【摘要】 应用非线性有限元方法,对矩形钢管混凝土桁架的受力性能进行了分析,并与圆形钢管混凝土桁架的受力性能进行了比较。结果表明:矩形钢管混凝土桁架的承载力相对于圆形钢管混凝土桁架的承载力要低些,但是结构的塑性和延性都相对较好,与圆形钢管桁架的差别不大;另外,由于矩形钢管混凝土桁架在制作和施工上的方便,弥补了承载力相对较低的缺陷,在经济上仍具有一定的优势。因此,矩形钢管混凝土桁架在桥梁工程上具有较为广泛的应用前景。更多还原

【Abstract】 The behaviors of concrete-filled rectangular steel tubular truss(CFRSTT) are analysed by nolinear finite element method and are compared with concrete-filled circle steel tubular truss(CFCSTT).The results indicate that the bearing capacity of CFRSTT is lower than that of CFCSTT,but its others behaviors are better,almost no diffirences with CFCSTT.In addition to,the advantages of CFRSTT in mading and construction are obvious,which compensate the shorts of CFRSTT in bearing capacity,have some advantages in economy.Therefore,the CFRSTT has an extensively applicated furture in bridge engineering.更多还原