实腹式型钢混凝土异形柱的受力性能研究

Study on the mechanical behavior of solid steel reinforced concrete special-shaped columns

为了研究提高异形柱的承载能力和抗震性能,提出了实腹式型钢混凝土异形柱,并设计了5个试件进行低周反复加载试验,观察了试件的破坏形态,分析其破坏机理,并获取了滞回性能和试件的承载能力等重要参数。利用有限元数值积分法,编写了正截面承载能力的计算机程序;根据试验获取的破坏机理,利用叠加法推导并建立斜截面承载能力计算公式。研究结果表明实腹式型钢混凝土异形柱具有承载能力高、滞回曲线饱满、位移延性好,本文编写的计算机程序和提出的计算公式计算结果与试验结果吻合较好。

In order to improve the beating capacity and seismic behavior of special-shaped columns, a new type of structure component, the solid steel reinforced concrete special-shaped columns, is introduced, and 5 specimens of the column were designed for the low cyclic reversed loading test. The failure patterns, mechanical behaviors, loading beating capacity, loading-displacement hysteretic curves were obtained from the test. According to the experimental study, the computer programs for calculation of the M-N interaction curve were compiled using a numerical iterative method. The calculation results and experimental results show satisfactory agreement. Based on the failure characteristics and mechanism derived from the test, the formulas for calculating the ultimate shear capacity of different steel reinforced concrete （SRC） special-shaped columns are deduced. The calculation resuits are in good agreement with those of the test. Experiment results show that solid steel reinforced concrete special-shaped columns have many obvious merits, such as high beating capacity, good displacement ductility, full hysteretic loop and excellent seismic energy dissipation performance. All of these may be helpful for engineering