Experimental Study And Simulation Analysis On Shear Capacity Of Steel Reinforced Concrete L-Shaped Short Columns

Reinforced concrete special-shaped columns have captured considerable attention and attracted wide research for their distinctive sections, which greatly enlarge architectural space. Nowadays, they have been widely applied in some regions where seismic intensity is under 8°. Meanwhile, the authorities have already issued related regulations. However, due to their special sections, shear strength of reinforced concrete special-shaped columns is subjected to limit, preventing their efficient application. Therefore, without section alteration, the focus is shifted to improvement of special-shaped columns shear capacity and expansion of their applied areas. The research shows that addition of steel to special-shaped columns will contribute to the improvement of their comprehensive performance. Thus, it can be regarded as a preliminary exploration to conduct some research on shear capacity of L-shaped components.Through careful experiments and simulation analysis of data, this dissertation is mainly devoted to the study on shear strength of steel reinforced concrete L-shaped short columns. The research work and the main contributions can be listed as follows:Firstly, the author concentrates on the experimental design of 14 steel reinforced concrete L-shaped short columns and 2 reinforced concrete L-shaped short columns. Then, shear strength of those columns is carefully studied. Furthermore, the data of shear strength and destructive shape are collected while experiments are carrying on.Secondly, the considerable research has been dwelled on shear strength of steel reinforce concrete L-shaped short columns. Initially, the author analyses the destructive shapes, processes and causes of those columns. Following, based on the comparative study of those experimental analysis, great effort has been made to infer the rule of their shear strength under the influence of following factors: steel ratio, axial pressure ratio, shear span ratio and hooped ratio. Meanwhile, using the method of accumulated intensity, the author obtains the formula for shear strength of steel reinforced concrete L-shaped short columns, whose calculated results are in good agreement with the test data. Definitely, the test results show that the shear capacity of steel reinforced concrete L-shaped short columns is much superior to that of reinforced concrete L-shaped columns.Lastly, with the application of FEM software to 10 experimental columns and 9 newly added steel reinforced concrete L-shaped columns, the paper is focused on preliminary simulation analysis on shear capacity. The calculated results are in quite agreement with the test data. Results illustrate that axial pressure ratio, hooped ratio and steel ratio are all important factors which influence shear strength of L-shaped columns. Thus, with the application of FEM software, it is feasible to carry on simulation analysis of steel reinforced concrete L-shaped columns.