A Study On The Probability Distribution Of Load-Bearing Capacity For Normal Section Of R.C Equiaxial Special-shaped Columns

As their widths are generally consistent with the thickness of the wall, special-shaped R.C columns are out of the shortcoming of rectangular columns' prominence in corridor and interior, making buildings more beautiful and enhancing the effective usable floor area of rooms, thus, special-shaped R.C columns in civil engineering are getting widely applied. And in-depth studies had been done by scholars home and abroard, however, most of the studies were concentrated on the deterministic parsing, and there were few special studies on the reliability of special-shaped R.C columns. Traditional structure reliability analysis method is to utilize the function Z=R-S, where R is the resistance of structure and S is the load effect on the structure. According to the distributions of R and S, the probability of Z>0, namely the reliability of structure can be got by such methods as first-order-second-moment and JC methods. Considering the specificity of special-shaped R.C column's section, although its load-bearing capacity for normal section curve has similar type as rectangular column, it has much more influence factors such as dimensions of section, strength of concrete, load type and magnitude, and especially its load-bearing capacity varies as the load direction changes. For the lackness of tentation data, the distribution of R of special-shaped R.C column was not much clear, which make traditional structure reliability analysis method supportless. For the better study of the reliability of special-shaped R.C column, the distributions of the minimum load-bearing capacity for normal section of R.C equiaxial special-shaped columns were studied by considering the design parameters...