|Table of Contents|

Robust estimation method for short-line matching method of prestressed concrete beam bridges(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年04期
Page:
118-129
Research Field:
桥隧工程
Publishing date:

Info

Title:
Robust estimation method for short-line matching method of prestressed concrete beam bridges
Author(s):
MENG Junmiao1; 2;  JIA Jinglin1; 2;  LIU Yongjian1; 2;  LIU Jiang1; 2;  XIAN Jianping2; 3;  XIAO Jun2; 3
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Shaanxi Province “Four Bodies-one Union” College-enterprise Union Research Center of Bridge Engineering Intelligent Construction Technology, Chang'an University, Xi'an 710064, Shaanxi, China; 3. CCCC Second Highway Engineering Co., Ltd., Xi'an 710065, Shaanxi, China)
Keywords:
prefabricated beam bridge;  robust estimation;  total least square method;  short-line matching method;  coordinate transformation
PACS:
U448.21
DOI:
10.19815/j.jace.2024.03042
Abstract:
Aiming to the alignment control of prestressed concrete beam bridges prefabricated by short-line matching method, considering the possible random errors and gross errors in the measured values of segmental beam control points, a total least square robust estimation method with constraints was proposed, which was suitable for the alignment control of short-line matching method. The solution method was derived and the specific steps were given. A certain span of a 6×60 m continuous rigid frame in Huangmaohai sea-crossing channel project was used as the reference for data simulation. The results show that the method can correct the error of the prefabrication alignment caused by various errors during construction process in real time, and effectively prevent the accumulation of construction errors and measurement errors in subsequent segmental beams. The comparison with the existing algorithms shows that the accuracy of the proposed algorithm is the highest. The mean difference between the end of the terminal segment and the reference alignment is the smallest. Moreover, the mean square sum of the deviations representing the continuity of the general alignment is similar to the result of the least square method, which is better than the traditional point selection control method.

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Last Update: 2024-07-20