INTRODUCTION During the structural design process, an engineer has to consider problems of the safety, reliability and durability of a single structural element as well as the entire structure from the point of view of its planned life cycle. The reliability of structural elements and systems is analyzed using two limit states – the ultimate limit state and the serviceability limit state. The loading effects are compared here with the effects of the resistance of the structure with respect to the environmental effects. Randomness in the loading and the environmental effects, the variability of the material and geometric characteristics of structures and many other “uncertainties” affecting errors in the computing model lead to a situation where the actual behavior of a structure is different from the modeled one. Recent advances and the general accessibility of information technologies and computing techniques give rise to assumptions concerning the wider use of the probabilistic assessment of the reliability of structures through the use of simulation methods (Marek, P., Brozzetti, J., Guštar, M., 2001; Janas, P., Krejsa, M., 2002; Soares, R. C., et al., 2002; Teplý, B., Novák, D., 2004; Králik, J., Králik, J., 2006; Králik, J., Kosa, T., 2006; Králik, J., Varga, T., 2006). Much attention should be paid to using the probabilistic approach in an analysis of the reliability of structures (Ellingwood, B., et al., 1980; Rosovsky, D. V., 1995; Sadovský, Z., 2002). Most problems concerning the reliability of building structures are defined today as a comparison of two stochastic values, loading effects E and the resistance R, depending on the variable material and geometric characteristics of the structural element. The variability of those parameters is characterized by the corresponding functions of the probability density f R (r) and f E (e). In the case of a deterministic approach to a design, the deterministic (nominal) attributes of those parameters R d and E d are compared. J. KRÁLIK, J. KRÁLIK, Jr. PROBABILITY AND SENSITIVITY ANALYSIS OF SOIL-STRUCTURE INTERACTION OF HIGH-RISE BUILDINGS KEY WORDS • Probability, • sensitivity, • soil-structure interaction, • high-rise building, • finite element method, • Monte Carlo, • ANSYS ABSTRACT This paper presents experience gained from a probabilistic and sensitivity analysis of soil-structure interaction in the case of high-rise buildings with the Response Surface Method using the ANSYS program. The advantages and disadvantages of the methods Monte Carlo, Importance Sampling, Latin Hypercube Sampling and Response Surface Method are discussed. The possibilities of utilizing the RSM method to analyze the extensive and complicated tasks in Finite Element Method are presented in the case of the CBC high-rise building in Bratislava. This analysis was made based on the design of the optimal system of the structural elements considering the soil-structure interaction. The soil conditions were complicated by aggressive groundwater and problematic ground layers. In accordance with these results, the modification of the structural systems was realized. These analyses were made using the ANSYS program. Doc. Ing. Juraj Králik, PhD., Head of Department of Structural Mechanics Research field: Statics and Dynamics, Safety and Reliability of Structures Slovak University of Technology in Bratislava Faculty of Civil Engineering, Radlinského 11, 813 68, Bratislava, e-mail: [email protected] Ing. Juraj Králik Doctoral student of Department of Structural Mechanics Research field: Soil –Structure Interaction Slovak University of Technology in Bratislava, Faculty of Civil Engineering, Radlinského 11, 813 68, Bratislava, e-mail: [email protected] 2006 SLOVAK UNIVERSITY OF TECHNOLOGY 2006/3 – 4 PAGES 23 – 32 RECEIVED 18. 9. 2006 ACCEPTED 27. 11. 2006 Kralik.indd 23 7. 5. 2007 13:34:13
PROBABILITY AND SENSITIVITY ANALYSIS OF SOIL-STRUCTURE INTERACTION OF HIGH-RISE BUILDINGS
Jun 15, 2023
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