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Regenerated concrete segmented beam and construction method thereof

A technology of recycled concrete and construction methods, applied in the direction of joists, girders, truss beams, etc., can solve the problems that cannot be applied and promoted, reduce structural reliability, and use less, so as to ensure construction quality and mechanical performance, and good The effect of force performance

Active Publication Date: 2014-09-10
TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, recycled concrete also has defects such as large dispersion of mechanical properties and poor aggregate interlocking, which will reduce the reliability of the structure. Therefore, it is currently mostly used in non-structural components, and the amount of use is small, and it cannot be widely used in actual construction. and promotion

Method used

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  • Regenerated concrete segmented beam and construction method thereof
  • Regenerated concrete segmented beam and construction method thereof
  • Regenerated concrete segmented beam and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] 1 method

[0082] Through the cast-in-place method, comparing the influence of concrete mix ratio in different shear-dominant sections, design and pour segmental beam 1, segmental beam 2 and ordinary frame beam 1.

[0083] Such as figure 1 As shown in , the segmented beam is divided into a section dominated by bending moment and two sections dominated by shear force. The two sections dominated by shear force are respectively located on both sides of the section dominated by moment. pouring. Interface 1 and Interface 2 are set. Interface 1 is set between the moment dominant section and shear force dominant section, and interface 2 is set between the shear force dominant section and the frame column. Reinforcement cages include full-length steel bars, additional steel bars for supports, waist bars, and stirrups, which are built into segmented beams as skeletons. Segmented beams apply to frame or secondary beams in structural members, not to coupling or cantilever beams...

Embodiment 2

[0098] 1 method

[0099] Table 3 Mix ratio of natural concrete and recycled concrete used in construction

[0100]

[0101] Through the cast-in-place method, the effect of the concrete mix ratio in the sections with different bending moments is compared, and the pouring of segmental beams 1, 3, 4 and ordinary frame beam 1 is designed. Such as figure 1 As shown in , the segmented beam is divided into a section dominated by bending moment and two sections dominated by shear force. The two sections dominated by shear force are respectively located on both sides of the section dominated by moment. pouring. Interface 1 and Interface 2 are set. Interface 1 is set between the moment dominant section and shear force dominant section, and interface 2 is set between the shear force dominant section and the frame column. Reinforcement cages include full-length steel bars, additional steel bars for supports, waist bars, and stirrups, which are built into segmented beams as skeletons...

Embodiment 3

[0109] 1 method

[0110] Through the cast-in-place method, the effects of different length ratios of the dominant sections are compared, and the segmental beams 1 and 5 and the ordinary frame beam 1 are designed and cast.

[0111] Such as figure 1 As shown in , the segmented beam is divided into a section dominated by bending moment and two sections dominated by shear force. The two sections dominated by shear force are respectively located on both sides of the section dominated by moment. pouring. Interface 1 and Interface 2 are set. Interface 1 is set between the moment dominant section and shear force dominant section, and interface 2 is set between the shear force dominant section and the frame column. Reinforcement cages include full-length steel bars, additional steel bars for supports, waist bars, and stirrups, which are built into segmented beams as skeletons.

[0112] The pouring steps of the cast-in-place method are consistent with those in Example 1. Among them,...

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Abstract

The invention provides a construction method for a regenerated concrete segmented beam. The segmented beam is divided into a bending moment dominant section and two shearing force dominant sections, wherein the two shearing force dominant sections are respectively positioned on both sides of the bending moment dominant section, and the regenerated concrete segmented beam is cast in a sectional way by using the method of cast-in-place, semi-prefabrication and semi-cast-in-place, or semi-recycling and semi-cast-in-place. By adoption of the construction method, regenerated concrete is used as raw materials, the construction cost of structural members is reduced, the development of green buildings is promoted, and a reliable and large-scale recycling and reuse way for waste materials of concrete is found. Simultaneously, the construction method has the advantages of simplicity and practicability, and convenience in construction; the project quality is ensured, the construction speed is increased, and the construction period is shortened. Besides, the regenerated concrete segmented beam cast by the construction method has the advantages of good stress performance, simple structure, high reliability and high practical value.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a recycled concrete segmental beam and a construction method thereof. Background technique [0002] As one of the most widely used engineering composite materials, concrete is widely used in the construction of houses, water conservancy and municipal projects. It is obtained by using cement as the cementitious material, sand and stone as the aggregate, mixed with water (may contain additives and admixtures) in a certain proportion, and stirred. In the composition of concrete, coarse and fine aggregate is the main component of concrete, and its source is basically natural sand and stone at present. However, in the production process of natural aggregate, it is necessary to open mountains and quarry or salvage a large amount of river and sea sand, which will inevitably cause serious environmental damage to nature. In order to protect the environment and develop a gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/20E04G21/02
Inventor 肖建庄林壮斌
Owner TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
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