无筋砌体双向偏心受压构件承载力计算

Calculation of bearing capacity of unreinforced biaxial eccentric compression masonry members

桥梁工程中经常遇到双向偏心受压的砌体构件,但现行的公路桥涵设计规范却没有这方面的内容。为此,对《砌体结构设计规范》中关于无筋砌体矩形截面的双向偏心受压构件承载力影响系数φ值计算公式进行了分析,认为φ值在局部范围内存在着使承载力随偏心距增大而增大等缺陷,并给出了新的计算公式。新公式考虑了双向长柱效应及其耦合作用,计算更为合理,可供公路桥梁设计应用。

Biaxial eccentric compression masonry members are often used in bridge engineering, yet they are not prescribed in the present specifications for design of highway bridges and culverts. The formula prescribed in Code for design of masonry structures, aimed to calculate influence coefficient (φ) for bearing capacity of biaxial eccentric rectangle section compression masonry members, is numerically analyzed, its bearing capacity would increase when its eccentricity of loading is added, a new substitutive formula is suggested as well, which should be more reasonable because two directional long column effect and bi-coupling action are considered, it can be used in bridge design.