Experimental monitoring of the strengthening construction of a segmental box girder bridge and field testing of external prestressing tendons anchorage

2011 ◽

Vol 243-249 ◽

pp. 1553-1556

Author(s):

Rong He ◽

Wei He ◽

Yan Feng Su

Keyword(s):

Mechanical Characteristics ◽

Steel Plate ◽

Simulation Method ◽

Original Design ◽

Box Girder ◽

External Prestressing ◽

Disaster Situation ◽

Box Girder Bridge ◽

Girder Bridge ◽

Strengthening Method

According to the mechanical characteristics of the continuous box girder bridge and the disaster situation, a combined strengthening method was used to strengthen Yingyugou Viaduct. The 3D numerical simulation method was used to analyze the effectiveness of external prestressing reinforcement technology, external sticking steel plate method, increasing section method and gluing CFRP method. Based on the analysis, the original design scheme was optimized to take advantage of each strengthening method, and improve the overall effectiveness of the combination strengthening method.

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Results from field testing A curved box girder bridge using simulated earthquake loads

Earthquake Engineering & Structural Dynamics ◽

10.1002/eqe.4290221006 ◽

1993 ◽

Vol 22 (10) ◽

pp. 905-922 ◽

Cited By ~ 4

Author(s):

James A. Richardson ◽

Bruce M. Douglas

Keyword(s):

Field Testing ◽

Box Girder ◽

Earthquake Loads ◽

Box Girder Bridge ◽

Girder Bridge

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Study of the Effect on Efficiency of External Prestressing and Economy to Box-Girder Bridge with Different Styles of Webs

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.256-259.1605 ◽

2012 ◽

Vol 256-259 ◽

pp. 1605-1608

Author(s):

Jin Song Zhu ◽

Jian Feng Li

Keyword(s):

Life Cycle Cost ◽

Quantitative Research ◽

Design Method ◽

Structural Performance ◽

Box Girder Bridges ◽

Box Girder ◽

Girder Bridges ◽

External Prestressing ◽

Box Girder Bridge ◽

Girder Bridge

Prestressed box-girder bridges have been applied in modern bridges widely as the perfect structural performance, the design method and calculation theory of prestressed box-girder bridges have been relatively perfect. The self-weight of box-girder bridges is reduced during the process of development from concrete structure to composite structure. The prestressed efficiency and the economy are also improved, simultaneously. But up to now, the quantitative research of the effect on efficiency of external prestressing to box-girder bridge with different styles of webs is lack. This paper illustrates the effect on efficiency of external prestressing and economy to box-girder bridge with different styles of webs. The results show that the box-girder bridge with corrugated steel webs has the highest prestressed efficiency and the lowest life cycle cost and the best economy.

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Optimal Sensor Placement of a Box Girder Bridge Using Mode Shapes Obtained from Numerical Analysis and Field Testing

Revista EIA ◽

10.24050/reia.v17i34.1296 ◽

2020 ◽

Vol 17 (34) ◽

pp. 1-12

Author(s):

Álvaro Viviescas ◽

Gustavo Chio Cho ◽

Oscar Begambre ◽

Wilson Hernandez ◽

Carlos Alberto Riveros-Jerez

Keyword(s):

Information Matrix ◽

Sensor Placement ◽

Field Testing ◽

Optimal Number ◽

Mode Shapes ◽

Optimal Sensor Placement ◽

Box Girder ◽

Weight Effect ◽

Box Girder Bridge ◽

Girder Bridge

This paper presents a comparative study of an Optimal Sensor Placement (OSP) implementation conducted in a box girder bridge using experimental and numerical mode shapes obtained at different construction stages. It is widely recognized that monitoring the dynamic response of bridges during different construction stages provides valuable information to adjust design considerations. Therefore, there is a need for the development of OSP implementations in order to find the optimal number of sensors needed for real applications. In the present study, an OPS method based on the maximization of the Fisher Information Matrix (FIM) is used. The use of experimentally derived and numerical based mode shapes is considered in the determination of the optimal sensor locations. Field testing results previously conducted before connecting the central segment of the main span are also included in this study. The asphalt pavement weight effect in OSP determination is also analyzed by considering field testing.

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