Dislocated welding type web punched prefabricated wrapped castellated beam

Abstract

The invention discloses a dislocated welding type web punched prefabricated wrapped castellated beam which comprises a steel framework and a prefabricated concrete layer. The steel framework is a framework shaped like Chinese character 'ri' and is composed four main beams and one auxiliary beam. Each I-shaped beam is cut and divided into two steel beams with one side edges provided with teeth along a preset folded line on a web of the I-shaped beam, wherein the sides, provided with the teeth, of the two steel beams are welded in a dislocated manner to form one main beam or the auxiliary beam with the web provided with a hole. The prefabricated concrete layer is wrapped on the lower flanges and part of the webs of the main beams and the auxiliary beam. During construction, the prefabricatedwrapped castellated beam is conveyed to a construction field, a profiled steel sheet is arranged on the prefabricated concrete layer parallel to the main beams and the auxiliary beam in a lapped manner, the profiled steel sheet is adopted as a platform, and a pipeline is arranged by penetrating the exposed hole; cast-in-place concrete is adopted, and a cast-in-place concrete layer wrapped on theprofiled steel sheet, the pipeline, the upper flanges and the rest of the webs of the main beams and the auxiliary beam is formed. By means of the dislocated welding type web punched prefabricated wrapped castellated beam, the inertia moment and the flexural capability of a section of the castellated beam are large, and the good energy consumption capability is achieved under the earthquake load effect.

Description

technical field [0001] The invention relates to the technical field of building components, in particular to a prefabricated wrapped honeycomb girder with misaligned welded web openings. Background technique [0002] my country's annual urban and rural housing area is 2 billion cubic meters, of which more than 80% are high-energy buildings, and the energy consumption per unit building area in my country is more than twice that of developed countries. According to the statistics of the China Iron and Steel Association, my country's steel output reached 800 million tons in 2016, ranking first in the world since 2000. Correspondingly, the current domestic construction industrialization level is less than 10%, while the steel structure construction area in developed countries accounts for the total construction area. More than 50%, Japan accounted for 80%. As the country with the largest construction scale and steel output in the world, China lags behind seriously in the develop...

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Problems solved by technology

[0003] Nowadays, the composite beam floor slabs used in buildings in my country mostly adopt the traditional cast-in-place construction method. The steel beams located under the floor slabs are solid-web type, and the amount of steel used is large, resulting in limited beam height. If the flanges are weakened or the webs are opened, further considerations must be made. Instability problems, and steel beams are easy to rust, not resistant to high temperature, anti-corrosion, fire prevention and other issues are particularly important; steel beams and floor slabs need to be connected with each other, and pouring concrete floors on site requires a lot of formwork, which consumes manpower and material resources; most of the pipelines used in construction are in Below the beams and slabs, the headroom of the building is reduced and the indoor space is occupied; under loads such as earthquakes, the floor at the support is the control section, which bears negative bending moments, and the reinforced concrete is in tension and is prone to damage; in addition, The beam-slab section is T-shaped, and the beam height is the sum of the steel beam height h0 and the floor thickness L. The steel beam net height h0 cannot be expressed as the beam height, and the expression is easily confused

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