ROOFING CONSTRUCTION TECHNOLOGY OF SADDLE-SHAPED OVERHANGING STEEL STRUCTURE RETICULATED SHELL SKIRT BUILDING OF HANGZHOU GATE SUPER HIGH-RISE BUILDING



 Hangzhou Century Center, which is the tallest building under construction in Hangzhou and the tallest twin tower building in the Hangzhou Bay area, is known as the gate of Hangzhou. The wings of the two towers of Hangzhou Gate, together with the surrounding Olympic Sports Center, natatorium, International Expo Center, as well as the civic center, international Convention center, and grand Theater on the other side of the Qian River, form a "seven-star bright" urban picture. The Gate of Hangzhou is like a cloud floating in the seven stars, with a strong sense of design and visual impact.  

The main body of Hangzhou Gate is composed of symmetrical 63-story east and west towers, with a building height of 302.6m and a total construction area of about 532,500 square meters. The east and west towers are connected by steel arch Bridges on the 1st to 6th floors above ground. The maximum span of the bridge is 85m at the north and south ends, the minimum span is 55m in the middle, the width is 60m from south to north, and the arch height is 19m. The arch feet are supported on the steel-concrete columns set independently in the basement of the tower. The whole steel arch bridge is completely wrapped by the saddle-shaped suspended steel structure reticulated shell roof and the suspended side walls on the north and south sides (referred to as "suspended roof"). The suspended roof is cantilevered from the end of the cantilevered steel truss on the edge sealing beam on the 22nd floor (elevation 103.45m) of the twin towers to the corresponding height on the 7th floor of the tower, with a maximum suspension height of 65m. The cantilever roof is mainly composed of 47 parabolics "catenary lines" with different lengths from east to west and 39 transverse parabolic connecting beams from south to north. Both catenary lines and transverse connecting beams are made of H-shaped steel. Cylindrical steel drum joints are designed at the nodes of the mesh shell. The overhanging roof and side walls are supported by three horizontal tie rods on the 11th, 14th, and 18th floors of the east and west towers to provide lateral restraint. The overhanging roof realizes the perfect transition between the curved facade of the towers on both sides and the roof of the steel arch bridge, fully displaying the beauty of the spatial curved surface.  

The cantilevered roof of Hangzhou Gate is a super-high-altitude cantilevered steel structure reticulated shell with a large area and unique shape, which is the most difficult and complex part of the whole project. It has the following typical structural characteristics:  

(1) Overhanging stress system: The dead weight load of the entire overhanging roof is entirely borne by the steel truss suspension extending from the 22-floor edge sealing beam of the east and west towers, while the lateral three horizontal tie rods only play a role of restraint and do not bear the vertical load.  

(2) Saddle-shaped space frame structure curved surface, the maximum height difference of a single catenary in the east-west direction is nearly 65m, and the maximum height difference of a single connecting beam in the south-north direction is nearly 10m, indicating great spatial curvature.  

(3) Semi-rigid space reticulated shell, single catenary twisted by multi-segment h-shaped steel through steel drum joints rigid connection to fit, suspended roof not only has the flexibility of catenary structure but also maintains a certain stiffness.

评论

发表评论

此博客中的热门博文

Several cutting methods of steel structure space frame

图片
  Steel st ructure space frame s are now widely used, such as galvanized steel warehouse , glass dome building , airport hangar ,steel structure warehouses, hall roofs, gymnasiums, etc. The builder will cut, produce, and process according to the customer's requirements. There are many ways to cut steel structure space frame s, which will help you to have more choices of cutting. Then, the space frame   manufacturers below will give us a detailed description of several common cutting methods. The cutting methods of the steel structure space frame   are as follows: 1. Flame cutting by CNC machine tools: that is to say, use oxygen cylinders to oxidize and melt steel at a high temperature continuously. At present, natural gas is generally available, which is relatively reliable. 2. Waterjet cutting machine: Generally, high-pressure flowing water is used for cutting, and the accuracy is very high. It is often cut in some very thin, medium-thick steel that requires precision m...
阅读全文

What are the advantages of steel over traditional concrete?

图片
  steel warehouse Steel structures offer several advantages over traditional concrete structures that cover a wide range of areas, including speed of construction, flexibility, sustainability, and more. Here are some common advantages of steel construction:   Lightweight and High Strength: Steel is a lightweight and strong building material. Compared to concrete, the use of steel reduces the dead weight of the building, which in turn reduces the load on the foundation and lowers the overall weight of the building.   Fast construction: Steel structures can be prefabricated in a factory and then simply assembled on site. In contrast, traditional concrete structures typically require more on-site pouring and maintenance time. As a result, steel structures are often faster to construct, helping to shorten project duration.   Design Flexibility: Steel structures are strong and malleable and can support large spans and diverse building designs. This gives designers more f...
阅读全文

Space frame cost control

图片
  With the continuous improvement of socialist productivity, various industries are developing in the direction of rapid development, so is the steel space frame engineering industry. Due to the Therefore, we should attach great importance to the  space frame cost  management, because the project involves many aspects and fields, and only through reasonable project space frame cost management, can we ensure the quality of the last step of the project. Therefore, we should fully realize that dynamic management and control of project cost is a very important work content and link. In order to improve the quality level of steel grid engineering, dynamic management and control of project cost should be further strengthened. Optimizing the investment process is the most critical link in the steel space frame. the same time, it is also a very important aspect in the process of space frame construction cost management. Therefore, active and effective measures should be take...
阅读全文