Reverse analysis method for circular steel tube construction error

Abstract

The embodiment of the invention discloses a reverse analysis method for a circular steel tube construction error. The method comprises the following steps that: taking two points on the peripheral visual positions, which are near two ends, of each circular steel tube for measurement, recording the practical coordinate values of the two points, and feeding back to design; establishing a plane by taking each point as an original point and taking a direction parallel with the center line of the circular steel tube as a Z direction, and establishing a circle of which the radius is equal to the radius of the circular steel tube on the plane; projecting two circles on the same end to the plane established by the point which is nearer to an end point so as to ensure that two points of intersection are in the presence on two projection circles, and taking the point which is nearest to the original center line; connecting the points of intersection of two ends to obtain a line segment, and carrying out extension to obtain a center line position which simulates the practical circular steel tube, and establishing the circuit steel tube by the simulated center line; and comparing a theoreticalcircular steel tube position with a practical circular steel tube position, and analyzing an error. By use of the reverse analysis method for the circular steel tube construction error, only four random sites are required for simulating one steel joist, the problem of a measurement blind area is solved, the workload of measurement personnel is lightened, and working efficiency is improved.

Description

technical field [0001] The invention relates to an installation error analysis method of a curtain wall round steel pipe, in particular to a reverse analysis method for the construction error of a round steel pipe. Background technique [0002] In the process of curtain wall construction, especially for curtain walls with various curved shapes, after the optimization of the skin of the curtain wall and the modeling of the scheme are completed in the early stage, it enters the most complicated construction stage of the steel structure of the curtain wall. The radial direction and the circumferential direction of are determined, and they are all round steel pipes. The radial pipe cuts the intersecting line at the position where it intersects with the circumferential pipe. During the construction process, due to the inability to accurately find the positioning point, the construction error cannot be estimated. Analyzing the positioning method of the steel structure constructio...

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Problems solved by technology

[0004] The technical problem to be solved by the embodiments of the present invention is that there are many blind spots in the total station during on-site steel keel construction. If the measurement point and theoretical coordinate value are provided by design, then the real coordinate of the point is checked by the conventional method. , the measurement point in the corresponding model cannot be accurately found on site, and it is likely to be blocked. A reverse analysis method for the construction error of the circular steel pipe is proposed

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