Field Load Test of Cable Crane for a Record-breaking Cable-stayed Bridge

Xiangjiang Bridge is a newly built bridge. In order to understand the actual working condition and the bearing capacity of the bridge, the static and dynamic tests are carried out. This paper describes the principles and methods of the load test and the measurement of the stiffness and dynamic characteristics of the bridge structure. Through analyzing the test, the data and information of bridge can be accumulated and the mechanical characteristic of this kind of bridge is discussed.

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Diagnostics of an Existing Cable-Stayed Bridge by Means of the Dynamic Load Test

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.769.200 ◽

2015 ◽

Vol 769 ◽

pp. 200-205 ◽

Cited By ~ 1

Author(s):

Michal Polak ◽

Petr Fajman ◽

Jiri Maca ◽

Tomáš Plachý

Keyword(s):

Dynamic Load ◽

Dynamic Behaviour ◽

Load Test ◽

Diagnostic Methods ◽

Actual State ◽

Bridge Structure ◽

Structural Element ◽

Cable Stayed Bridge ◽

Dynamic Load Test ◽

Bridge Reconstruction

The cable-stayed bridge at the inner ring road in Prague in the Czech Republic was put into operation in 1997. In 2008 a crack was found in the bridge structure area where the end beam was connected with the upper deck of the box section and where the bridge expansion joint system was anchored. The basic objective of diagnostic works, which were started immediately after the finding of the crack, was obtaining the basis for bridge structure modifications, among other things, to prevent formation of similar damages in the future. A series of diagnostic methods was used for determination of the bridge actual state and the real static and dynamic bridge behavior. One of these methods was the dynamic load test. It was focused on an examination of the bridge forced vibration which was caused by dynamic effects of a usual traffic flow. An arrangement of the test was not quite usual because the experiment was concentrated on dynamic behaviour of bridge support areas especially. The abutment area, the pylon area and the area of a pillar with the bearing with a tensile structural element were observed on the investigated bridge. The dynamic load test was performed in two stages. The first stage was focused on investigation of bridge dynamic behaviour in original structural conditions and on obtaining the basis for design of bridge adjustments. The second stage was realized after bridge reconstruction in December 2012 and verified the effectiveness of bridge modifications.

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Inspection and Evaluation of Load-Bearing Capacity of Single Tower Composite Girder Cable-Stayed Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.1785 ◽

2012 ◽

Vol 538-541 ◽

pp. 1785-1788

Author(s):

Xie Dong Zhang ◽

Jin Zhi Wang ◽

Jun Feng Guo

Keyword(s):

Bearing Capacity ◽

Dynamic Load ◽

Static Load ◽

Load Test ◽

Bridge Structure ◽

Static Load Test ◽

Test Measure ◽

Cable Stayed Bridge ◽

Composite Girder ◽

Dynamic Load Test

In order to evaluate single tower composite girder Cable Bridge actual bearing capacity and working property on design using load, a single-tower composite girder cable-stayed bridge is taken as an example, by means of static load test, dynamic load test, reasonably measures evaluates the single tower composite girder cable-stayed bridge's bearing capacity. The static load test measure static properties of bridge structure (static strain, static deflection, etc.), dynamic load test, measure the dynamic properties of bridge structure (vibration frequency, damping, forced vibration amplitude, impact coefficient, etc.). Results show that the rigidity strength integrity and dynamic characteristics of bridge structure are favorable; the structure’s bearing capacity is favorable.

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Dynamic Characteristics of a Double-Pylon Cable-Stayed Bridge with Steel Truss Girder and Single-Cable Plane

Advances in Civil Engineering ◽

10.1155/2021/9565730 ◽

2021 ◽

Vol 2021 ◽

pp. 1-15

Author(s):

Yong Zeng ◽

Yutong Zeng ◽

Hao Yu ◽

Yujie Tan ◽

Hongmei Tan ◽

...

