摘要
针对对称布置的连续刚构桥跨中施工预拱度的线形拟合问题,提出假设:仅考虑桥梁半跨挠度来进行拟合,再通过对称得到另外半跨的挠度,可以减少曲线参数使计算简便。通过理论分析说明了三种拟合方法都是可取的,利用工程实例的有限元建模以及数据处理,进证明了假设的正确性,得出结论:三次多项式拟合的决定系数为0.9891;高斯拟合的决定系数为0.9734;正弦函数拟合的决定系数为0.9915。三次多项式拟合和正弦函数拟合均可用于施工预拱度线形的计算中,所得施工预拱度线形结果可靠,其中正弦函数拟合结果最为准确。
Aiming at the linear fitting problem of the construction precamber of the continuous rigid frame bridge with symmetrical arrangement,the assumption that only the half-span deflection of the bridge is considered for fitting,and then the deflection of the other half-span is obtained through symmetry is proposed,which can reduce the curve parameters and make the calculation simple.Through theoretical analysis,it is proved that the three fitting methods are all advisable.By using the finite element modeling and data processing of engineering examples,the correctness of the hypothesis is further proved,and the conclusion is drawn:the determination coefficient of cubic polynomial fitting is 0.9891;The determination coefficient of Gauss fitting is 0.9734.The fitting coefficient of sine function is 0.9915.Both the cubic polynomial fitting and sinusoidal function fitting can be used in the calculation of construction pre-arch line,and the results obtained are reliable,among which the sinusoidal function fitting results are the most accurate.
作者
刘嘉欣
钟元庆
丘礼球
张文韬
LIU Jia-xin;ZHONG Yuan-qing;QIU Li-qiu;ZHANG Wen-tao(School of Highway,Chang’an Uniwersity,Xi’an 710064,China;Fujian Zhanglong Section of Xiarong Expressway Widening Project Co.,Ltd.,Longyan 364000,China)
出处
《长江工程职业技术学院学报》
CAS
2020年第3期4-8,共5页
Journal of Changjiang Institute of Technology
关键词
连续刚构桥
施工预拱度
多项式拟合
高斯拟合
正弦函数拟合
continuous rigid frame bridge
construction precamber
polynomial fitting
Gaussian fitting
sinusoidal function fitting
作者简介
刘嘉欣(1997-),女,河南南阳人,硕士研究生在读,主要从事桥梁工程研究。
