Space constraint multi-cavity pipe-in-pipe steel bar concrete huge column and construction method

Abstract

The invention relates to a space constraint multi-cavity pipe-in-pipe steel bar concrete huge column and a construction method. A huge column comprises a core steel pipe concrete part and a steel-encased pipe concrete part. A core steel pipe forms an inner cavity. The inner cavity is filled with inner cavity concrete, and a steel bar frame is arranged through the middle part of the inner cavity. The core steel pipe and the steel-encased pipe form an outer cavity. The outer cavity is filled with outer cavity concrete, and at least a steel bar frame is arranged through the outer cavity. The core steel pipe and the steel-encased pipe are connected through a vertical connection plate and form a space steel pipe structure. The outer steel pipe of the huge column is connected with the inner steel pipe through the vertical connection plate, the space steel pipe structure is formed, and the force bearing performance of traditional steel pipe concrete can be raised effectively. The huge column has a strong anti-pressure capability, steel and concrete combined action performances are good under action of long-term load. The huge column has good earthquake resistant behavior, fireproof performance and construction convenience.

Description

technical field [0001] The invention relates to a steel pipe concrete giant column and a construction method, in particular to a space-constrained multi-cavity pipe-in-tube reinforced concrete giant column and a construction method. Background technique [0002] With the continuous increase in the scale of urban buildings and the requirements of anti-seismic technology, more and more concrete-filled steel tube structures are used. The commonly used concrete-filled steel tube is a steel tube, and the way of pouring concrete inside, but there are also some problems, due to the shrinkage and creep of concrete. Problems, especially for large-scale concrete-filled steel pipe columns, the steel pipe has limited constraints on the concrete, and after the concrete shrinks, there are micro-cracks with the steel pipe, which may cause the concrete and steel pipe to be unable to bear the force at the same time to achieve the predetermined force effect. How to find a structure and constr...

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Problems solved by technology

[0004] Especially when the cross-section of the column is larger, the above structure still has the following problems: insufficient compressive capacity, insufficient ductility, poor structural integrity, and poor ability to withstand large earthquake loads. The load shared by the outer peripheral structure is relatively small, so the section size of the giant column is limited, and because the section size of the giant column cannot be too large, the section size of the cavity formed by the outer steel pipe cannot be too large. Therefore, for the convenience of construction , the internal reinforcement cage is divided into two parts, one part is a continuous reinforcement cage arranged along the length of the cavity, and the other part is a reinforcement cage (reinforcement skeleton) located between adjacent transverse partitions, which can only be intermittent

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