CONCRETE-FILLED TUBULAR COLUMNS: PART 2 — COLUMN ANALYSIS
CONCRETE-FILLED TUBULAR COLUMNS: PART 2 — COLUMN ANALYSIS
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DOI：
10.1142/s0219455404001331
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发表时间：
2004-12
影响因子：
3.6
通讯作者：
V. Gayathri;N. E. Shanmugam;Y. Choo
中科院分区：
文献类型：
--
作者：
V. Gayathri;N. E. Shanmugam;Y. Choo
本文提出了钢管混凝土压弯构件在轴压和单调弯曲及循环弯曲共同作用下的柱分析模型。在梁柱分析中采用了分段的方法。梁-柱段的弯曲和轴向刚度是从M-P-φ和M-P-e关系推导出来的，而M-P-φ和M-P-e关系是通过本文第11部分中解释的纤维分析得到的。几何和材料的非线性被考虑和增量平衡方程的基础上制定更新的拉格朗日公式。采用增量迭代的Newton-Raphson迭代法求解方程组。通过引入广义刚度参数，克服了Newton-Raphson方法在逼近极限点时的局限性，从而跟踪了后屈曲响应。通过与已发表文献中的实验值进行比较，验证了模型的准确性。
This paper is concerned with an analytical model for column analysis of concrete-filled tubular beam-columns subjected to the combined action of axial load and monotonic or cyclic bending. A method of segmentation is adopted in the analysis of beam-columns. The flexural and axial rigidities of the beam-column segments are derived from M–P–φ and M–P–e relations obtained through fibre-analysis explained in Part 11 of the paper. Geometric and material nonlinearities are taken into account and incremental equilibrium equations are formulated based on an updated Lagrangian formulation. An incremental-iterative Newton–Raphson iteration technique is adopted to obtain the solution of the equations. The limitation of Newton–Raphson technique in approaching the limit points is overcome by using a generalized stiffness parameter, thereby tracing the post-buckling response. The accuracy of the model is verified by comparing the results with the experimental values available in published literature.