Custom Search




(10) Determine the loadmass factor, KLM, and compute the
effective unit mass, me.
(11) Compute the natural period of vibration, TN.
(12) Determine the door response using the values of B/ru
and T/TN with Figure 67 of NAVFAC P397 to determine
the values of Xm/XE and [theta]. Compare the design
criteria of Step 1. If these requirements are not
satisfied, select another thickness and repeat Steps 2
to 13.
(13) Design supporting flexural element considering composite
action with the plate.
(14) Calculate elastic and plastic section moduli of the
combined section.
(15) Follow the design procedure for a flexural element as
described in the design examples of Section 4.
Calculation:
Given:
(1) Pressuretime loading as shown in Figure 76a.
(2) Design criteria:
Maximum ductility ratio, [mu]max = 5
Maximum end rotation, [theta]max = 2deg.,
whichever governs.
(3) Structural configuration as shown in Figure 76b.
Note:
This type of door configuration is suitable for
low pressure range applications (5 to 15 psi).
(4) Steel used:
ASTM A36
Yield strength, Fy = 36 ksi
Dynamic increase factor, c = 1.1
Hence, the dynamic yield strength:
Fdy = 1.1 x 36
= 39.6 ksi
and the dynamic yield stress in shear:
Fdv = 0.55Fdy
= 0.55 x 39.6
= 21.78 ksi
2.08281


Integrated Publishing, Inc.
6230 Stone Rd, Unit Q
Port Richey, FL 34668
Phone For Parts Inquiries: (727) 4930744 Google + 