Complex building in Guangzhou (CTF Center Building)

Complex building in Guangzhou (CTF Center Building)

Building use

Complex building

Country/Region

All Regions

Overview

Main structural members like shear walls, columns, and floors adopted composite components to increase their bearing capacity.

Basic information (construction date, number of stories, gross floor area, adopted design code, engineer(s), Contractor(s), etc.)

Construction date: 2016
Number of stories: 112
Gross floor area: 507,000m2
Adopted design code: GB 50223-2008; GB 50009-2001; GB 50011-2006; GB 50010-2002; JGJ 3-2002; GB 50017-2003; JGJ 138-2001; GB 50204-2002; GB 50205-2002; GB 50045-95 (2005 edition); DBJ/T 15-92-2005
Engineer(s): Arup, Guangzhou design institution group Co. Ltd
Contractor(s): China Construction Fourth Engineering Bureau Co., Ltd

Issue and/or innovation

1. The innovative design of the structural system. The building height of this project is 530 meters high. Set up giant diagonal braces to make the office, apartment, and hotel functions of the building the most user-friendly, and to ensure the value of the building space. This structural system is the first application in the 500-meter super high-rise project in China, and it is the only one so far Cases require a lot of technical demonstration work before they are approved by experts.
2. The combined shear wall with double-layer steel plates and C80 high-strength concrete, due to the huge building volume and heavy weight of this project, if the shear wall of the core tube is designed according to the traditional method, it will need a large thickness. Therefore, we studied the design of double-layer steel plate and C80 high-strength concrete, which was adopted for the first time in China at that time, and it is still the only one-dimensional solution.
3. Multi-cavity giant concrete-filled steel tube columns. The giant column of the tower reached 3.5×5.6 meters in the low area, which was the largest steel-filled steel tube concrete column at that time. The form of conventional steel pipe columns, and various structural measures, construction split and installation schemes, and design calculation methods have been studied and resolved.

Reason for composite solution

1. The shear wall adopts composite components, the main purpose is to improve the bearing capacity of the wall. Compared with the concrete wall, it can reduce the amount of materials, thin the wall, and increase the effective indoor area; at the same time, the combined shear wall has better earthquake resistance. Performance can ensure the overall seismic ductility of the structure. The tower core tube of this project is one of the most critical anti-side components, so the composite wall with good bearing capacity and good seismic performance is the most suitable choice.
2. The columns of the tower are in the form of steel pipe concrete columns. On the one hand, it is to increase the bearing capacity to control and reduce the size of the column components; on the other hand, it considers the convenience of construction connection with the steel beams on the floor.
3. The floor of the tower is in the form of a combination of steel beams and concrete slabs. On the one hand, it is beneficial to improve the bearing capacity of the beam-slab system, thereby reducing the thickness of the structure and increasing the clear height of the building; on the other hand, it is also conducive to lightening the building The design of walls, columns, and foundations saves more materials; finally, the combination of steel beams and concrete floors can speed up construction, improve construction efficiency, and ensure that the project is completed on time.

Specific solution/technical details

1. The structure achieves the architectural effect. The Guangzhou Chow Tai Fook Center Building below L68 is used for office functions, L69 to L92 is the apartment floor, and L93 to the roof is the hotel and its supporting facilities. The height of the building is 530 meters. The structural design needs to be safe and implementable, and at the same time consider the overall effect and space of the building to achieve comprehensive functions. Many schemes have been studied and compared.
2. Structural system design scheme. The structural system of this project finally adopts the system of giant column frame + 6 ring trusses (including 4 outriggers) + core tube without setting giant supports. It is the only case of a building above 500 meters in China , the design needs to start from the basic principles of the structure, break through the existing norms and design experience, and solve many technical problems that were not involved in the norms at that time.
3. The application of C80 high-strength concrete. After many tests and expert demonstrations, we successfully used C80 high-strength concrete core wall for the first time in China’s 500-meter super high-rise building, breaking through the traditional limit of core wall concrete strength to C60 or below.
4. The design and construction of giant steel structures. The strength and thickness of the steel materials used in this project, whether it is giant steel pipe concrete columns, double-layer steel plate shear walls, double-layer trusses, and K-type outrigger trusses, were rare in mainland China at that time For this reason, in addition to referring to domestic and foreign technical experience in design, a series of expert demonstrations and process evaluations are required to ensure the practicality of the giant steel structure design.
5. The nodes of the giant columns and outrigger trusses of the building adopt an intrusive design to simplify the structure of the nodes and make the force transmission more direct. 6. Performance-based anti-seismic design, in addition to the design that meets the specifications, this project adopts a performance-based anti-seismic design method, so that the building can meet the predetermined performance goals under small earthquakes, moderate earthquakes and major earthquakes, and also ensures that the building The failure mechanism in extreme cases can meet the design requirements and has good ductility.
7. Test verification. In addition to the theoretical design, this project also carries out many experimental studies and demonstrations, including wind tunnel tests, double-layer steel plate C80 high-strength concrete composite wall tests, earthquake shaking table tests, etc.

Impact or effectiveness

The 530-meter height of Guangzhou Chow Tai Fook Financial Center makes it the tallest building in Guangzhou, the third tallest in China, and the seventh tallest building in the world. It occupies an important position on the skyline of Zhujiang New Town. The building is a collection of office buildings, hotels, entertainment, A comprehensive vertical city integrating catering and other facilities is an important milestone in the history of super high-rise buildings in the world and China. The tower adopts the structure system of outrigger giant frame-core tube, with 8 giant steel pipe concrete columns on the outside and concrete core tube on the inside, combined with the reinforcement layer layout of 4 outrigger trusses and 6 ring trusses, so that the structure meets the seismic design standards , and at the same time meet the functional requirements of the building, create a wider field of vision, and achieve the high-end quality requirements of the building. What makes this building amazing is not only its beautiful architectural shape and complex architectural function integration, but also its sophisticated and high-quality presentation, as well as the use of a large number of advanced and cutting-edge design and construction technologies. It won the 2016 National Science and Technology Award The second prize of the Progress Award and other honors.

References / Technical Papers Content

Zhao Hong, Lei Qiang, Hou Shengli, Lin Hai, Engineering application of eight-column megastructure in the over-limit design of Guangzhou East Tower, Building Structure, Beijing, 2012;
How was the Guangzhou East Tower built? https://mp.weixin.qq.com/s/hJ5HXzMcxQ07ik02TKnk9Q