Risk control method for the whole cycle of reverse construction of single-layer flat reticulated shell roof structure

Abstract

The invention relates to the field of large-scale public building construction, and discloses a risk control method for the entire period of reverse construction of a single-layer flat reticulated shell roof structure, including determining the construction process of reverse lifting the reticulated shell roof; using finite element software to establish an overall Structural model; through time-varying mechanical analysis, the stress state of each stage of structure construction is previewed to carry out risk control in the construction process and use stage; the construction process of the reverse lifting flat reticulated shell roof includes: installing temporary lifting brackets; The shell roof reaches the design position; the risk control of the construction process includes: wind load control; synchronous lifting control of each lifting point; overall stability control and continuous collapse prevention control; the risk control of the use stage includes: carrying out Elastic control for small earthquakes; elastic control for moderate earthquakes. The invention can avoid various potential risks in the reverse construction of the single-layer reticulated shell roof structure, increase the ability of the structure to resist sudden disasters, and ensure the safety of the structure in the whole cycle.

Description

technical field [0001] The invention relates to the field of large-scale public building construction, in particular to a risk control method for the entire cycle of reverse construction of a single-layer flat reticulated shell roof structure. Background technique [0002] In large public buildings, a single-layer flat reticulated shell structure is often used as the roof structure. In the prior art, adopting the reverse method to integrally upgrade the single-layer flat reticulated shell roof structure can speed up the construction progress and ensure the welding quality. In the overall reverse lifting process of the single-layer flat reticulated shell roof structure, its resistance system is incomplete and the construction risk is high; even if the construction is safe, there may be a large "additional" internal force hidden in the structure due to improper construction methods. Buried safety hazards for the structure use stage. The conventional structural design analysi...

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Problems solved by technology

[0003] In order to overcome the problem that the conventional flexible single-layer flat reticulated shell structure design and analysis method does not consider the influence of the structure construction and forming process on the structure use stage, resulting in relatively large safety hazards in the structure construction process and use stage; the invention provides a single-layer The risk control method for the whole cycle of reverse construction of flat reticulated shell roof structure, considering the construction forming process and the impact on the use stage, avoiding various risks in the process of reverse construction of single-layer flat reticulated shell roof, and ensuring the structure in the whole cycle Safety, its specific technical scheme is as follows

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