Method and device for determining temporary tension force of segmental assembly beam by means of bonding

By calculating the distance between the tension point and the centroid line on the top and bottom plates of the segmental beam assembled by adhesive bonding, the tension at the top and bottom plates is determined, which solves the problem of inconsistent adhesive joint width and bridge alignment deviation caused by uneven tension at the top and bottom plates, and achieves the effect of consistent adhesive joint width and accurate bridge alignment.

CN117168670BActive Publication Date: 2026-06-26CHINA RAILWAY 19 BUREAU GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY 19 BUREAU GRP CO LTD
Filing Date
2023-07-20
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In the existing technology, when the top slab and bottom slab are tensioned with the same tension force, it leads to problems such as inconsistent joint widths and deviations in bridge alignment.

Method used

By obtaining the total tension of the temporary prestressed tendons in the glued segmental assembled beam, the distance between the tension points on the top and bottom slabs and the centroid of the joint surface, the tension at the top and bottom slabs is calculated, and the temporary tension of a single fine-rolled threaded steel bar is determined based on these distances to ensure uniform stress distribution at all points on the joint surface.

Benefits of technology

This achieves consistent joint width during tensioning, resulting in more precise bridge alignment and avoiding issues such as inconsistent joint width and alignment deviation.

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    Figure CN117168670B_ABST
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Abstract

The application provides a method and device for determining temporary tension of a segmental assembly beam by a bonding method, and relates to the technical field of bridge construction. The method comprises the following steps: obtaining the total tension of the temporary prestressed tendon of the segmental assembly beam by the bonding method, the first distance between the tension point on the top plate and the centroid line, and the second distance between the tension point on the bottom plate and the centroid line; determining the tension on the top plate as the ratio between the total tension and the first value, and determining the temporary tension of the single precision rolled threaded steel bar on the top plate based on the tension on the top plate; wherein the first value is the sum of the ratio between the first distance and the second distance and 1; determining the tension on the bottom plate as the product between the tension on the top plate and the second value, and determining the temporary tension of the single precision rolled threaded steel bar on the bottom plate based on the tension on the bottom plate; wherein the second value is the ratio between the first distance and the second distance. The application can ensure the uniformity of the bonding seam width during tensioning, and the bridge alignment is more accurate.
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