摘要
为研究半整体无缝斜桥搭板在温度荷载下的受力性能,用ABAQUS软件建立了搭板的有限元模型,并依托浙江湖州贯边桥工程的实测数据校准该模型.通过改变斜交角、基层和搭板垫层类型,对半整体无缝斜桥搭板在极端温度荷载作用下的平面内受力性能进行了研究.结果表明：当斜交角在15°~60°间,半整体无缝斜桥搭板的最大应力均发生在近桥端的顶层钝角处,建议设计时该角部位置的钢筋配筋率应大于其它角部的配筋率;在温度荷载下,基层选用沥青碎石或水泥碎石对搭板的最大应力影响很小;选用砂土作为垫层时,能较大程度地减小搭板内的应力,在进行半整体无缝斜桥的设计时,宜选用砂土作为搭板的垫层.
In order to study the mechanical properties of approach slabs of semi - integral abutment skew bridges under thermal load, a finite element model （FEM） of an approach slab was built by using general finite element software ABAQUS. According to measured data of Huzhou Guanbian bridge, correction of the finite element model was done. The mechanical properties of the approach slab of semi - integral abutment skew bridges under thermal load had been investigated, by changing skew angle, type of base course and cushion. The results showed that when the skew angle of a semi - integral abutment bridge is 15~ to 60~, maximum stress area of the approach slab is top obtuse area which is close to the bridge, thus, this area must be reinforced during the design. Under thermal load, there is little difference between the stress of an approach slab with asphalt macadam base and that with cement macadam base. The stress of approach slab decreases significantly by using the sand cushion instead of plain concrete cushion layer, so the sand cushion should be a suitable choice when designing approach slabs of semi - integral abutment skew bridges.
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2016年第4期480-486,共7页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51278126)
福建省自然科学基金资助项目(2013J01187)
关键词
半整体式桥台桥梁
斜桥
搭板
有限元模型
实桥监测
受力性能
semi - integral abutment bridges
skew bridge
approach slab
finite element model
field monitoring
mechanical properties
