Ensuring Reliability of Reinforced Concrete Structures of "Northern Installation"

[摘要] One of the directions in active management of the building structures design reliability is the correction of functional models of the criterial efficiency based on the specific conditions of their operation. With respect to the reinforced concrete structures of the "northern installation", such an approach predetermines the necessity to consider kinetics and statistical patterns of wear under systemic and cyclical impacts of low negative temperatures and humidity. Concurrently, the task of project assurance of equitability with usual structures of the "northern installation" for the duration of the expected service life is considered. In the first approximation, this task is proposed to be solved by correcting significant parameters of the concrete's constructive properties in correlation with the kinetics of exhaustion of the concrete's projected (controlled) frost resistance. This work presents the results of statistically representative generalization of the change in strength, modulus of elasticity and ultimate deformations in cryogenic and thawed states under cyclic impact of temperatures up to minus 40°C. Based on these results, the dynamic models of dependency of concrete's standardized characteristics on its frost's resistance exhaustion level have been developed.

[发布机构] Department of Building Constructions, Irkutsk National Research Technical University, Lermontov St., 83, Irkutsk; 664074, Russia^1

[学科分类] 土木及结构工程学

[关键词] Active management;Building structure;Design-reliability;Functional model;Impact of temperatures;Negative temperatures;Statistical pattern