Shear Behaviors Research Of Steel-reinforced Concrete Column

Steel-Reinforced Concrete is a composite structure with steel covered by reinforced concrete. Steel-reinforced concrete structure has very well seismic resistance performance, high bearing capacity, flame resistance, and good durability. Recently, it has been widely used in high-rise buliding, super high-rise buliding, and great span structures. with the span ratio of 1.5≤λ≤2.5, the bond failure can easily happen on SRC column. In this case, the shear behaviors and seismic resistance performances are different from those SRC columns with the span ratio ofλ≤1.5 and . 2.5≤λ.In the shear behaviors analysis of SRC column, the influence of steel's flange is normally ignored. However, the flange of steel are actually influencing distortion performance when the column is bond failure, especially in the wide-edge case. Based on the experiment, combined with theoretical analysis, this dissertation comes up with the formula of shear bearing capacity of full-web SRC column with bonding failure. The result coincides quite well with the experiment. The dissertation also gives suggestions to the shear bearing capacity formula in the case of bond failure.This dissertation adopting on strut-arch model which is applied to the shear analysis for frame-column to analyze the shear capacity of the reinforced concrete part of SRC column. The stress of steel shape is adopting the formula of steel shape shear bearing capacity from ?Technical Specification for Steel-Reinforced Composite Concretes?. The theoretical result coincides very well with the experiment in the case of short column. The dissertation also discussed whether the SRC column is strong enough to resist seisme when it is getting distorted and yielding.Steel is one of the main materials in SRC structure. The content of steel greatly affects shear capacity and seismic resistance. When SRC column is stressed by shear supporting capacity, the column must be distorted somehow. So according to the distortion performance, this dissertation not only brings up the division standards for the ranks of seismic resistance of SRC column, but also discussed the affects and mechanism that how steel is working on SRC column. Besides, the dissertation comes up with the ratio of steel shear bearing capacity and the column section(ns), and also the ratio of flange area and component section(nf). These two ratios are used to reflect how steel's flange and web affect distortion performance when they are stressed by maximum shear bearing force. Using ns, nf,λ,ρyv, no as independent variable, through...