Guangzhou Canton Financial Center

The project tower is a spatially slightly twisted ultra-high-rise modular curtain wall building, presenting a twisted and tapering form. In the four elevations, three small arcs with radius R=5m and one large arc with gradual change of radius are used for transition. At the two ends of the large arc, a 1.5m wide ribbon line is set up to close the transition, and the ribbon line extends from the ground to the crown of the tower and finally returns to the ground at the other end of the arc, thus realizing the effect of infinite circulation.

▲ Design Concept

As the building skin is complex, our team combined with the model provided by the program, and used BIM technology to parameterize several comparisons and studies on the compartmentalization of the skin, and finally determined the way of division. Through modeling analysis, it can be learned that the tower slab is basically a four-point non-coplanar warped surface above 35F.

▲  Body type analysis

For the curved unit body part of the tower, after parametric analysis, it was optimized and simplified, and the overall flat plate fitting was used. For the four-point non-coplanar part, a combination of cold bending method and staggered insertion method is used to realize for different warpage values.

Tests have proved that the effect of on-site cold bending is better than factory cold bending, factory cold bending of the plate, there will be different degrees of rebound for various reasons. When the warpage value is less than 1/60 of the short side, it can be initially determined that the cold bending method does not have too much risk, so the warpage is less than 20mm, the cold bending method.

For warpage greater than 20mm, use staggered insertion method.

The tower adopts unit curtain wall design for overall installation, with decorative lines of metal panels at both ends of the large circular arc, and plane steel trusses set up between floors still adopts aluminum panel unit curtain wall, aiming to make all tower panels assembled in the factory to improve project quality and ensure landing.

▲ realistic picture

The design of the first floor façade of CFC shows a different kind of ingenuity. The wave canopies, which are crafted at three times the cost of conventional office tower canopies, can not only achieve the function of shading the sun and avoiding rain, but also greatly enhance the overall flow of the building's line beauty, showing the style of the enterprise.

The project team solved the integration design problems of curtain wall, steel structure, space curved wave awning curtain wall and vertical shaped space metal sunshade curtain wall by means of parametric design, and finally realized the facade effect better.

▲  Modeling Schematic

▲  realistic picture

The configuration of BMU in super high-rise buildings has always been a key consideration, firstly, it needs to be coordinated with the design of the parking location to minimize the impact on the aesthetics of the building. Secondly, it needs to be clear that the main purpose of this system is to complete the maintenance work, followed by cleaning work, so that the cost can be controlled within a reasonable range.

Due to the project from the elevation of 305m to 319.5m micro-twisting, plus the top of the helicopter platform space, etc., the BMU action space caused great difficulties, in a wave of twists and turns in the optimization of a number of programs, the final landing program in the window cleaning machine inclined climbing angle of about 12 degrees.

▲  Model Collision Detection Diagram

In order to reduce the difficulty of inclined climbing, improve the safety of the whole system and reduce the construction difficulty, we adopt the track arrangement scheme of flat section turning and straight section slanting slide.

▲  Track Layout

Final landing effect:

▲  realistic picture