DYNAMIC TIME HISTORY ANALYSIS OF BLAST RESISTANT DOOR USING BLAST LOAD MODELED AS IMPACT LOAD
Abstract: A blast resistant
single door was designed to withstand a 0.91 bar blast pressure and 44 ms blast
duration. The analysis was done using Dynamic Time History Analysis using Blast
Load modeled as Impact Load for given duration. The material properties used have
been modified to accommodate dynamic effects. The analysis was done using
dynamic finite element method (fem) for time of the blast duration, and the
maximum/minimum internal forces and displacement were taken from the time
history output, in order to know the behavior under blast load and estimate the
safety margin of the door. Results obtained from this research indicated that
the maximum z-displacement is 1.709 mm, while in the term of serviceability,
the permitted is 25 mm. The maximum reaction force is 73,960 N, while the
maximum anchor capacity is 82,069 N. On blast condition, the maximum frame
stress is 71.71 MPa, the maximum hinge shear stress is 45.28 MPa. While on
rebound condition, the maximum frame stress is 172.11 MPa, the maximum hinge shear
stress is 29.46 MPa. The maximum door edge rotation is 0.44 degree, which is
not exceed the permitted boundary (1.2 degree).
Author: Y. A. Pranata, N.
Madutujuh
Journal Code: jptsipilgg120054
