In this presentation the characteristics of parameters such as loading conditions, geometrical and material properties as used for structural analysis and design are discussed. Stochastic models are shown to be most suitable for their rational representation. In particular the aspect of uncertainties and their consequences are treated. The suggested approach which combines the FE method with Mo...

The development of a general framework for robust reliability-based design of base-isolated structural systems under uncertain conditions is presented. The uncertainties about the structural parameters as well as the variability of future excitations are characterized in a probabilistic manner. Isolation elements composed of nonlinear lead rubber bearings are used to model the isolation system....

The concept of robust reliability is de®ned to take into account uncertainties from structural modeling in addition to the uncertain excitation that a structure will experience during its lifetime. A Bayesian probabilistic methodology for system identi®cation is integrated with probabilistic structural analysis tools for the purpose of updating the assessment of the robust reliability based on ...

i n troduction: users’ behavioral intention to use the picture archiving and communication system (pacs) is important in the systems’ success and is an indicator of the users’ satisfaction with commitment and dependence on information systems. the present study aimed to evaluate the users’ continuous intention to use pacs based on the expectation confirmation model in educational hospitals of s...

the aim ofstudy was to explain the role of resilience on subjective well-being and their relationship with self-efficacy at nursing care assistants of the kahrizak elderly home. the research method was descriptive-correlative and analysis method of structural equation modeling. statistical population consisted of all care assistants of kahrizak nursing home has formed to number of 175 of which ...

due to the probabilistic nature and uncertainties of structural parameters, reliability-based optimization will enable engineers to account for the safety of the structures and allow for its decision making applicability. thus, reliability-based design will substitute deterministic rules of codes of practice. space structures are of those types that have an exceedingly high range of applicabili...

Due to the inherent uncertainties or variabilities in loads, materials and manufacturing quality, variabilities are unavoidable in structural responses. To ensure the reliability of a structure, these uncertainties or variabilities must be considered during structural design. Through a simple cantilever box beam example, the concepts and practices of three design methodologies: deterministic de...

This paper presents an approach for the reliability–based design optimization of highly safe structural systems where a tail–model is used for computing the reliability constraint during design optimization. It is generally accepted that using central models (e.g., moment– based method or stochastic response surfaces) for estimating large percentiles such as those required in reliability constr...

Structural failures in recent earthquakes and hurricanes have exposed the weakness of current design procedures and shown the need for new concepts and methodologies for building performance evaluation and design. A central issue is proper consideration and treatment of the large uncertainty in the loadings and the complex building behavior in the nonlinear range in the evaluation and design pr...