Abstract: The principle of increasing
structural loading ability by the using of elastic-plastic
controlling design, which can make steel reach a higher yield
strength through controlling undue strains produced in loaded
box steel structures and no damager to the static mechanical
properties of the used materials, is dealt with under the
guarantee of strength, rigidity, and stability. A new idea of
elastic-plastic controlling design, which is mainly based on the
elastic-plastic theory and experimental results and is different
from the current design which is mainly based handbooks and
designer's experience, is established. That is: the loading time
and its effect on loaded structures are considered, and the
potential strength in used materials is fully utilized through
the controlling of structural strains in design. By the using of
this design method, the weight and cost of box structures will
be reduced in large amount.
Key words:
Box steel structure Elastic-plastic
design Controlling design
* This project is supported by Chinese Postdoctoral Science Foundation.
Manuscript received on July 15, 1995; revised manuscript January 10, 1996
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