摘要
单箱多室截面的预应力混凝土连续梁桥,由于多道腹板的影响,横梁的剪力分布范围较大,在横梁上设置人孔将对梁体形成削弱,引起明显的应力集中,影响结构安全,故一般须对人孔周围进行加强配筋设计。鉴于预应力混凝土横梁开洞的复杂应力状态,通过对一座单箱双室截面的预应力混凝土连续梁桥设置人孔的中横梁的分析,运用空间有限元模型计算了预应力横梁孔洞周边的应力情况,为人孔的配筋设计提供依据。
Due to the impact of multi-web,the shear distribution along crossbeams of the prestressed concrete girder bridge which has mono-box with multi-cells cross-section is large and vast,so the manhole in the crossbeam which causes section weaken and significant stress concentration,will effect structural safety.On account of the complex stress state around the manhole in prestressed reinforced concrete crossbeams,spatial finite element model is used to calculate the stress around manholes through the analysis of the middle crossbeam (which has manholes in) of a prestressed concrete continuous beam bridge that has mono box with double cells section,and the analysis can direct reinforcement design around the manhole.
出处
《中国市政工程》
2010年第3期24-26,共3页
China Municipal Engineering
关键词
预应力混凝土连续梁桥
单箱多室
横梁
人孔
有限元
应力
prestressed concrete continuous beam bridge
mono-box & multi-cells
crossbeams
manhole
finite element
stress
