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.
出处
《公路交通科技》
CAS
CSCD
北大核心
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)
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
finite element
virtual laminated element method
prestressed concrete
equivalent loads
box-shape girders
