Formulation of the membership function and determination of the input of fuzzy loads in the structural fuzzy analyzing problem
Nguyen Van Pho
Abstract
The fuzzy analyzing process consists of different steps. In this paper, the
author considers only the method for formulation of the membership function of fuzzy
loads acting on the structure. Based on the membership function of fuzzy loads, the
combinations of deterministic of the regression analyzing process will be determined.
The membership function of fuzzy loads is selected by the triangular membership function.
It is in conformity with the concept on selection of loads in the design standards.
The combination of inputs for the analyzing process will be determined, based on the
number of present times of the value of input parameters (including the deterministic
parameters, fuzzy parameters and the random ones) in the schema of analysis.
The number of present times of input parameters is either proportional to value of the
corresponding membership function or to the value of the probabilistic density function.
A method for determining the appropriate combination of deterministic inputs so that
each input parameter will present only one time in each combination is proposed.
To illustrate the proposed method, an example on the determination of input combinations
of tornado’s velocity in Vietnam is presented.