Experimental sensitivity analysis of subsoil-slab behaviour regarding degree of fibre-concrete slab reinforcement

[摘要] The paper is focused on the sensitivity analysis of behaviour of the subsoil - foundation system as regards the variant properties of fibre-concrete slab resulting into different relative stiffness of the whole cooperating system. The character of slab and its properties are very important for the character of external load transfer, but the character of subsoil cannot be neglected either because it determines the stress-strain behaviour of the all system and consequently the bearing capacity of structure. The sensitivity analysis was carried out based on experimental results, which include both the stress values in soil below the foundation structure and settlements of structure, characterized by different quantity of fibres in it. Flat dynamometers GEOKON were used for the stress measurements below the observed slab, the strains inside slab were registered by tensometers, the settlements were monitored geodetically. The paper is focused on the comparison of soil stresses below the slab for different quantity of fibres in structure. The results obtained from the experimental stand can contribute to more objective knowledge of soil - slab interaction, to the evaluation of real carrying capacity of the slab, to the calibration of corresponding numerical models, to the optimization of quantity of fibres in the slab, and finally, to higher safety and more economical design of slab.

[发布机构] VSB - Technical University of Ostrava, Faculty of Civil Engineering, Czech Republic^1;Ton Duc Thang University, Faculty of Civil Engineering, Ho Chi Minh City, Viet Nam^2

[效力级别] 运输工程

[关键词] Cooperating systems;Economical design;Fibre concrete;Foundation structures;Foundation systems;Relative stiffness;Slab reinforcement;Stress strain behaviours