Assembled pier using mixed reinforcements of ordinary steel bars and screw-thread steel bars

A technology of fine-rolled threads and ordinary steel bars, which is applied in the direction of erecting/assembling bridges, bridge parts, bridges, etc., can solve the problems that it is difficult to simultaneously reduce the maximum displacement response and post-earthquake residual displacement, so as to achieve rapid bridge construction and improve piers Self-resetting ability, reducing the effect of maximum displacement response

Inactive Publication Date: 2018-07-24
HENGQIN GONGE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, the present invention is to provide an assembled pier and a construction method of mixed reinforcement of ordinary steel bars and fine-rolled threaded steel bars, which solves the problem that in the existing assembled pier technology, it is difficult to simultaneously reduce the maximum pier vibration. Displacement Response and Post-Earthquake Residual Displacement Problem

Method used

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  • Assembled pier using mixed reinforcements of ordinary steel bars and screw-thread steel bars
  • Assembled pier using mixed reinforcements of ordinary steel bars and screw-thread steel bars
  • Assembled pier using mixed reinforcements of ordinary steel bars and screw-thread steel bars

Examples

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Effect test

Embodiment 1

[0025] Example 1, such as figure 1 As shown, the present invention provides an assembled pier with mixed reinforcement of ordinary steel bars and fine-rolled threaded steel bars, including concrete caps (1), assembled pier body (2), through longitudinal bars (6) and unbonded prestressed bars (7). The assembled pier body is formed by stacking a certain number of individual prefabricated segments (4) vertically, and is stretched by unbonded prestressed tendons (7) to form the pier as a whole. Each prefabricated segment (4) has a rectangular section with the same size, and each segment has the same height. The segment height is twice the long side of the section, so that the plastic hinge of the pier can be fully developed to ensure the seismic energy dissipation capacity, and the volume and weight of a single segment can be small and easy to assemble. Such as figure 2 As shown, each prefabricated segment (4) is arranged with the same number of reserved corrugated channels (...

Embodiment 2

[0026] Example 2, such as Figure 5As shown, the difference between this embodiment and the foregoing embodiment 1 is that the pier body of the assembled pier with mixed reinforcement of common steel bars and finished rolled threaded steel bars has only one prefabricated segment (4). When the slenderness ratio of the pier is not greater than 6, the entire pier body can be prefabricated as a whole segment, which can improve the efficiency of pier assembly. Moreover, since the slenderness ratio of the pier is not greater than 6, the size and weight of the entire segment will not be too large to be difficult to transport and assemble. When adopting the same or similar design and construction scheme as in Example 2, it should be noted that the size and weight of the prefabricated pier body segments meet the relevant traffic regulations and do not exceed the tonnage limit of the hoisting and lifting equipment.

Embodiment 3

[0027] Example 3, such as Figure 6 As shown, the difference between this embodiment and the foregoing embodiment 1 is that ordinary steel bars and finished rolled threaded steel bars only pass through several sections of the lower part of the assembled pier body 2, and are not arranged along the entire pier body. For cantilever piers, the bending moment at the bottom of the pier is the largest under earthquake action, and the bending moment gradually decreases from the bottom of the pier upwards. During seismic design, according to the distribution of pier bending moment, the longitudinal reinforcement ratio can be gradually reduced, and finally cut off at a reasonable height. The determination of the truncation position of the longitudinal reinforcement shall comply with the provisions of the corresponding seismic design codes. When the height of the assembled pier with mixed reinforcement of ordinary steel bars and fine-rolled threaded steel bars is large, the adoption of ...

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Abstract

The invention provides an assembled pier using mixed reinforcements of ordinary steel bars and screw-thread steel bars. The assembled pier using the mixed reinforcement of the ordinary steel bar and the screw-thread steel bar comprises a concrete pile cap (1), assembled pier bodies (2), a through longitudinal bars (6) and an unbonded prestressing tendon (7) and is characterized in that the throughlongitudinal bars (6) are obtained by mixing the ordinary steel bars and the screw-thread steel bars; and the through longitudinal bars (6) and the unbonded prestressing tendon (7) connect the concrete pile cap (1) with each assembled pier body (2) to form a complete pier system.

Description

technical field [0001] The invention relates to a prefabricated segmental assembled concrete pier, in particular to an assembled pier with mixed reinforcement of ordinary steel bars and fine-rolled threaded steel bars. Background technique [0002] The collapse of bridges caused by natural disasters such as earthquakes and wars also requires rapid bridge construction technology for emergency reconstruction. The prefabricated segmental assembly bridge system has become one of the effective solutions to meet the above needs, and its good application prospects benefit from the following main advantages: (1) Most of the components are industrialized and mechanized, with outstanding construction efficiency; (2) The on-site construction period is short and is less affected by seasons and weather; (3) The component manufacturing and maintenance conditions are good, so the durability is high, and the maintenance cost of the whole life cycle is reduced; (4) The ecological environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/02E01D21/00
CPCE01D19/02E01D21/00
Inventor 王震宇蔡忠奎
Owner HENGQIN GONGE TECH CO LTD
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