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presentation on petronas twin tower

Apr 16, 2017

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Engineering

9122172

Petronas tower

Welcome to My Presentation on

Petronas twin tower Kuala Lumpur, Malaysia

Made by Omar Al Kaish Pasha UAP Bangladesh

Introduction:The Petronas Towers were designed to be the centerpiece of a larger complex called the Kuala Lumpur City Centre (KLCC).The project site is well located in the heart of the commercial district of the city, the Golden Triangle. According to the Council on Tall Buildings and Urban Habitat (CTBUH)'s official definition and ranking, they were thetallest buildings in the world from 1998 to 2004.It becomes a icon of Malaysia.

Historical background:In early 1981 the Malaysian Government decided to move the Selangor Turf Club and its horse-racing track from the heart of the city to the periphery and to redevelop the site to meet the demands of urban and economic growth.In the 1990s the project became a principal part of the Wawshan 2020 (2020 Vision),proposed by Dr. Mahathir Mohamad, the former prime minister of Malaysia, as part of his government plan for Malaysian progress at that time.Design:1991,Topping Out: 1998Official Opening: August 28, 1999

Architectural character:Architecture in Kuala Lumpur is heterogeneous, expressing the citys diverse history and cosmopolitan culture.Architect: Cesar Pelli

Architectural character:The early scheme for the tower design called for a twelve-pointed-star floor plan, but this was changed to an eight-pointed-star floor plan when the prime minister observed that the former geometry was more Arabic than Malaysian.The client decided to add a concert hall to the project on a third level between the two towers. The main entrance to the tower complex and the central lobby were totally redesigned.

Plan of the building:

up to 43th floor above 43th floor

Towers fact:Tower One: Petronas Headquarters offices.Tower Two: Mostly private tenants, KLCC Holdings offices, some vacant areas for rent.Height of each tower: 452 meters above street levelLength of Skybridge: 58.4 metersHeight of Skybridge : 170 meters. The Skybridge is on Level 41.Height of each pinnacle: 73.5 metersElevators: 29 double-decker high speed passenger lifts in each towerEscalators: 10 in each tower

Materials: More than 60 per cent of the materials used in the project were sourced locally.The Petronas Towers development marked the first use of high-strength concrete in Malaysia by local industry, at relatively economic cost.Local materials such as Malaysian wood, Terengganu granite, marble and glass were extensively used.The components of the stainless-steel cladding and vision-glass curtain walls were fabricated locally in Malaysia by a US firm.

Foundation:Engineers: Thornton-Tomasetti EngineersContractors: Mayjus and SKJ Joint VenturesThe Twin Towers were planned to be built on the site of the former Selangor Turf Club which was flat, green land. But soil studies showed that the site where the buildings were originally planned for, proved unsuitable for the foundation due to the irregularities of the limestone bedrock below that's known as Kenny Hill soil. For that reason they ranging from 60 to 114 meters (197 to 374ft) deep, were bored into the ground. The buildings were built on the world's deepest foundations. The Petronas Towers' structural system is atube in tube design , invented by bangladeshi EngineerFazlur Rahman Khan. Applying a tube-structure for extreme tall buildings is a common phenomenon .

Foundation:Each tower was calculated to weight 300,000 metric tones which would be spread over a large concrete slab called a mat. 104 concrete piles, ranging from 60 to 114 meters (197 to 374ft) deep, were bored into the ground. The concrete raft foundation . Exceeding the weight-bearing capacity of the soil and enough to cause the foundation to fail.Moreover, soil tests showed that the bedrock under both towers started shallow, 15m down, but sloped sharply to more than 180m.To support the immense weight, a depth of 21m would have to be excavated for the basement. This also meant penetrating the bedrock at one end but not the other.The building of the foundation, from the excavation to its completion, took 12 months to finish.Once the foundation for Tower One was ready in March 1994, Hazama Corporation was mobilized. The construction of Tower Two by Samsung began a month later in April once the foundation was prepared

Foundation:

Superstructure:

Each tower is supported by a ring of sixteen cylindrical columns of high-strength reinforced concrete, placed on the inner corners of the star-shaped plan.The columns are nearly 2.4 meters in diameter at the base of the building, but taper as they rise through the floors.At the center of each tower is an approximately 23-by-23-metre concrete core.The cores create two virtually solid walls running north-south and east-west.Structural steel was used for typical long span floor beams.There is a sky bridge at level 41 because it had to accommodate differing movements from each tower.The 'two-hinged arch' springs from supports at level twenty-nine and rises at 63 to support a pair of parallel two-span continuous bridge girders at level forty-one.

Maintenance:KLCC Holdings has established a specialized facility management firm, the KLCC Urusharta.The scope of maintenance and facility management tasks is categorized into several parts: building control system, vertical transportation, power distribution and energy management, telecommunications, fire alarm system,

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