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本文对T、十、环形截面的回转半径i与截面高度h之间的关系,作了理论推导,得出各类型的通式。对T,十、环形截面构件截面塑性影响系数进行了理论探索,根据试验数据,找出T、十、环形截面砖构件,以偏心距e与截面形心至边缘距离y之比值e/y为参数的截面塑性系数r的计算式。 本文依据弹性理论得出柱弹性弯曲影响系数γα(?),再依据试验数据求出柱的塑性弯曲影响系数γαρ,将γ(?)与γ(?)合并为γα,代表柱的弹塑性弯曲影响,如此可使砖柱的计算大为简化,经T形截面砖柱验算结果与试验符合较好。
This paper makes a theoretical deduction of the relationship between the radius of gyration i and the height h of the cross-sections of T, X, and the ring section and obtains the general formulae of each type. A theoretical exploration was made on the plasticity factors of the cross-sections of T and X ring-shaped cross-section members. Based on the test data, the T, X, and R-section bricks were found. The ratio e/y between the eccentricity e and the cross-sectional centroid-to-edge distance y was The calculation formula for the coefficient of section plasticity r. In this paper, elasticity theory is used to obtain the coefficient of elastic bending of the column, γα(?), and then the plastic bending influence coefficient γαρ is calculated based on the test data. The γ(?) and γ(?) are combined into γα, which represents the elastic-plastic bending of the column. The effect is that the calculation of the brick column is greatly simplified, and the checking result of the T-shaped cross-section brick column is in good agreement with the test.