WZP Wedge Anchor Bolt with carbon steel and Stainless Steel

What performance characteristics should be considered in vehicle-mounted anchors for applications such as equipment foundations, bridges, and railroads?

1. Fatigue Resistance
Definition: This refers to the ability to resist fatigue fracture under long-term alternating loads (forces with varying direction or magnitude).

Advantages of Vehicle-Mounted Anchors: Their mechanical locking mechanism, through the expansion sleeve, creates a tight interlock with the concrete hole wall, distributing force transmission and minimizing stress concentration, resulting in excellent fatigue resistance.

Comparison: Their fatigue resistance is generally superior to bonded anchors, which rely primarily on friction.

2. Loosening Resistance
Root Cause: Vibration can cause traditional anchors that expand by friction to loosen because vibration reduces the pressure between the expansion sleeve and the concrete, resulting in a loss of preload.

Design of Vehicle-Mounted Anchors: Their mechanical locking mechanism acts more like a “wedge.” When subjected to vibration, dynamic loads tighten the locking mechanism, resulting in excellent loosening resistance.

Safety assurance: This feature ensures that the connection system will not fail in a long-term vibration environment, avoiding catastrophic accidents.

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