TAILIEUCHUNG - On the reliability problems of structures subjected to dynamical loads

In this paper, the authors, originating from a general definition on the reliability of a system by V. V. Bolotin, assess the reliability of oscillating structure, by determining the upper and the lower bounds of the reliability. | Vietnam Journal of Mechanics, VAST, Vol. 29, No. 3 (2007), pp. 427 - 439 Special Issue Dedicated to the Memory of Prof. Nguyen Van Dao ON THE RELIABILITY PROBLEMS OF STRUCTURES SUBJECTED TO DYNAMICAL LOADS NGUYEN VAN PHO , LE NGOC THACH, CHU THANH BINI! Hanoi University of Civil Engineering Abstract. Mechanically, the assessment of t he structure's safety relates to three aspects: strenght, stability and oscillation. In the oscillation problems of structures, Lhc safety conditions are conditions of fr equency, a mplitude, resonance, maximum displaccmenl, etc In case t hat the structure itself contains random parameters and subjects to external loads that are also the random parameters (or random processes), the assessment of the structure's safety according to the deterministic inequalities of structural mechanics will be insignificant. Therefore, this should be assessed accordii-ig Lo the probabilistic point of view, namely, according to the reliability. The determination of reliability of the oscillation problems of structures encounters many difficulties because the outputs of the structural analysis problem arc the random processes (or t he random field). Meanwhile, up to now , the determii;iation of a probabi lily according to which a random process will belong to a given dom ain by mathematical method has not been sufficiently studied yet . In this paper, the a uthors, originating from a general definition on the reliability of a system by V. V. Bolotin, assess the reliability of osci llating structure, by determining the upper and the lower bounds of the reliability. The upper and the lower bounds of t he reliabi li ty are recommended to be determined by determining t he probability depending on only an inequality instead of delermining the it depending on a system of inequalities. Thus, the determination is very favourable. 1. INTRODUCTION Reliability is the most important parameter for assessment of the structure's safety. Mechanically, the .

• Cơ khí - Chế tạo máy
• Vietnam Journal of Mechanics
• Reliability problems of structures subjected to dynamical loads
• Structures subjected to dynamical loads
• Determining the upper
• The lower bounds of the reliability
• Dang Dinh Ang
• Nonlinear analysis and mechanics
• Dynamic problems involving stationary cracks
• The Wiener Hopt technique
• Dual integral equations
• Dual integrals in non linear fracture mechanics
• Non linear fracture mechanics
• Energy release rate
• Discuss the obtained
• The alpha finite element method (αFEM)
• Solid mechanics using triangular and tetrahedral elements
• Suitable computational cost
• NS FEM makes
• The upper bound property
• Non linear constitutive problems in solid mechanics
• Non linear constitutive problems
• Languages Gibian and special operators
• The application FEM
• Betts miller janjic convective parameterization scheme
• H14 31 model to forecast heavy rainfall in Vietnam
• Betts Miller Janjic
• Three rain seasons
• Manufacturing dry mixed cement mortar
• High compressive strength
• High flexural strength
• Low shrinkage and high watertightness for restoration
• Damaged hydraulic structures in Vietnam
• Standard gradient models and crack simulation
• Standard gradient models
• The propagation of cracks
• Damage mechanics and crack simulation
• The interaction between two parametric excitations
• The second and third degrees
• The asymptotic method of nonlinear mechanics
• Dynamic system governed
• Comparison of two hydrological model simulations
• Nam and Xinanjiang for Nong Son catchment
• The Central Vietnam
• The runoff components
• 3 D numerical simulation
• The tidal circulation
• The gulf of Tonkin
• The kinetic energy distribution
• Duality in the analysis of responses to nonlinear systems
• The analysis of responses
• The original nonlinear systems
• The study of nonlinear mechanics
• Aerodynamics of a wing in surface effect ship
• Theory and experiment
• Wing in surface effect ship
• The aerodynamic characteristics
• The Institute of Mechanics
• The error estimate
• The convergence rate for h
• p refinement
• The finite element analysis
• Three dimensional elastostatic mechanics problems
• Some initial experimental results
• Free water layer formation in horizontal pipes
• Water layer formation
• Hanoi Institute of Mechanics
• Bending vibration of beam elements under moving loads
• Considering vehicle braking forces
• Fluctuations of structures
• Beam elements according
• Continuous element for vibration analysis
• Thick shells of revolution
• Continous Element Method
• Finite element solutions
• Natural frequencies and harmonic responses
• Cast3m implementation of the extended finite element method
• The extended finite element method for cohesive crack
• Quasi brittle materia
• The proposed implementation
• The displacement discontinuities
• Buckling analysis of simply supported composite laminates subjected
• In plane compression load
• A novel mesh ffree method
• Alternative numerical technique
• Mesh free method
• A three story building
• Hedge algebras based fuzzy controller
• The structural system
• The El Centro earthquake
• Three story building against earthquake
• Laminar separation phenomenon combining with numerical calculations
• The turbulent separation
• The laminar separation
• Experimental study on mechanical properties
• Three phase polymer composite reinforced
• Glass fibers and titanium oxide particles
• Polymer composite reinforced
• Three phase composite
• Dynamic characteristics of elastically supported beam subjected
• A compressive axial force and a moving load
• The implicit Newmark method
• The Galerkin finite element method
• The axial force
• Eccentrically stiffened functionally graded plates and shallow shells
• Von Karman Donnell sense
• The formulation of governing equations
• The classical shell theory
• Mathematical modelling and control of the evolution
• Dynamic systems interacting with medium
• Mathematical modeling evolutional systems interacting
• Two conjugate mechanical subsystems
• Evaluating structural safety based on fuzzy set theory
• Evaluating structural safety
• The fuzzy reliability
• Simple beam structure