预应力混凝土桥梁分析的虚拟层合单元法  

Analysis of Prestressed Concrete Bridge with Virtual Laminated Element Method

作　　者：亓兴军[1] 项贻强 李小军[3] 徐兴[2] 

机构地区：[1]山东建筑工程学院土木工程系,山东济南250101 [2]浙江大学土木工程系,浙江杭州310027 [3]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《公路交通科技》2006年第8期76-80,共5页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助重点项目(50439030)

摘　　要：通过将预应力束对桥梁结构的作用转化为等效荷载,提出了用虚拟层合单元法分析预应力混凝土桥梁的方法。结合一座具体的桥梁进行了实例分析计算,同时利用有限元通用分析程序SuperSAP进行了对比。结果表明,采用虚拟层合单元法分析预应力混凝土桥梁能够给出令人满意的结果,并且具有划分单元数目少、计算效率高、适应性强的优点。The effect of prestressed steel bars on bridge structure is transformed to the equivalent loads, then an approach of analyzing prestressed concrete bridge is presented with virtual laminated element method. Based on an actual bridge, the comparative analytical calculations are done with the proposed approach and the finite element general program Super SAP, The results indicate that the proposed approach can analyze the prestressed concrete bridge with satisfied calculation result, and it has the advantage of less element number, higher calculative efficiency and better suitabitity.

关 键 词：有限元 虚拟层合单元法 预应力混凝土 等效荷载 箱梁 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]