摘要
针对常见的钢筋混凝土梁桥病害中普遍存在的上部结构承载力不足、桥下净空有限的情况,提出了一种增加主梁加固的新方法,并采用空间有限元分析了加固前后桥梁的静、动力性能。同时,分析了新增主梁与旧主梁的刚度比对于加固效果的影响。结果表明：采用增加主梁法加固钢筋混凝土梁桥,加固效果良好,对加固后桥梁的纵、横向刚度提高明显;新、旧主梁刚度比采用0.5～0.7时,可采用新增空心主梁法加固,加固效果明显且更为经济。
According to the main diseases of RC beam bridge with the lakage of bearing capacity and the limited clearance of span, this paper puts forward a new strengthening method for it with adding beams. Based on the 3D finite element model, the static and dynamic behaviors of the bridge are analyzed, and the influences of the rigidity ratio on strengthened effect are discussed. The results show that： the longitudinal and transverse rigidity of the strengthened bridge is improved greatly; when the ratio of new main beam rigidity to the old main beam rigidity is from 0.5 to 0. 7, the reinforcement with adding hollow beams is more effective and economical. 6 tabs, 6 figs, 7 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第4期62-65,共4页
Journal of Chang’an University(Natural Science Edition)
关键词
桥梁工程
钢筋混凝土桥梁
加固
主梁
刚度比
空间有限元
bridge engineering
RC bridge
reinforcement
main beam
rigidity ratio
3D finite element
