Bridge Upper Structure Shear Key Integration
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Solution Overview
Problem
Conventional bridge upper structures require bridge bearings for continuous girder arrangement, leading to mechanical inefficiency and excessive exposure of coping, compromising both structural efficiency and aesthetic appeal.
Innovation Solution
The proposed upper structure features a coping and girders with inclined surfaces, incorporating shear keys and slots for direct engagement, eliminating the need for bridge bearings and allowing integrated behavior, thereby enhancing structural efficiency and installation ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If bridge bearings are used to arrange girders continuously, then girder continuity is achieved, but device complexity and cost increase
Solution Approach 1:
The patent removes bridge bearings from the system entirely, replacing them with a direct integration mechanism where the coping structure itself provides the support and connection function for continuous girders, eliminating the need for separate bearing components
Solution Approach 2:
The coping and girders are merged into an integrated structure where the coping directly supports and connects the girders without intermediate bearings, creating a unified load-bearing system that achieves continuity while reducing component complexity
2Adaptability or versatility
If coping and girders are configured to behave individually, then structural flexibility is maintained, but mechanical efficiency decreases
Solution Approach 1:
The coping and girders are merged into an integrated structural system where they behave as a unified unit, sharing loads and deformations together, which enhances mechanical efficiency while maintaining the ability to adapt to different loading conditions through the integrated design
3Reliability
If coping is excessively exposed to the outside, then structural function is maintained, but aesthetic appearance deteriorates
Solution Approach 1:
The coping and girders are merged into a streamlined integrated structure where the coping does not need to be excessively exposed, as the integrated design provides both structural functionality and improved aesthetic appearance by reducing unnecessary exposure
Data Source
AI summary
An upper structure for a bridge includes a coping placed on the top end of a pier, and a girder held by the coping, wherein a side surface of the coping and an end surface of the girder are configured as inclined surfaces (or vertical surfaces), wherein a shear key protrudes on one of the inclined surfaces (or vertical surfaces), and a shear key slot is formed in another one of the inclined surfaces (or vertical surfaces) so as to be engaged with the shear key. The present disclosure can reduce the construction cost, can realize improved structural efficiency of the bridge upper structure, can realize an easy installation of the girders, can easily combine the girders with the coping without plastering or fixing with mortar by site work, and can efficiently resist to a shear stress that may be generated in the bridge.