWUXFWXUH RI HQYLURPHQWDO GHVLJQ FROOHJH ZLWK WKH DGMDFHQW EXLOGLQJ Beam connection

Column connection

54


6.0 BUILDING DESIGN | 6.8 SYSTEM HVAC

Co Mechanical shaft Mechanical room

oli

ng

tow

er

1

2

3

4

5

6

7

8

9

10

11

12

13

M

M

L

L

9.30

9.60 K

K

J

J

I

I

H

H

G

G

F

F

E

E

9.60

9.60 4.80 9.60 4.80 9.60

9.60 D

D

C

C

B

B

A

A

7.20

Supply duct Return duct

7.20 4.88

1

2

7.20

3

7.20

4

9.60

5

9.60

The air is cooled out of AHU through cold water that it comes from the central air FRQGLWLRQLQJ VWDWLRQ RI WKH XQLYHUVLW\ 7KH ZDWHU LV SXPSHG WR WKH WRS RI WKH EXLOG LQJ E\ SXPSV WKDW GHOLYHU WKH ZDWHU WR $+8 Then air cools and pump into the space then the air returns to AHU to be cooled again and pumped back into space again in endless circulation process.

6

7

8

6.60 6.00 6.60

9

9.60

10

9.60

11

7.20

12

7.20

13

9.00

AHU

Supply

Return Pump

Cooling system

Cold water

55


6.0 BUILDING DESIGN | 6.8 SYSTEM FACADE 1.50 m P 0.60 m

Ceiling Transparent facade

(OHYDWHG ÀRRU ([LVWLQJ ÀRRU

Solid wall

EFTE textile facade

GRC

Glass panel

Material GRC was reused in the external and internal facades of the building by UHSODFLQJ WKH JUDQLWH PDWHULDO ZKDW LW KDV QHJDWLYH LPSDFW ,Q DGGLWLRQ WR XVH RI PDWHULDO (7)( LQ WKH IDFDGH WR SURWHFW LW IURP GLUHFW VXQOLJKW ZKLFK LV FKDUDFWHUL]HG E\ QRQ EORFNLQJ YLVLELOW\ (7)( 7 8 : PU. * *ODVV 7 8 : PU. * 5HI ZZZ ELUGDLU FRP WHQVLOH DUFKLWHFWXUH EHQH¿WV HQHUJ\ OLJKWLQJ

Recycled GRC

Glass panels

ETFE textile facade

56


6.0 BUILDING DESIGN | 6.8 SYSTEM :,1* 522)

:LQJ URRI

P

Solid wall

0RYDEOH ZDOOV

10 m

144o 15o

21o

Mechanical room

0RYDEOH ZDOOV

0RYDEOH ZDOOV

for weather changing like sand hurricanes or rain

$WULXP DUHD LV FRYHUHG ZLWK D URRI WKDW LV GHVLJQHG WR GLUHFW WKH ZLQG GRZQ WKH DWULXP IRU QDWXUDO YHQWLODWLRQ ,Q DGGLWLRQ LW FRYHUHG ZLWK 39& PDWHULDO WR FRQWULEXWH WR UHGXFH WKH DPRXQW RI direct natural light.

PVC floor material for diffused light

Light steel structure

Use it for PV panels

57







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