波形钢腹板钢管混凝土模型拱面内极限承载力试验研究  

EXPERIMENTAL STUDY ON IN-PLANE ULTIMATE LOAD-CARRYING CAPACITY OF CFST ARCHES WITH CORRUGATED STEEL WEBS

作　　者：高婧[1] 陈宝春[2] 

机构地区：[1]厦门大学建筑与土木工程学院,厦门361005 [2]福州大学土木工程学院,福州350002

出　　处：《工程力学》2010年第3期91-100,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(50778043)

摘　　要：进行了波形钢腹板钢管混凝土模型拱的面内两点非对称和对称加载试验。对模型拱的挠度、钢管应变、波形钢腹板应变、极限承载力等进行了分析。试验结果表明:波形钢腹板钢管混凝土拱是一种受力性能很好的新型组合拱。在这种结构中,波形钢腹板与钢管混凝土弦杆均能发挥其各自的优势。它与钢管混凝土单圆管和哑铃形拱相比,刚度与承载力有了很大提高;与钢管混凝土桁拱相比,避开了节点破坏问题,模型拱呈总体破坏特征,从而使其延性与极限承载力明显提高。有限元分析表明:在承载力分析中应考虑双重非线性的影响。极限承载力简化计算不能采用钢筋混凝土拱的极限状态法,而可以采用钢管混凝土单圆管和哑铃形拱中的等效梁柱法。Two concrete filled steel tubular arches with corrugated steel webs（CFST-CSW arch） were tested under symmetrical and asymmetrical in-plane loadings.The measured deflections,strains of steel tube and corrugated webs,and ultimate loads are recorded.Test results show that the CFST-CSW arch,as a new composite structure,has good behaviors,in which the advantages of both corrugated steel webs and CFST chords can be exploited.Compared with the CFST single tubular arch and dumbbell shaped arch,the rigidity and bearing capacity of the CFST-CSW arch is greatly improved;And the joint failure,occurring commonly in CFST truss arch,can be avoided in CFST-CSW arch,thus its ductility and ultimate loads are improved.The FE analysis results show that the dual non-linearity should be taken into account in calculation of its ultimate load carrying capacity.The Equivalent Beam-Column method employed in CFST single tubular arch and dumbbell shaped arch,rather than the Limit State method employed in RC arch,is valid in the calculation of the ultimate load.

关 键 词：钢管混凝土 波形钢腹板 模型拱 面内 试验 极限承载力 

分 类 号：TU317.1[建筑科学—结构工程]