Post-tensioned prestressed prefabricated type concrete composite beam reinforcing steel bar structure and design method thereof

Abstract

The invention provides a post-tensioned prestressed prefabricated type concrete composite beam reinforcing steel bar structure and a design method of the post-tensioned prestressed prefabricated typeconcrete composite beam reinforcing steel bar structure. The post-tensioned prestressed prefabricated type concrete composite beam steel reinforcing bar structure comprises beam lower part reinforcingsteel bars, waist ribs, beam upper part reinforcing steel bars, stirrups and prestressed tendon strands. The beam lower part reinforcing steel bars comprise beam lower part constructional reinforcingsteel bars distributed on the two sides of a cross section of a prefabricated layer, and the beam lower part constructional reinforcing steel bars are arranged in the longitudinal direction of the prefabricated layer in a full length manner. The beam upper part reinforcing steel bars comprise beam upper part energy dissipation reinforcing steel bars and beam upper part constructional reinforcingsteel bars, wherein the beam upper part constructional reinforcing steel bars are arranged in the span middle part of a post-poured superposed layer in parallel at intervals, the beam upper part energy dissipating reinforcing steel bars are arranged at the two ends of the post-poured superposed layer, the outer end of each beam upper part energy dissipating reinforcing steel bar exceeds the end ofthe post-poured superposed layer and is connected with a reinforcing steel bar connection device, and the inner end of each beam upper part energy dissipating reinforcing steel bar is in lap joint with the corresponding beam upper part constructional reinforcing steel bar. The prestressed tendon strands are arranged below the middle axis of the prefabricated layer and are distributed in a straight line shape. The ends of the prestressed tendon strands are anchored into prefabricated columns on the two sides of the composite beam. The post-tensioned prestressed prefabricated type concrete composite beam reinforcing steel bar structure solves the problems that a traditional post-tensioned prestressed prefabricated type concrete frame structure system is complicated in component and low in construction efficiency, the construction cost of the traditional post-tensioned prestressed prefabricated type concrete frame structure system is higher than a traditional assembly type system, and the anti-seismic performance of the traditional post-tensioned prestressed prefabricated type concrete frame structure system is poor.

Description

technical field [0001] The invention belongs to the field of reinforced concrete structure design, in particular to a post-tensioned prestressed assembled concrete composite beam steel bar structure and a design method thereof. Background technique [0002] The post-tensioned prestressed prestressed prefabricated concrete frame structure system with hybrid connection has good self-resetting ability and excellent seismic performance, and has been accepted by the standards of the United States, New Zealand and Europe. However, from the perspective of engineering construction, the structure of the system is still relatively complex, the construction efficiency is not high, and the cost is relatively high compared with the traditional prefabricated system. These factors have greatly affected its promotion and application. [0003] On the basis of mixed connection prestressed prestressed concrete frame structure system, there is a method of crimping frame beams and columns (inven...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a post-tensioned prestressed assembled concrete composite beam steel structure and its design method, to solve the problem that the traditional structure is still relatively complicated, the construction efficiency is not high, the cost is relatively high compared with the traditional assembled system, and the earthquake resistance Technical issues with poor performance

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