A Method for Determining the Bearing Capacity of Steel Tube Concrete Arch Frame

A technology of concrete filled steel tube and determination method, which is applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problem that the bearing capacity cannot be effectively determined, and achieves a scientific and reasonable determination process, controllable calculation errors, and reliable calculation results. Effect

Active Publication Date: 2017-06-16
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] The problem addressed by the present invention is that the core component in the current steel tube concrete arch support technology - the bearing capacity of the steel tube concrete arch cannot be effectively determined, and a method for determining the bearing capacity of the steel tube concrete arch is provided

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  • A Method for Determining the Bearing Capacity of Steel Tube Concrete Arch Frame
  • A Method for Determining the Bearing Capacity of Steel Tube Concrete Arch Frame
  • A Method for Determining the Bearing Capacity of Steel Tube Concrete Arch Frame

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specific Embodiment approach

[0044] A preferred embodiment of the present invention is:

[0045] 1. Assign initial value

[0046] When the load on the arch frame is unknown, the initial load q 0 It refers to the load applied to the arch during the first step of calculation; the load step Δq refers to the increment of the load applied to the arch during the next step of calculation compared with the previous step of calculation, and the load step The smaller Δq is, the higher the calculation accuracy is; the number of control interfaces t refers to the number of sections taken from the arch, and the calculation result of the internal force of the section is the basic data for judging whether the arch has reached the bearing capacity. The larger the value, the higher the calculation accuracy.

[0047] Apply an initial load q slightly smaller than the yield load to the arch by predicting 0 =90kN / m, Δq=0.1kN / m, t=41. The meaning of the above assignment is that the arch is applied with a uniform load, and ...

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Abstract

The invention discloses a method for determining the bearing capacity of a steel pipe concrete arch, which comprises the following steps: step (1): establishing a mechanical calculation model of a steel pipe concrete arch, the section taken from the arch is a control section S, and its quantity is preset The number of is t; Step (2): Calculate the i-th control section S i , where 1≤i≤t; Step (3): Judging the control section S of the arch according to the positive eccentricity criterion and the negative eccentricity criterion i Whether reach ultimate bearing capacity; step (4): solve the bearing capacity of steel tube concrete arch frame, the bearing capacity of described steel tube concrete arch frame is the control section S that appears for the first time on the arch frame i The ultimate bearing capacity reached; if the control section S i When the ultimate bearing capacity is reached, the bearing capacity Q of the CFST arch y For: Q y =∫q y ds,q y is the control section S i on the load.

Description

technical field [0001] The invention relates to a calculation method for the bearing capacity of engineering support structures such as mine roadways, tunnels, hydropower chambers, and subways, and in particular to a method for determining the bearing capacity of steel pipe concrete arch frames. Background technique [0002] With the rapid development of my country's infrastructure construction, more and more projects such as mine chambers, roadways, water conservancy and hydropower, railways, highways, subway tunnels and other projects are facing harsh geological conditions. Taking coal mine roadway engineering as an example, as of the second half of 2013, there have been 47 mines with a mining depth of more than 1000m in my country. After coal mining enters the deep part, the support problem is prominent. The existing anchor net spray support and commonly used high-strength U-shaped steel The support is difficult to meet the safety and use requirements of the roadway. At p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 李为腾梅玉春王书庆张浩杰李建伟
Owner SHANDONG UNIV OF SCI & TECH
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