Inverted arch beam string structure roof of large-span steel structure and construction method thereof

Abstract

The invention discloses an inverted arch beam string structure roof of a large-span steel structure. The inverted arch beam string structure roof comprises a set of unit beams distributed in parallel, and purlins vertically distributed between the adjacent unit beams. Each unit beam comprises a beam spring structure and an inhaul cable located on the lower portion of the beam spring structure, wherein a plurality of supporting rods are arranged between the beam spring structure and the inhaul cable. The upper ends of the supporting rods are fixedly connected with the beam spring structures through pin shafts, and the lower ends of the supporting rods are fixedly connected with the inhaul cables through steel casting rigging. Roof crossed supports are arranged between the beam spring structures of the roof. The beam string structure roof is reasonable in structural design, and the inhaul cables are fixed through the steel casting rigging so that the slide phenomena can be prevented; meanwhile, the invention further provides an installation method, and the stability of the whole structure is ensured through the inclined inhaul cables and the crossed supports of the roof; the segmented installation method is reasonable and effective, and it is ensured that the whole structure is smoothly constructed.

Description

technical field [0001] The invention relates to the technical field of steel structure buildings, in particular to a large-span steel structure reverse-arched string beam roof and a construction method thereof. Background technique [0002] At present, steel structures are more and more widely used in the field of civil engineering construction technology. However, as long-span roof structures are being used more and more, due to the sharp increase in their own weight, the overall structure is facing contradictions between the use function, design rationality and economic indicators. In order to meet the use function of the structure, reduce the The self-weight of the structure, improving the structural rigidity, and the prestressed string beam structure with cables are more and more used in large steel structure buildings. Through the arrangement of prestressed cables and struts, the bearing capacity and stiffness of the large-span space steel structure have been greatly i...

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Problems solved by technology

[0003] For the reverse-arched string beam, the main beam of the string beam is in a concave arrangement, and the cables are mostly fixedly connected to the main beam by means of lug plate pivot pin connection. Since the cables need to be bent at a relatively large angle, the yield strength to be overcome is also relatively large. It is relatively large, so it causes great difficulty in the installation of the cable; at the same time, due to the reverse arch design, the angle between the cable and the strut is relatively large, which is easy to cause relative slippage, so how to better ensure the fixation problem problems to be resolved

In addition, because the overall span of the anti-arch string beam is relatively large, and the weight of the roof structure is relatively large, the traditional hoisting method cannot meet the construction requirements, and it is also difficult to ensure the processing accuracy

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