Large-span large-cantilever roofing cable-stayed type double-layer prestressed steel grid roof structure

Abstract

The invention relates to a large-span roof incline dual-layer pre-stress steel net cover, which comprises a dual-layer steel net support (1); the upper arc node of the base of steel net support (1) is arranged with support (2); the top of support (2) is arranged with crown block (3); the low arc node at the middle of steel net support (1) is arranged with force sensor (5); two ends of pre-stress steel cable (4) are through the crown block (3) and force sensor (5), to be fixed on the low arc node of suspension net support of steel net support (1). The invention can be used in the roof cover whose span is between 100m to 160m, to improve the rigidity of steel net support, reduce the steel consumption and reduce the cost.

Description

Technical field: [0001] The invention relates to a roof structure, in particular to a cable-stayed double-layer prestressed steel grid roof structure with a large span (100m≤L≤160m) and a large overhang (L≥12m). Background technique: [0002] For large buildings with large spans (100m≤L≤160m) and large overhangs (L≥12m), when the roof is designed as a flat roof, due to the large span, if a general flat steel grid is used, the height of the grid is relatively high. The length of the diagonal web bars of the grid frame is too long, resulting in an increase in steel consumption; in order to reduce the steel consumption, at present, three-layer steel grid frames are generally used for large-scale building roofs with large spans and large overhangs to reduce the amount of diagonal webs. However, one layer of the three-layer steel grid is in the neutral layer of the structure, which contributes almost zero to the bending stiffness of the structure, and the increase of the grid mem...

AI Technical Summary

Problems solved by technology

[0002] For large buildings with large spans (100m≤L≤160m) and large overhangs (L≥12m), when the roof is designed as a flat roof, due to the large span, if a general flat steel grid is used, the height of the grid is relatively high. The length of the diagonal web bars of the grid frame is too long, resulting in an increase in steel consumption; in order to reduce the steel consumption, at present, three-layer steel grid frames are generally used for large-scale building roofs with large spans and large overhangs to reduce the amount of diagonal webs. However, one layer of the three-layer steel grid is in the neutral layer of the structure, which contributes almost zero to the bending stiffness of the structure, and the increase of the grid members and nodes of the neutral layer is about 1 / 3 of that of the double-layer grid. It uses a large amount of steel, which has been proved by engineering practice

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