Keyword(s):

Dynamic Characteristics ◽

Structural Parameters ◽

Load Test ◽

Torsional Stiffness ◽

Seismic Stability ◽

Dead Load ◽

Cable Stayed Bridge ◽

Subspace Iteration ◽

Steel Truss ◽

Steel Truss Girder

The dynamic characteristics are closely linked to the seismic stability and wind-resistant of the bridge. But different bridge types have different dynamic characteristics. In order to study the dynamic characteristics of a double-pylon cable-stayed bridge with a single-cable plane and steel truss girder whose main span is the longest in the world, the dynamic load test was done, and the finite element and the subspace iteration methods were used to analyze the vibration mode of the bridge. The influence of different structural parameters on the dynamic characteristics of the bridge was analyzed. The changed structural parameters are cable layout, stiffness of steel truss girder, stiffness of stayed cables, stiffness of pylons, the concentration of dead load, number and location of auxiliary piers, and structural system. The results show that the bending and torsion resistance of the double-pylon cable-stayed bridge with a single-cable plane and steel truss girder is weak. The torsional stiffness of the cable-stayed bridge with a double-cable plane is stronger than that of the cable-stayed bridge with a single-cable plane. The seismic stability and wind-resistant of the bridge can be improved by using light dead load, improving the stiffness of pylon and girder, and adding auxiliary piers scientifically. However, the change of cable stiffness has a complex influence on the dynamic characteristics of the bridge. The conclusion can offer references for the construction, maintenance, and design of the same type of bridges.

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Load Test of Kao-Ping-Hsi Cable Stayed Bridge

IABSE Symposium Report ◽

10.2749/222137801796350293 ◽

2001 ◽

Vol 84 (7) ◽

pp. 65-72

Author(s):

Chun-Ray Chen ◽

Shi-Lon Dong ◽

I-Kuang Fang ◽

Chung-Ching Chang ◽

Cheing-Chou Chen

Keyword(s):

Load Test ◽

Cable Stayed Bridge

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Structural Ageing of a Cable-Stayed Bridge During Load-Test: The Overall Effect Monitored by Acoustic Emission

Acoustic Emission - Research and Applications ◽

10.5772/54840 ◽

2013 ◽

Author(s):

Giovanni P. ◽

Giuliano Ventrice ◽

Sebastiano Pinori ◽

Genesio Alessandrini ◽

Francesco Bianchi

Keyword(s):

Acoustic Emission ◽

Load Test ◽

Cable Stayed Bridge

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Field Static Load Test on Kao-Ping-Hsi Cable-Stayed Bridge

Journal of Bridge Engineering ◽

10.1061/(asce)1084-0702(2004)9:6(531) ◽

2004 ◽

Vol 9 (6) ◽

pp. 531-540 ◽

Cited By ~ 10

Author(s):

I-Kuang Fang ◽

Chun-Ray Chen ◽

I-Shang Chang

Keyword(s):

Static Load ◽

Load Test ◽

Static Load Test ◽

Cable Stayed Bridge ◽

Field Static

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EVALUATION OF THE EFFECT OF EXTERNAL PRESTRESSED STEEL STRANDS ON CABLE-STAYED BRIDGES BASED ON FINITE ELEMENT ANALYSIS AND STATIC TEST

Stavební obzor - Civil Engineering Journal ◽

10.14311/cej.2021.01.0024 ◽

2021 ◽

Vol 30 (1) ◽

Author(s):

Chunwei Li ◽

Haitao Yu ◽

Dongzhe Jia ◽

Quansheng Sun

Keyword(s):

Reinforced Concrete ◽

Horizontal Displacement ◽

Load Test ◽

Beam Deflection ◽

Main Beam ◽

Damage State ◽

Element Analysis ◽

Static Test ◽

Cable Stayed Bridge ◽

Prestressed Reinforcement

This article relies on the reinforcement project of the Mulinghe cable-stayed bridge to explore the changes in the mechanical properties of the reinforced concrete cable-stayed bridge before and after reinforcement. The bridge has large cable spacing, large internal force of a single cable, and the main beam is mainly Reinforced Concrete. Therefore, structural calculation, disease analysis, and damage state simulation are carried out. Afterwards, the bridge's commonly used reinforcement methods were compared, and suitable reinforcement schemes were selected. After the reinforcement, the field test was carried out on the cable-stayed bridge, the main beam deflection, the strain of the main beam and the main tower, and the increase in the cable force of the cable- stayed were analyzed. The results show that external prestressed reinforcement is the best way, which can significantly reduce the vertical displacement of the main beam and the horizontal displacement of the main tower, and also improve the stress on the upper and lower edges of the main beam. After the external prestressed reinforcement, the ratio of the observed value to the observed value in the filed load test of the cable-stayed bridge's decreased significantly. It is up to 31% increase in bending capacity of main beams and up to 24% increase in stiffness. This article is instructive for the reinforcement of the early-built sparse-cable reinforced concrete cable-stayed bridge, while also expanding the scope of implementation of external prestressed reinforcement technology.

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