Numerical modeling on post-local buckling behavior of circular and square concrete-filled steel tubular beam columns
Numerical modeling on post-local buckling behavior of circular and square concrete-filled steel tubular beam columns
复制标题
圆形和方形钢管混凝土梁柱局部屈曲行为数值模拟
DOI：
10.1007/s13296-016-6022-0
复制
发表时间：
2016-06
影响因子：
1.5
通讯作者：
Mou B
中科院分区：
文献类型：
--
作者：
Bai Yongtao;Bai Yongtao;Lin Xuchuan;Mou Ben;Mou B
钢管混凝土压弯构件在低周反复荷载作用下，约束钢管的局部屈曲、约束混凝土的压碎和滑移对构件的强度和刚度退化有重要影响。本文提出了一种基于纤维单元离散化的数值模型，用于模拟矩形和圆形钢管混凝土梁柱在轴压和循环荷载作用下的劣化行为。通过引入统一的参数来控制钢管混凝土压弯构件的劣化程度，提出了钢管混凝土压弯构件中钢筋和混凝土的单轴应力应变关系。局部屈曲引起的轴向收缩通过定义一个非弹性区域来解释，该区域保证塑性和强度退化。通过与相关实验结果的对比，验证了数值模型的正确性.分析了圆钢管混凝土压弯构件和矩形钢管混凝土压弯构件的径厚比、混凝土强度和钢筋强度对构件劣化性能的影响。最后，通过识别引起钢管混凝土框架整体强度退化的极限状态，建立的数值模型可用于模拟钢管混凝土框架在大变形下的整体性能。
In concrete-filled steel tubular (CFST) beam-columns under cyclic loadings, local buckling of restrained steel tube, crushing and slipping of the confined concrete could have significant influences on strength and stiffness degradation. This paper presents a numerical model based on fiber element discretization for simulating the deterioration behaviour of both rectangular and circular CFST beam columns under axial load and cyclic loading. Uniaxial stress-strain relationships for steel and concrete in CFST beam columns are proposed by introducing unified parameters to control the extent of deterioration. Axial contraction caused by local buckling was accounted by defining an inelastic region that promises plasticity and strength degradation. The numerical model was validated by comparing the simulation results and the associated experimental results. The influences of diameter-to-thickness ratio, concrete and steel strength ranging from normal strength to high strength on the deterioration behavior of circular and rectangular CFST beam-columns were analyzed. Finally, through recognizing the limit state to trigger global strength degradation of a CFST frame, the developed numerical model is applicable for simulating global behavior of CFST frames under collapse-level deformations.
登录
查看更多内容
DOI：
10.1142/s0219455404001331
发表时间：
2004-12
影响因子：
3.6
作者：
V. Gayathri;N. E. Shanmugam;Y. Choo
通讯作者：
V. Gayathri;N. E. Shanmugam;Y. Choo
DOI：
--
发表时间：
1997-07
期刊：
--
影响因子：
--
作者：
Yamaji Yujiro;山地 雄二郎;千秋 松井;Matsui Chiaki;Tsuda Keigo;恵吾 津田;Fujinaga Takashi;隆 藤永
通讯作者：
Yamaji Yujiro;山地 雄二郎;千秋 松井;Matsui Chiaki;Tsuda Keigo;恵吾 津田;Fujinaga Takashi;隆 藤永
DOI：
10.1061/(asce)0733-9445(1988)114:8(1804
发表时间：
1988-08-01
期刊：
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
影响因子：
--
作者：
MANDER, JB;PRIESTLEY, MJN;PARK, R
通讯作者：
PARK, R
DOI：
10.1061/(asce)0733-9445(2004)130:2(189
发表时间：
2004-02
期刊：
Journal of Structural Engineering-asce
影响因子：
--
作者：
E. Inai;A. Mukai;Kai Makoto;Hiroyoshi Tokinoya;T. Fukumoto;K. Mori
通讯作者：
E. Inai;A. Mukai;Kai Makoto;Hiroyoshi Tokinoya;T. Fukumoto;K. Mori
影响因子：
4.1
作者：
Bo Wu;Xinyu Zhao;Jin-Suo Zhang
通讯作者：
Bo Wu;Xinyu Zhao;Jin-Suo Zhang