Probabilistic assessment of load-bearing capacity of deep beams designed by strut-and-tie method

Abstract

This paper presents probabilistic assessment of load-bearing capacity and reliability for different STM of deep beams. Six deep beams having different reinforcement arrangement obtained on the basis of STM but the same overall geometry and loading pattern were analysed. The used strut-and-tie models for D-regions of analysed elements have been verified and optimised by different researchers. In order to assess load-bearing capacity of these elements probabilistically, stochastic modelling was performed. In the presented probabilistic analysis of deep beams designed, the ATENA software, the SARA software and the CAST (computer-aided strut-and-tie) design tool were used. The reliability analysis shown that STM optimization should be a multi-criteria issue so that the obtained models were characterized by optimal stiffness with the assumed volume or weight and maximum reliability.

Shear Capacity of Reinforced Concrete Beams under Monotonic and Cyclic Loads: Experiments and Computational Models

“…Other, less known shear design approaches found in the literature include the shear zone model [ 35 , 36 ], dimensioning methods such as semi-probabilistic (e.g., Monte Carlo method) [ 37 , 38 ], finite element [ 39 , 40 , 41 ] or neural networks methods [ 42 , 43 ].…”

“…The resulting difficulties in describing the behavior of the support zones, most often referred to as shear, force the simplifications that must be verified experimentally. As the computational models proposed [ 2 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ] fail to fully describe the real shear strength of reinforced concrete elements, the search for uniform models to formulate the shear design provisions is being continued. The models for incorporation in standard requirements are selected from among those that ensure the most reliable results for the adequate level of structural reliability.…”