Load Testing of Existing Concrete Structures (Part 2)-Load Testing of a Parking Structure Due to Low Concrete Compressive Strengths (Recorded presentation)

Load Testing of a Parking Structure Due to Low Concrete Compressive Strengths (Recorded presentation)

Video Transcription

Video Summary

In the presentation, Rob Kendall and Dirk Heidbrink of Wisgeny-Elsner discussed the load testing of a parking structure that faced issues due to low concrete compressive strengths. This mid-rise office and parking structure had its P2 level slab rejected due to strength concerns. The speakers explained their methodology for assessing the issues, which included multiple core samples and Schmidt hammer testing. They noted that the low strength was isolated to specific batches of concrete, affecting certain areas. The solution involved conducting a load test in line with ACI regulations, using IBC totes for uniform loading and hydraulic jacks for concentrated loads. The tests passed without significant cracking or deflection issues, suggesting that safety wasn't a concern despite the lower concrete strengths. However, the structure's durability required attention, leading to resurfacing in identified weak spots. This approach ensured the structure's integrity while addressing its longevity.

Keywords

load testing

concrete compressive strength

Schmidt hammer testing

ACI regulations

hydraulic jacks

structure durability