Engineered cementitious composite (ECC)-reinforced concrete (RC) combination column and novel connection mode thereof

Abstract

The invention discloses an engineered cementitious composite (ECC)-reinforced concrete (RC) combination column and a novel connection mode thereof. ECC is replaced with the conventional RC which is adopted in a node connection area in the conventional assembly integrated frame structure system so as to implement the ECC-RC combination column; H section steel with a certain length is pre-embedded in upper and lower prefabricated common concrete columns, a porous end plate is connected to the end of the H-shaped steel by bolts, and the self weight of the upper prefabricated common concrete column is supported by using the bolts and the section steel to ensure that the prefabricated columns are arranged in place; and after the columns are arranged in place, the perpendicularity of the columns is adjusted by leveling nuts which are arranged on the bolts, and the columns are fixed. According to the ECC-RC combination column, an external adjustable inclined strut is not needed to be used for correcting and fixing, a stirrup is not required, the occupying of the external adjustable inclined strut is avoided, the construction speed is increased, high construction quality and the seismic performance of the connection area are guaranteed, the ECC-RC combination column is reasonable in structure, and easy to design and construct, and the whole performance of the assembly integrated frame structure can be improved further.

Description

technical field [0001] The invention relates to an assembled monolithic structure in the field of building structures. Background technique [0002] Concrete frame structures can be divided into cast-in-place frames, prefabricated frames and prefabricated monolithic frames according to construction methods. [0003] The beams and columns of the cast-in-place frame are all cast-in-place, which has good integrity and seismic performance, but the construction period is long and labor-intensive, which is increasingly unfavorable for coping with the challenges brought about by the current rapid rise in labor costs. [0004] The beams and columns of the prefabricated frame are all prefabricated components, which are connected into a whole by welding and assembly, and the nodes are generally hinged. Since they are all prefabricated components, standardized, factory-like, and mechanized production can be realized, but the integrity of the structure is poor, and the anti-seismic abi...

AI Technical Summary

Problems solved by technology

[0006] However, the assembled monolithic frame also has its own shortcomings, mainly in the following two aspects: (1) The joint connection area is generally poured with ordinary concrete of the same grade or a higher grade, but limited by the low tensile strength of the ordinary concrete material itself, the extension In addition, it is necessary to arrange stirrups in the joint connection area and realize the overlapping of beam-column longitudinal reinforcement, resulting in difficulties in the layout of steel bars and difficulties in effectively ensuring the quality of concrete pouring. The bottleneck of the seismic performance of the structure, and limits the overall performance of the assembled monolithic structure; (2) such as figure 1 and figure 2 As shown, the prefabricated columns are usually connected by steel supports or reinforced connections through reserved holes. No matter which form is used, adjustable diagonal braces must be used to correct and fix the columns after they are in place. These diagonal braces must be used as a The concrete strength of the layer beam-column joints can only be removed after the strength reaches 10MPa, which further increases the difficulty of construction

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