摘要
通过对福建省境内某技术状况为3类的特大跨径钢筋混凝土拱桥进行荷载试验及数据分析,了解中等缺损的大跨径钢筋混凝土拱桥的实际工作状态。运用大型有限元软件Midas Civil建立空间模型,对该桥拱肋的实测值与计算值分别进行了比较。结果表明:对于静载试验,结构的静刚度和强度均满足设计要求,但残余较大,存在较大的不可恢复变形;对于动载试验,桥梁的动刚度较小,实测冲击系数略高于计算值;利用动应变时程曲线计算动载校验系数,校核常规试验的结果也为快速荷载试验提供了参考依据。
Through some load tests and data analysis for extra long-span reinforced concrete arch bridge whose technical condition class is three in Fujian Province, the actual working conditions of long-span reinforced concrete arch bridge of medi- um defect are understood. In this article, the spatial models are established by finite element software Midas Civil, and the measured and calculated values of arch rib are respectively compared. The results of static load testing indicate that structural static stiffness and strength meet the design requirements, but there is a big unrecoverable deformation. For dynamic load tes- ting, the dynamic stiffness of the bridge is relatively small, the impact factor is measured slightly higher than the calculated value. By taking advantage of dynamic strain time distance curve a calibration coefficient is calculated to check the results of routine load testing, which provides reference frame for the fast load testing.
出处
《四川理工学院学报（自然科学版）》
CAS
2015年第6期77-82,共6页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
荷载试验
校验系数
大跨径拱桥
静载
动载
load testing
verification coefficient
long-span arch bridge
static load
dynamic load
