DYNAMIC TESTS OF MODEL STEEL STRUCTURES.
Final rept., 18 Mar 64-30 Nov 65,
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CIVIL ENGINEERING
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The objective of the research project was the development of modelling techniques for steel structures and an investigation of the effect of strain rate on the resistance function of structural elements. The work proceeded in four phases a dynamic loading machine was developed, dynamic material properties were determined in a series of tensile tests, 16 static and dynamic tests were performed on simply supported beams loaded at the third points, and a series of 16 static and dynamic tests were performed on fixed ended portal frames subjected to a lateral load at the level of the girder. The dynamic loading machine is capable of rise times of 3 milliseconds or more and maximum loads of 2000 pounds. It can also be used as a static loading machine. Generally, it is concluded that model studies of steel structures provide an excellent experimental tool. Very sensitive tests for the investigation of strain rate effects have been developed. The necessary apparatus and techniques have been refined and initial difficulties eliminated so that a large number of additional tests on models with a variety of geometric configurations and material properties could be performed rapidly and reliably. These tests might significantly extend our understanding of the dynamic behavior of steel structures. Author
- Structural Engineering and Building Technology