（1 广州大学土木工程学院， 广州 510006； 2 中山大学土木工程学院， 广州 510275; 3 广州大学\|台湾淡江大学工程结构灾害与控制联合研究中心， 广州 510006)

［摘要］为了研究单点往复荷载作用下钢管混凝土拱柱结构的抗震性能，设计了一个由两个正方形截面的钢骨混凝土柱与单个圆钢管混凝土拱肋组成的单层单跨钢管混凝土拱柱结构，进行了低周往复加载静力试验和有限元分析。结果表明：结构靠近加载点侧的柱脚和拱脚区域首先出现塑性铰，且损伤相对较严重；结构正向加载的承载能力特征值和屈服位移略小于反向加载对应值，但强屈比、延性系数和刚度略大于反向加载时的对应值，应按位移进行设计控制；结构屈服后的滞回环面积和等效粘滞阻尼系数均呈现大幅度提升，表现出了较好的抗震耗能能力；等效梁柱法可用于预测钢管混凝土拱柱结构的承载力变化规律。

［关键词］钢骨混凝土柱； 钢管混凝土拱； 抗震性能； 低周往复加载

中图分类号：TU398+.9文献标识码：A文章编号：1002-848X(2018)02-0093-05

Experimental study and FEM analysis on the seismic behavior of concrete filled steel tubular arch-column structure

Xu Yong1,2, Zhou Cuiying2, Liu Airong3, Zhang Jichao1

(1 School of Civil Engineering, Guangzhou University, Guangzhou 510006， China; 2 School of Civil Engineering, Sun Yat-Sen University， Guangzhou 510275， China; 3 Guangzhou University-Danjiang University (Taiwan) Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou 510006， China)

Abstract:To investigate the seismic behavior of concrete filled steel tubular (CFST) arch-column structure, a single-layer single-span CFST arch-column structure was designed composed of two steel reinforced concrete columns with square section and single circular CFST arch rib, and  low cyclic loading static test and finite element analysis were conducted. The results show that the plastic hinge first appears in areas of column foot and arch foot near the loading point side, and the damage is relatively serious; the characteristic values of bearing capacity and  yield displacement of the structure under  positive loading are slightly less than the corresponding values under reverse loading, but ratio of intensity and yield strength, ductility coefficient and stiffness is slightly larger than the corresponding values under  reverse loading, and the design should be controlled according to the structural displacement; after yielding, the hysteresis loop area and the equivalent viscous damping coefficient are greatly improved, showing good energy dissipation capacity; equivalent beam-column method can be used to predict the variation of the bearing capacity of concrete filled steel tubular arch-column structure.

Keywords:steel reinforced concrete column; concrete filled steel tubular arch; seismic behavior; low cyclic loading 

*国家自然科学基金资助项目(11272095，51378133),国家留学基金资助项目（201709945010）,住房和城乡建设部科技计划资助项目（2013-K4-38）。

作者简介：许勇，博士，副教授，Email: xyjerry1975@126.com。