Double steel pipe concrete beam-column joint with built-in frp bar connection device and its installation method

Abstract

The invention relates to the field of building structures. The double steel pipe concrete beam-column node with a built-in FRP tendon connection device of the present invention includes double steel pipe columns, I-beams, node connectors, inner braces and outer ring plates; the double steel pipe columns include inner steel pipes and the outer steel pipe; the node connectors include connecting the inner pipe and connecting the outer disk, both of which are round steel pipes; the inner support is a columnar structure, and bolt holes are evenly distributed along the circumference at both ends; the outer ring plate includes mutual The vertical horizontal part and the ring part; the upper and lower double steel pipe columns are connected by node connectors and inner supports. The inner pipe and the inner steel pipe are fixed in the bolt holes of the inner support. The invention utilizes the superior tensile performance and fatigue load resistance capacity of FRP tendons to effectively improve the seismic energy dissipation capacity of nodes and enhance the safety and bearing capacity of the structure.

Description

technical field [0001] The invention relates to the field of building structures, in particular to a double steel pipe concrete beam-column joint and an installation method for the joint. Background technique [0002] With the continuous advancement of social modernization, building structures continue to develop in a higher and larger direction. Due to their superior structural performance, steel tube concrete columns are widely used in high-rise and super high-rise buildings. Among them, double steel tube concrete columns are not only effective The self-weight of the structure is reduced, and it also has very good mechanical properties, and has great development potential and practicability. [0003] The joints of double-tube concrete columns are the key parts of column-to-column, beam-to-column connections, which are very important to the safety and structural performance of the entire structure. Most of the existing connection methods are direct welding of steel pipes. ...

AI Technical Summary

Problems solved by technology

Most of the existing connection methods are direct welding of steel pipes. The construction requirements of the welding site are high, and the quality is not easy to control. The welding residual stress is large. When an earthquake occurs, local buckling of the steel pipes may occur, resulting in excessive deformation of the joints and structural failure.

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