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A Composite Interface Pre-tightened Connection High Performance Steel-UHPC Thin Plate Composite Structural System

A combined structure and high-performance technology, applied in bridge materials, buildings, bridge construction, etc., can solve problems such as complex construction process and inconvenient implementation

Active Publication Date: 2021-05-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these measures can reduce the self-weight of the structure to a certain extent, but at the same time make the construction process complicated and difficult to implement

Method used

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  • A Composite Interface Pre-tightened Connection High Performance Steel-UHPC Thin Plate Composite Structural System
  • A Composite Interface Pre-tightened Connection High Performance Steel-UHPC Thin Plate Composite Structural System
  • A Composite Interface Pre-tightened Connection High Performance Steel-UHPC Thin Plate Composite Structural System

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Embodiment

[0030] The invention is a composite interface pre-tightening connection high-performance steel-UHPC thin plate composite structure system and an interface connection technology adapted thereto. The structural system mainly includes the UHPC sheet 2 laid on the steel beam 1 and the large-diameter studs 3 and high-strength friction bolts 4 arranged on the steel beam 1. Finally, the large-diameter studs 3 are embedded in the UHPC sheet 2, The high-strength bolt 4 connects the UHPC thin plate 2 and the steel beam 1 as a whole through the nut 7 and the washer 8, and in the transverse direction of the interface, the connecting parts are symmetrically arranged about the longitudinal center line, and finally the steel beam 1 and the UHPC thin plate 2 pass through the interface. Composite shear connectors form a new composite structure system.

[0031] The numbers of studs 3 and high-strength bolts 4 are obtained by calculation. The studs 3 and bolts 4 are arranged at equal intervals a...

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Abstract

The invention discloses a combined structure system of high-performance steel-UHPC thin plate with composite interface pre-tightening connection. The ultra-thin bridge deck is mainly made of ultra-high performance concrete (UHPC), which is matched with high-strength steel to form a combined structure system, fully To give full play to the high-efficiency material properties of steel and UHPC, a new replaceable composite high-efficiency composite structure system is formed by mixing large-diameter studs and high-strength friction bolts at the steel-UHPC interface. In the hybrid connector, the large-diameter short nails are directly welded to the upper flange of the steel beam, while the high-strength bolts are connected with the UHPC sheet through the pre-embedded PVC pipe in the reserved hole on the steel beam to form a whole . When the present invention adopts UHPC as the bridge deck material, it can reduce the self-weight of the structure and enhance the spanning ability of the structure. At the same time, when the interface uses a combination of large-diameter short nails and high-strength bolts as shear members, the synergistic advantages of stud and bolt connections can be brought into play.

Description

technical field [0001] The invention belongs to the field of combined structures in the field of civil engineering, and in particular relates to a combined structure system of high-performance steel-UHPC sheet with composite interface pretension connection. Background technique [0002] The traditional steel-concrete composite structure mainly uses steel girders and ordinary concrete bridge decks to form a composite cross-section through shear connectors such as studs. Compared with the steel bridge structure system, the composite structure bridge can reduce the structural cost. Compared with the concrete bridge, Composite structure bridges can effectively reduce the structural weight. Therefore, this structural system gives full play to the advantages of steel structure and concrete structure in terms of construction performance and mechanical performance, and at the same time has good economy. However, studies by domestic and foreign scholars have shown that ordinary stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/12E01D101/26E01D101/30E01D101/40
Inventor 王景全徐启智姚一鸣张凡李雁
Owner SOUTHEAST UNIV
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