Concrete Anchor With Shear Cone Shoulders
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Solution Overview
Problem
Existing anchors embedded in concrete structures face challenges in effectively transferring and distributing loads due to limitations in design, leading to potential failure under tensile and shear forces, especially in applications like securing walls to foundations or decks.
Innovation Solution
The development of an anchor system featuring a metallic anchor rod with a threaded lower portion embedded in concrete and a metallic body or wedge-shaped upper portion, incorporating recessed profiles and shoulders on the side surfaces to create shear cones, which enhances load distribution and resistance, allowing for stronger anchorage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional anchors are embedded in concrete structures, then they provide basic anchorage function, but they fail to effectively distribute loads and resist tensile and shear forces
Solution Approach 1:
The anchor body is segmented into multiple functional zones including shoulders at different heights, creating distinct load transfer paths. The side surface is divided into multiple shoulder regions that generate separate shear cones, distributing the load across multiple zones within the concrete structure rather than concentrating stress at a single point.
Solution Approach 2:
The invention transitions from traditional point or line contact anchorage to three-dimensional volumetric load distribution. By creating shear cones that extend radially and vertically into the concrete, the anchor utilizes the third dimension (depth/volume) to distribute loads, significantly increasing the effective anchorage zone and improving both strength and reliability.
2Ease of manufacture
If anchors use simple cylindrical or rectangular shapes, then they are easy to manufacture, but they cannot generate sufficient shear cones for effective load distribution
Solution Approach 1:
The anchor body is pre-formed with integrated shoulder features and side surface geometries that will generate shear cones during installation and loading. These geometric features are incorporated into the manufacturing process itself rather than requiring post-installation modification, maintaining ease of manufacture while achieving the desired load distribution through carefully designed casting or forming operations.
Data Source
AI summary
An anchor for supporting a load includes an anchor rod having a first threaded end portion for being embedded in a concrete structure and a second end portion for attachment to a load; a metallic wedge-shaped body attached to the first threaded end portion; and the body includes a circular cross-section, a circular top surface and a circular bottom surface joined by a side surface.