Time dependent variation of carrying capacity of prestressed precast beam

[摘要] The article deals with the evaluation of the precast concrete element time dependent carrying capacity. The variation of the resistance is inherited property of laboratory as well as in-situ members. Thus the specification of highest, yet possible, laboratory sample resistance is important with respect to evaluation of laboratory experiments based on the test machine loading capabilities. The ultimate capacity is evaluated through the bending moment resistance of a simply supported prestressed concrete beam. The probabilistic assessment is applied. Scatter of random variables of compressive strength of concrete and effective height of the cross section is considered. Monte Carlo simulation technique is used to investigate the performance of the cross section of the beam with changes of tendons' positions and compressive strength of concrete.

[发布机构] Faculty of Civil Engineering, Saigon Technology University, HCMC, 180 Cao Lo Str., Dist. 8 Ward 4, 700000, Viet Nam^1;VSB - Technical University of Ostrava, Faculty of Civil Engineering, L. Podeste 1875, Ostrava-Poruba; 708 33, Czech Republic^2

[效力级别] 运输工程

[关键词] Bending moment resistance;Compressive strength of concrete;Laboratory experiments;Monte carlo simulation technique;Prestressed concrete beams;Probabilistic assessments;Sample resistance;Time dependent variations