Load Testing of Existing Concrete Structures (Part 2)-Load Testing of Concrete Structures An Engineer’s Perspective (PDF)

Load Testing of Concrete Structures An Engineer’s Perspective (PDF)

Pdf Summary

The document titled "Load Testing of Concrete Structures: An Engineer’s Perspective" by Filippo Masetti, P.E., and Nestore Galati, P.E., presents a technical case study on load testing of concrete structures, specifically focusing on lightweight roof planks and the effects of temperature on load testing. This study was part of a proposed renovation project for Draper Hall.<br /><br />The case study involves conducting a load test on the existing roof construction, selecting test areas, and applying the test load per ACI 318 Chapter 20 guidelines. According to these guidelines, the test load must include existing dead loads and be greater than the maximum determined by specific load combinations. The load is applied uniformly to ensure an even distribution across the structure.<br /><br />Instrumentation, such as Linear Variable Differential Transformers (LVDTs), was employed to measure deflection and other properties during the test, with specific placement mentioned (e.g., LVDT 1-3 and LVDT 1-6).<br /><br />The study examines not only load effects but also how temperature variations impact deflection. Data were collected on temperature at various points on the planks, and temperature differential effects were analyzed. Results showed a linear relationship between temperature differential and deflection, as evidenced by mathematical equations and correlation coefficients. Furthermore, graphs depicting deflection versus temperature and load versus deflection were provided.<br /><br />The temperature effects were significant in the study, highlighting the necessity of considering environmental factors during load testing. The case study concludes with a summary of the outcomes and invites further questions from readers, providing contact information for Filippo Masetti for inquiries.

Keywords

load testing

concrete structures

lightweight roof planks

temperature effects

Draper Hall renovation

ACI 318 guidelines

LVDTs

deflection measurement

temperature differential

structural engineering