Ultimate Load Test of Slab‐on‐Girder Bridge

There is a common phenomenon of shear failure in RCC beams, especially in old buildings and bridges. Any possible strengthening of such beams is needed to be explored that could strengthen and make them fit for serviceable conditions. The present research has been made to determine the performance of predamaged beams strengthened with three-layered wire mesh polymer-modified ferrocement (PMF) with 15% styrene-butadiene-rubber latex (SBR) polymer. Forty-eight shear-designed and shear-deficient real-size beams were used in this experimental work. Ultimate shear load-carrying capacity of control beams was found at two different shear-span (a/d) ratios 1 and 3. The sets of remaining beams were loaded with different predetermined damage levels of 45%, 75%, and 95% of the ultimate load values and then strengthened with 20 mm thick PMF. The strengthened beams were then again tested for ultimate load-carrying capacity by conducting the shear load test at a/d = 1 and 3. As a result, the PMF-strengthened beams showed restoration and enhancement of ultimate shear load-carrying capacity by 5.90% to 12.03%. The ductility of strengthened beams was improved, and hence, the corresponding deflections were prolonged. On the other hand, the cracking pattern of PMF-strengthened beams was also improved remarkably.

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Study on Crack Causes and Strengthening Measures of Large Span PC Continuous Box Girder Bridges

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.3551 ◽

2010 ◽

Vol 163-167 ◽

pp. 3551-3554

Author(s):

Wei Peng ◽

Zhi Xiang Zha

Keyword(s):

Prestressed Concrete ◽

Load Test ◽

Box Girder Bridges ◽

Element Analysis ◽

Box Girder ◽

Girder Bridges ◽

Long Span ◽

Concrete Box Girder Bridges ◽

Girder Bridge ◽

Engineering Projects

This template Based on cracks observation and finite element analysis of real engineering projects as well as bridge load test after reinforcement, causes and types of cracks in prestressed concrete box girder bridges and treating measurements are systematically studied. The results obtained from the calculation are presented to demonstrate the effect of sensitive factors, such as arrangement of longitudinal prestressed tendons, the magnitude of vertical prestressed force, temperature gradient, etc. The results show that the arrangement of longitudinal prestressed tendons and the magnitude of vertical prestressed force take key roles in cracks control of box girder webs. Lots of treating measurements are presented in accordance with different types of cracks, some of them are applied to a reinforcement engineering of a long span pretressed concrete continuous box girder bridge with cracks. Load test after reinforcement of the bridge demonstrates the reasonability of the treating measurements. Several design recommendations and construction measures about reinforcements and some sensitive factors mentioned above are proposed to control cracks.

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Load Test Analysis of Long-Span Prestressed Concrete Continuous Beam Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1030-1032.798 ◽

2014 ◽

Vol 1030-1032 ◽

pp. 798-801

Author(s):

Hua Su

Keyword(s):

Bearing Capacity ◽

Prestressed Concrete ◽

Highway Bridges ◽

Load Test ◽

Beam Model ◽

Test Analysis ◽

Single Beam ◽

Long Span ◽

Continuous Beam Bridge ◽

Girder Bridge

This paper takes a 45+60+45m prestressed concrete continuous box Girder Bridge as background, based on “Specification for Inspection and Evaluation of Load-bearing Capacity of Highway Bridges” (JTG/T J21-2011), single beam model and solid model are built for schematic design of load test. Compare the measured value and the theoretical value, and evaluate the bridge bearing capacity, finally provide technical base for project checking and accepting.

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Analysis of load test on composite I-girder bridge

Journal of Civil Structural Health Monitoring ◽

10.1007/s13349-017-0223-x ◽

2017 ◽

Vol 7 (2) ◽

pp. 163-173 ◽

Cited By ~ 2

Author(s):

F. Huseynov ◽

J. M. W. Brownjohn ◽

E. J. O’Brien ◽

D. Hester

Keyword(s):

Load Test ◽

Girder Bridge

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Experiment Study on Mechanical Characteristics Box Girder Bridge Considering Deck Pavement

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.1216 ◽

2011 ◽

Vol 90-93 ◽

pp. 1216-1219

Author(s):

Yan Zeng ◽

Guang Bin Zhang ◽

Zhi Yong Wang

Keyword(s):

Bearing Capacity ◽

Work Performance ◽

Mechanical Characteristics ◽

Load Test ◽

Experiment Study ◽

Box Girder ◽

Bonding Performance ◽

Girder Bridge ◽

Test Result ◽

Actual Stress

In order to understand the mechanical characteristics of shenqiu Zhidian Bridge considering the influence of pavement, On the basis of installing steel mesh in rigid bridge or consecution to enhance the bonding performance between the pavement and girder, the load test is conducted. According to the test result and the calculations result the bearing capacity and work performance of bridge are evaluated. The results show that in the design of bridge, by enhancing the bonding performance between the pavement and girder, considering the overlaid pavement participating in force corresponds with the actual stress structure.

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STUDY ON SPATIAL STRESS EFFECT OF PC CONTINUOUS THIN-WALLED BOX GIRDER BRIDGE

Stavební obzor - Civil Engineering Journal ◽

10.14311/cej.2021.03.0048 ◽

2021 ◽

Vol 30 (3) ◽

Author(s):

Honglei Zhang

Keyword(s):

Finite Element ◽

Load Test ◽

Bottom Plate ◽

Stress Effect ◽

Shear Lag ◽

Element Analysis ◽

Box Girder ◽

Lag Effect ◽

Girder Bridge ◽

Spatial Stress

In order to study the influence of spatial stress effect and shear lag effect on the cracking of PC continuous thin-walled box girder bridge, a spatial model was established by using ANSYS finite element software to analyze the internal stress distribution of the bridge. The test results are compared with the analysis results of spatial model and plane link system model through the load test of real bridge. The results show that the longitudinal stress is evenly distributed along the width direction, which means that the spatial stress effect and the shear lag effect have little influence on the downdeflection of the bridge. The shear lag coefficient at the longitudinal axis of midspan bottom plate and the intersection of bottom plate and web are larger than other positions, which is most likely to produce cracks caused by stress concentration, and should be strengthened here in practical engineering. The results of load test show that the results of spatial finite element analysis are more reliable than those of plane link system calculation, and the design and construction based on the results of spatial finite element analysis is safer.

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Experimental Study on Three-Span Continuous Wide Curved Box Girder Bridge Model

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.638-640.937 ◽

2014 ◽

Vol 638-640 ◽

pp. 937-941

Author(s):

Jie Jun Wang ◽

Peng Tan ◽

Jiang Ya Yuan ◽

Hai Qing Yuan ◽

Gui Ming Zhang

Keyword(s):

Cross Sections ◽

Load Test ◽

Element Analysis ◽

Box Girder ◽

Uniformity Coefficient ◽

Bridge Model ◽

The Finite Element Analysis ◽

Practical Engineering ◽

Scale Ratio ◽

Girder Bridge

This paper simulates the practical engineering, using plexiglass to make a three-span continuous wide curved box girder model by the geometry scale ratio 1:30. With the model load test, measured the strain and deflection of the control cross-sections, got the distribution about the stress and deflection of the wide curved continuous box girder; And we proposed the “uniformity coefficient” to express the uneven force of the curved bridge. Compared the finite element analysis results and experimental data, the results show both are in good agreement.

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