Abstract
The paper deals with research data of reinforced concrete rectangular and I-shaped cross-section elements, operating under oblique eccentric short-term dynamic compression, tension and bending. The method of reinforced concrete elements calculation using the theory of surfaces of relative resistance regarding strength and crack resistance is suggested. It is based on the deformation model with the use of real nonlinear diagrams of concrete and reinforcement. This method makes it possible to observe strength and crack resistance of reinforced concrete elements sections in the entire range of loadings from the central tension to axial compression. Experimental investigation of symmetrically reinforced concrete elements on oblique eccentric short-term dynamic compression, tension and oblique bending was carried out. Effect of longitudinal force level on strain distribution through the depth of section, bearing capacity, the failure scheme and other parameters are estimated.
Highlights
The modern approach to engineering design requires development of design diagrams that comply with the spatial operation of bearing systems of buildings and structures
The maximum deflections occurred at the minimum longitudinal force, the increase in the level of the longitudinal force deflections decreased at the increase of the longitudinal force level
Based on the experimental results it can be concluded that the method described can be effectively used for the calculation of reinforced concrete elements under static and dynamic oblique eccentric loadings
Summary
The modern approach to engineering design requires development of design diagrams that comply with the spatial operation of bearing systems of buildings and structures. When operated as part of three-dimensional systems and with short-term dynamic loadings, the stress strain behavior of the reinforced concrete elements significantly changes that must be considered at the designing and evaluating of the bearing capacity of structures referred to several existing studies [1-10] It is characteristic for reinforced concrete columns of buildings frame and their joints. There are engineering approaches to the estimation of bearing capacity of the reinforced concrete elements under complex stress-strain states, based on the use of special curves that describe the strength of the element, both in Russian and foreign standards These curves are usually plotted according to the specific dependences and represented in the regulatory literature in the form of bearing capacity graphs of elements at the fixed volumes of reinforcement.
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