Fastener-style steel pipe template support system design method

A formwork support and design method technology, applied in the direction of design optimization/simulation, calculation, special data processing applications, etc., can solve problems such as inconsistent conclusions, calculation results that cannot reflect the actual situation, limited research on structural measures, etc., to achieve improvement The effect of stable bearing capacity

Inactive Publication Date: 2018-08-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

In terms of improving the bearing capacity, the reasonable structural measures of the fastener-type steel pipe support system are also one of the conditions that cannot be ignored. Most of the scholars based on their own experiments and numerical simulations, regression obtained the structural measures and the stable bearing capacity of the formwork support system. However, the completed experimental research is only limited to specific erection forms, and the research on structural measures through tests is limited after all. The structural factors affecting the ultimate bearing capacity of fastener-type support frames have not been fully considered, and the research on structural measures is limited to The impact analysis of a single factor has not been reported for the coupling analysis of multiple parameters
In addition, many assumptions introduced in the calculation model of the fastener-type steel pipe support system make the calculation results unable to reflect the actual situation, and no consistent conclusions have been obtained, so further research is needed

Method used

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  • Fastener-style steel pipe template support system design method
  • Fastener-style steel pipe template support system design method
  • Fastener-style steel pipe template support system design method

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Experimental program
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Embodiment

[0090] Through the ABAQUS finite element software, the mechanical performance of the fastener-type steel pipe formwork support system is analyzed as a whole. According to the provisions of relevant erection parameters in Safety Code (JGJ 162-2008), the analysis model of typical support system is selected as follows: Figure 4 As shown, the distance between vertical and horizontal poles l a = l b = 1.2m, the step distance of the horizontal bar h = 1.5m, the length of the vertical bar beyond the top horizontal bar is a = 0.2m, the height of the sweeping bar is d = 0.2m, and the rotational stiffness of the right-angle fastener is taken as R k =30kN·m / rad, the vertical scissor braces are arranged around the supporting system, and are set in two directions.

[0091] 1. Influence of fastener tightening torque T

[0092] Figure 5 The influence curve of fastener tightening torque on the stable bearing capacity of the support system. It can also be seen from the figure that when ...

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Abstract

The invention provides a fastener-style steel pipe template support system design method. Through ABAQUS finite element software, a finite element model of a fastener-style steel pipe template supportsystem is built; a law of influence of multiple separate erection parameters and combination parameters on bearing capacity of the support system is analyzed and researched more comprehensively; theerection parameters of the fastener-style steel pipe template support system are subjected to reasonable value-taking; the strength advantage of the support system is fully exerted; stable bearing capacity of a whole bracket is improved; and a great reference basis is provided for safety control of the support system.

Description

technical field [0001] The invention relates to the technical field of fastener-type steel pipe formwork, in particular to a design method for a fastener-type steel pipe formwork support system. Background technique [0002] Since the United States successfully developed and put into use portal supports in the 1950s, a large number of formwork support systems have emerged and been widely used. The use of portal supports in Europe and the United States is the largest, accounting for about half. In my country, fastener-type steel pipe support frames are used in the largest amount and are most widely used, accounting for about 70% of the total use. Scholars at home and abroad have conducted research on its theoretical calculation model, node connection performance, and construction measures. [0003] Theoretical calculation models of the fastener-type steel pipe support frame generally include the following types: single-rod hinged model, multi-layer hinged bent frame calculat...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 吴瑾王蒙涛张献蒙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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