Main Article Content
TRADITIONAL PROBABILITY-BASED STRUCTURAL RELIABILITY ANALYSIS METHOD CAN ONLY CONSIDER RANDOM UNCERTAINTIES DESCRIBED BY RANDOM DISTRIBUTION FUNCTIONS, WHICH REQUIRED SUFFICIENT EXPERIMENTAL SAMPLES. ON COMPARISON, INTERVAL UNCERTAINTIES CAN BE MORE APPROPRIATE WHEN LACKING INFORMATION. IN REALISTIC SITUATIONS, SEVERAL STRUCTURAL RELIABILITY MODELS CONSIDERING MIXED PROBABILISTIC AND INTERVAL VARIABLES ARE PROPOSED. BESIDES CHOOSING RELIABILITY MODEL ACCORDING TO THE INFORMATION AVAILABLE OF THE UNCERTAINTIES, THIS PAPER PRESENTS A PERSPECTIVE IN STRUCTURAL DESIGN THAT FOR A SPECIFIC DESIGN, THE CONTROLLABLE STRUCTURAL UNCERTAIN PARAMETERS SHOULD BE BETTER DESCRIBED AS INTERVAL VARIABLES WHILE OTHER UNCONTROLLABLE UNCERTAIN PARAMETERS SUCH AS EXTERNAL LOADS DESCRIBED AS RANDOM VARIABLES IF SUFFICIENT INFORMATION IS AVAILABLE. THE CORRESPONDING RELIABILITY ANALYSIS MODEL IS PROPOSED. FURTHER, FOR SIMPLE TRUSS STRUCTURES, THIS PAPER DEMONSTRATES THAT THE EXTREME HYBRID RELIABILITY INDEX CAN BE ATTAINED WHEN THE INTERVAL VARIABLES REACH THEIR UPPER OR LOWER BOUNDS. TO SOLVE THE HYBRID RELIABILITY INDEX, A SEQUENTIAL SINGLE-LOOP STRATEGY COMBINED WITH AN INTERMEDIATE-VARIABLE BASED RESPONSE SURFACE AND THE METHOD OF MOVING ASYMPTOTES OPTIMIZATION SOLVER IS PROPOSED. FINALLY, NUMERICAL EXAMPLES ARE GIVEN TO DEMONSTRATE THE APPLICABILITY OF THE PROPOSED METHOD AND CONCLUDING REMARKS ARE MADE.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY] that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).