What is the principle of making the space frame

In normal life, if the structure of the space frame structure has a large span, the height of the space frame structure will increase to a certain extent. Therefore, for a large-span structure, the space of the hollow space frame layer can be used as a separate building The layer is used.
This kind of open-web space frame is both a structural layer and a building layer. At the same time, the space frame layer has a large spanning ability, which makes the new structural system have the architectural function of large and small spaces intersecting each other, which overcomes the previous large space standing at the bottom of the building Or some building limitations on the top floor, especially suitable for large-span, high-rise buildings.
The technological characteristics of the high-altitude bulk method, The space frame assembly and the implementation of skipping layers. The hollow web space frame structure is a new type of space structure system developed from the hollow web space frame structure system. The space frame processing of the structure system is composed of the hollow web space frame layer and the supporting hollow web space frame.
Space frames or space trusses are arranged vertically alternately. This article systematically researches the new spatial structure system from the aspects of structure system composition, static characteristics and seismic performance. The composition of different structures makes the structure have different stress characteristics. Based on the common skip-floor open-web grid structure, this paper analyzes and studies the addition of oblique webs around the space frame, the unequal spacing of the space frame, and the support of the space frame.

The internal force distribution and deformation of different types of skip-floor open-web space frame structures such as space trusses under vertical and horizontal loads. At the same time, the internal force and deformation changes of the structure when the floor is involved in work and prestressing are further analyzed. The conclusion of processing analysis and calculation provides a theoretical reference for the selection and design of the structure in engineering design. After studying the force characteristics of the structure under vertical load in detail, this paper takes into account the shear deformation of the cross beam system flexibility method and the layered method of the multi-layer frame under the vertical load, and proposes. The simplified analysis method of skip-floor open-web space frame structure has made a great improvement to the simplified method proposed by some scholars in the past. This method has higher calculation accuracy and is especially suitable for the preliminary design of the structure. For skip-floor open-web space frame structures, the usual concept is that the structural system has poor collapse resistance under strong earthquakes.

The processing of the space frame,The influence of the change of frame stiffness and supporting structure stiffness on the natural frequency and mode shape of the structure. At the same time, this paper uses the response spectrum method to study the seismic performance of the structure when the three directions of the earthquake are excited separately and simultaneously. The internal force and deformation of the structure under the action of the earthquake are obtained. Reasonable mode shape interception order. In addition, this paper uses time-history analysis to study the linear elastic response of jump-storey hollow space frame structure under frequent earthquakes and the elastoplastic response under rare earthquakes. The elastoplastic response of the structure under rare earthquakes shows that under the conditions of selecting the appropriate cross-section and reinforcement ratio, the space frame processing of the structure system can meet the design principle of “no collapse in a major earthquake”. In addition, this paper also compares the analysis results of the response spectrum method and the time history method, which has a guiding effect on the seismic design of this new type of structural system. At the end of this article, the research work is summarized, and the problems to be solved in further research are pointed out.
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