Steel tube concrete column bent frame-reinforced concrete core tube structural system

Abstract

The invention relates to a steel tube concrete column bent frame-reinforced concrete core tube structure system. The steel tube concrete column bent frame-reinforced concrete core tube structure system comprises a plurality of steel bent frame beams, a plurality of steel tube concrete columns, a reinforced concrete core tube and several layers of concrete floor slabs. The two ends of part of steelbent frame beams are separately and vertically hinged with two steel tube concrete columns by bolts, and the two ends of part of steel bent frame beams are separately and vertically hinged with the steel tube concrete columns and shear walls of the reinforced concrete core tube by bolts; and each layer of concrete floor slab is erected on the steel tube concrete columns in the same horizontal plane to form an integral floor. The structural system is hinged by bolts for connecting joints of the steel bent frame beams, so that the on-site welding workload of the steel bent frame beams is greatly reduced or even remitted, and the construction speed is further improved. The seismic design control indexes of the structure, such as the limit value of the inter-story displacement angle is greatly relaxed, and the floor shear-weight ratio and the seismic shear sharing ratio of the steel tube concrete columns are adjusted, the structural vibration period is increased, and the seismic investment is reduced. The invention belongs to the field of high-rise building structures.

Description

technical field [0001] The invention relates to the field of high-rise building structures, in particular to a steel pipe concrete column bent frame-reinforced concrete core tube structural system. Background technique [0002] There have been many studies and engineering applications of the hybrid high-rise structural system of the outer frame (such as the steel tube concrete column frame, steel frame or reinforced concrete frame) and the inner reinforced concrete core tube at home and abroad, especially in super high-rise buildings. For the consideration of the second line of defense against earthquakes, the structural design codes stipulate the minimum value of the seismic shear force sharing ratio of the outer frame. Generally, the nodes of the outer frame (including outer frame columns and outer frame beams) are rigidly connected to fully protect the outer frame columns. It has certain lateral stiffness. However, in terms of structural design, it is not easy for the ou...

AI Technical Summary

Problems solved by technology

However, in terms of structural design, it is not easy for the outer frame to meet the requirement of the minimum seismic shear force sharing ratio. Usually, the section size of the outer frame columns needs to be increased to meet the requirements of this code. This method is likely to lead to "fat beams and fat columns", increasing construction costs and The construction workload, and severely restrict the column distance of the outer frame, restricting the innovation of the structural form

The rigid connection joints between concrete filled steel tube columns or steel frame columns and steel beams are usually mainly welded, which leads to a large amount of on-site welding workload, complicated installation, and long working hours, which offsets the advantages of fabricated steel frame beams to a certain extent

Images