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Construction method of composite beam integrally formed by 3D printing and knitting and composite beam

A 3D printing and construction method technology, applied in the construction method of composite beams and the field of composite beams, can solve the problems that the printed structure is difficult to break through the space span and bearing capacity, and the tensile strength and toughness are insufficient, so as to improve the space spanning ability and enhance Fracture toughness and impact resistance, improved tensile effect

Active Publication Date: 2019-01-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the above-mentioned insufficient tensile strength and toughness of the existing 3D printing substrates, it is difficult for the printed structure to break through the limitations of space span and bearing capacity. It is necessary to develop new beam-type components for these deficiencies to solve the problem of existing 3D construction technology. The shackles of architectural design

Method used

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  • Construction method of composite beam integrally formed by 3D printing and knitting and composite beam
  • Construction method of composite beam integrally formed by 3D printing and knitting and composite beam
  • Construction method of composite beam integrally formed by 3D printing and knitting and composite beam

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Effect test

Embodiment 1

[0051] Such as figure 1 and figure 2 Shown, a kind of design and construction method of the composite beam of 3D printing weaving integrated molding, comprises the following steps:

[0052] (1) Determine the beam span, beam height, and beam width. According to the hinged support state of the beam at both ends, the design value of the uniformly distributed load and the concentrated load, after the space modeling, the finite element analysis is adopted, combined with the stress cloud diagram, and the discriminant domain is set By gradually removing low-stress parts and optimizing the space shape, the design scheme of composite beam components can be initially obtained, such as image 3 shown. right image 3 The six schemes shown are calculated and analyzed. After comparing the maximum principal tensile stress and safety factor of the structure under each scheme, it is found that the maximum tensile stress of the first scheme is the smallest and the safety factor is the large...

Embodiment 2

[0060] In this embodiment, weaving and weaving the external mold of the composite beam component (the external mold of the composite beam component is also called the composite beam external mold) through 3D printing, and then building steel bars and pouring concrete to obtain the composite beam, which specifically includes the following steps:

[0061] 1. Determine the beam span, beam height, and beam width. According to the hinged support state of the beam end and the design value of the load during the construction stage, determine that the area where the composite beam is prone to tensile cracking and large deformation during the construction stage is the weaving reinforcement area during printing; Determine the thickness of the outer mold of the 3D printed beam, and determine the braiding amount of the wire according to the stress of the outer mold area of ​​the component after the load combination and the safety factor.

[0062] In this embodiment, the structure of the co...

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Abstract

The invention discloses a construction method of a composite beam integrally formed by 3D printing and knitting and the composite beam. The construction method comprises the steps that modeling is performed for force analysis, beam member spatial shape optimization is performed, and the shape and thickness of a composite beam member skeleton or a composite beam member external mold are determined;a knitting range, the knitting dosage and areas of encryption knitting and ordinary knitting of wires are determined; a knitting process is determined, and the knitting process is combined with a matrix printing process to be jointly designed to form a printing and knitting integrated process; 3D printing materials are prepared; and 3D printing of a matrix and knitting of the wires are performedto obtain the composite beam or a composite beam external mold. A beam member prepared by the construction method is the composite beam, the tensile resistance, shear resistance, abrasion resistance and crack resistance properties of a 3D printing member are effectively improved, the fracture toughness and impact resistance properties of the member are greatly enhanced, the fatigue performance anddurability of the beam member are improved, the space spanning capability is improved, construction is convenient, and quick application is achieved.

Description

technical field [0001] The invention relates to the technical field of structural design and construction, in particular to a construction method of a composite beam integrated with 3D printing and braiding and the composite beam. Background technique [0002] As the basic component of the building structure to realize space spanning, the beam component supports the structural self-weight and service load in the upper frame. It is the most important part of the upper frame. Its design and construction are an important part of structural analysis. Safety plays a vital role. [0003] In the existing technology, the space-variable 3D printing advantages are combined with traditional steel reinforcement materials, and the outer shell or main bracket is printed by using the shaping ability of the 3D printing process, and then the traditional steel skeleton manufacturing mode is used for ordinary concrete construction. [0004] The Chinese patent document with the publication num...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B28B15/00B33Y10/00E04C3/20
CPCB28B1/001B28B15/00B33Y10/00E04C3/20
Inventor 孙晓燕王海龙陈杰汪群张治成邹道勤
Owner ZHEJIANG UNIV
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