Research On Ultimate Strength Of Cross-Section Of Lightweight Aggregate Reinforced Concrete L-Shaped Columns

Based on the experimental study of six L-shaped haydite concrete columns subjected to biaxially eccentric compression, this thesis reveals the failure pattern of L-shaped lightweight aggregate concrete columns under biaxial eccentric compression, researches on the behavior of ultimate strength of L-shaped members, examines the hypothesis of plane cross-section of average strain, and summarizers the general regularity of ultimate strength of L-shaped lightweight aggregate concrete columns. Base on the works offerded in the paper, a computer program of numerical iterative method for the strength analysis of L-shaped lightweight aggregate reinforced concrete columns was specially compiled. With this program, N-M interrelated curves and Mx-My interrelated curves of L-shaped columns can been gained, and the program of check of ultimate strength and the program of reinforcement calculation of L-shaped cross-section of lightweight aggregate reinforced concrete columns can be putted forward. The comparison between the calculational theoretically results and the experimental results shows that the calculational theoretically results agree well with the experimental results. Beside, lightweight aggregate reinforced concrete can meet strength of the struture, and be applicable to the specially shaped column frame structure system.