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| In-plane creep stability analysis for concrete-filled steel tubular circular truss arches |
| Received:May 23, 2013 Revised:August 30, 2013 |
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| DOI：10.7511/jslx201405008 |
| KeyWord:concrete filled steel tubular truss arch creep effect shearing deformation bifurcation buckling snap-through bucking |
| Author | Institution |
| 董宁娟 |
南京航空航天大学 机械结构力学及控制国家重点实验室, 南京 |
| 刘超 |
西安建筑科技大学 理学院, 西安 |
| 赵洪金 |
中交第一公路勘察设计研究院有限公司, 西安 |
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| Abstract: |
| For concrete-filled steel tube arch ribs,the creep of concrete would increase the pre-buckling deformation which will reduce the in-plane buckling resistance significantly,therefore only included in the influence of pre-buckling deformation on the stability behavior,creep stable bearing capacity can be accurately obtained of concrete filled steel tube arches.In this paper,based on the theory of nonlinear buckling of shallow arch,the nonlinear in-plane equilibrium and buckling equations for CFST truss arches are established by using the principle of virtual work.By solving these equations,a-symmetric bifurcation buckling and symmetric snap-through bucking creep stability load are proposed of pin-ended arches and fixed arches,and the effect of core concrete creep on the stability of CFST arches has been studied.In addition,the influence of modified slenderness,central and creep coefficient on creep buckling behaviors has been investigated,providing theoretical basis for long-term design of concrete filled steel truss arches. |
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