摘要
本文用一种新的高效壳体单元离散预应力混凝土箱梁,在较稀的网格划分下,考虑与时间无关的非线性因素,分析了预应力混凝土箱梁的结构行为。所涉及的非线性特性有:混凝土材料的正交各向异性本构;由混凝土开裂或压碎及钢筋屈服所引起的非线性。还考虑了混凝土开裂后的软化性质。计算结果与实验梁的量测值吻合较好。
The structural behaviour of prestressed concrete box girders is analyzed by using a high efficient flat shell element to discrete the girders with a coarse mesh, considering the time-indelendent material nonlinearities of concrete, such as the biaxial ortho- tropic model, damage and softening in tension zone of concrete, by means of the concrete fracture mechanics parameters. Analy- tical results agree well with those from experiments.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1990年第2期54-62,共9页
Journal of Southwest Jiaotong University
基金
国家教委资助博士点研究课题
