Deflection Test on CFST Arch Bridge with CFRP Slings

2011 ◽  
Vol 295-297 ◽  
pp. 1079-1087
Author(s):  
Guo Hui Cao ◽  
Zhen Yu Xie ◽  
Ming Cai Wen ◽  
Ran He
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Arch Bridge ◽  
Bridge Model ◽  
Cfst Arch Bridge ◽  
Internal Forces ◽  
East And West ◽  
Deflection Test

The ultimate bearing capacity test is carried on CFST arch bridge model with CFRP slings, and the deflection of tie-beams, CFST arch, crossbeams, decks is also tested. Studies have shown that before the sliping of 4# CFRP sling, the deflection growth of east and west tie-beam, east and west arch both has good symmetry. The deflection growth of crossbeams and decks also has good symmetry, but after the sliping of 4# CFRP sling(located at the middle of west tie-beam), the structural internal forces redistribution appeared. The deflection of west tie-beam increased suddenly, and the mid-span deflection of west tie-beam is larger than that of east tie-beam by 14.6%. The mid-span deflection of east arch is larger than that of west arch by 9.9%. The deflection of crossbeam at 3L/8 and L/4 sections are respectively larger than those of crossbeam at 5L/8 and 3L/4 sections by 13.8% and 5.3%, The deflection of 3#, 2# and 1# decks are respectively larger than those of 4#, 5# and 6# decks by 7.8%, 13.2% and 17.1%. After the snapping of 10# CFRP sling(located at 3L/8 section of east tie-beam), the structural internal forces would appear redistribution. The deflection of east tie-beam would increase suddenly. The mid-span deflection of east tie-beam is larger than that of west tie-beam by 31.7%, and the mid-span deflection of east arch is larger than that of west arch by 21.3%. The deflection of crossbeam at 3L/8 and L/4 sections are respectively larger than those of 5L/8 and 3L/4 sections by 24.7% and 22.5%. The deflection of 3#, 2# and 1# decks are respectively larger than those of 4#, 5# and 6# decks by 16.2%, 24.5% and 28.6%.

The Study on Bearing Capacity Influence for the Steel Tube Deformation in CFST Arch Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2236-2239 ◽  
Author(s):  
De Rong Zeng ◽  
Tie Jun Wang
Keyword(s):  
Bearing Capacity ◽  
Critical Stress ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Reduction Factor ◽  
Analysis Software ◽  
Element Analysis ◽  
Arch Bridge ◽  
Cfst Arch Bridge ◽  
Before And After

The theoretical formulas of the ultimate bearing capacity and critical stress of the deformed steel tube in a CFST arch bridge are gotten by the local section steel tube analysis and the elastic buckling analysis of steel tube, At the same time, the ultimate bearing capacity and critical stress of the deformed steel tube are computed by using ANSYS finite element analysis software and compared, which verifies the theoretical formulas are correctness and feasibility. Finally, a reduction factor formula of the ultimate bearing capacity of the tube before and after deformation is gotten; it directly reflected the reduction level of the ultimate bearing capacity of the deformed steel tube.

Experimental Research on Special-Shaped CFST Arch Bridge Model

2011 ◽  
Vol 243-249 ◽  
pp. 1835-1841
Author(s):  
Da Peng Gu ◽  
Yan Jiang Chen ◽  
Wei Ming Yan ◽  
Yong Li
Keyword(s):  
Experimental Research ◽  
Model Test ◽  
Static Model ◽  
Bridge Engineering ◽  
Bridge Structure ◽  
Arch Bridge ◽  
Bridge Model ◽  
Cfst Arch Bridge ◽  
National Road ◽  
Main Bridge

The main bridge structure of the bridge engineering cross Yitong river, on the 102 national road, is a three-Span flying swallow type special-shaped CSFT arch bridge. This paper introduces the design, process and results of the static model test of the CFST arch bridge.

Ultimate Bearing Capacity Analysis of Concrete Filled Steel Tubular Arch Considering the Initial Defects’ Influence

2012 ◽  
Vol 446-449 ◽  
pp. 1248-1251 ◽  
Author(s):  
Jun Liang Hu ◽  
Quan Sheng Yan ◽  
Xiao Lin Yu ◽  
Heng Bin Zheng
Keyword(s):  
Heat Treatment ◽  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Capacity Analysis ◽  
Continuous Beam ◽  
Axis Deviation ◽  
Construction Process ◽  
Continuous Beam Bridge ◽  
Cfst Arch Bridge ◽  
Beam Bridge

In the CFST arch bridge construction process, for the reasons of arch axis deviation as prefabricated or constructed, the bearing capacity of arch-rib decreased. This paper considers material and geometric non-linear double factors, calculates the arch-rib ultimate bearing capacity of a CFST arch/continuous beam bridge with defects of arch axis deviation and steel yield stress decrease because of heat treatment, obtain the influence of defects to arch bearing capacity.

Seismic Testing of a Long-Span Concrete Filled Steel Tubular Arch Bridge

2010 ◽  
Vol 456 ◽  
pp. 89-102 ◽  
Author(s):  
Wei Ming Yan ◽  
Yong Li ◽  
Yan Jiang Chen
Keyword(s):  
Dynamic Performance ◽  
Internal Force ◽  
Shaking Table ◽  
Structural System ◽  
Arch Bridge ◽  
Seismic Testing ◽  
Response Characteristics ◽  
Long Span ◽  
Bridge Model ◽  
Cfst Arch Bridge

Long-span bridges are always a multi-support structural system, and seismic ground motion can vary significantly over distances comparable to the length of such kind of bridges, so it’s difficult to carry out shaking table tests because of the restriction of the dimension and amount of shaking tables. This paper discusses the multiple sub-table cordwood system is used to conduct a study on the seismic testing of a three-span irregular Concrete filled steel tubular (CFST) arch bridge with the objective of investigating the dynamic performance of the bridge under spatial earthquake motions. The development and testing of the bridge model and selected experimental results are discussed then. The seismic response and response characteristics of acceleration, displacement, internal force, and strain of the structure under earthquake excitations are gained, which can provide test data and basis to evaluate the seismic performance of this CFST arch bridge or other similar structural system design.

Autoexcitation-Based Accelerometer Array for Interface Separation Detection of Concrete-Filled Steel Tubular Arch Bridge

2014 ◽  
Vol 578-579 ◽  
pp. 995-999 ◽  
Author(s):  
Sheng Shan Pan ◽  
Xue Feng Zhao ◽  
Zhe Zhang
Keyword(s):  
Surface Wave ◽  
Bearing Capacity ◽  
Efficient Method ◽  
Vibration Signal ◽  
Steel Tube ◽  
Engineering Problem ◽  
Test Method ◽  
Vibration Test ◽  
Arch Bridge ◽  
Cfst Arch Bridge

The separation between the filled-concrete and the steel tube would reduce tremendously the bearing capacity of the concrete-filled steel tubular (CFST) arch bridge. However, there is no efficient method to monitor and detect the separation so far, which is a great engineering problem we have to solve. Therefore, this paper firstly proposes a vibration test method aiming at the local modal of the steel tube. Distributed accelerometer array deployed along the tube is used to acquire the vibration signal induced by quantitative excitation via telecontrol. Changes in frequency and amplitude of the steel tube are selected as parameters for the separation detection based on the theory of surface wave transmission. This method can satisfy the demand of the real-time monitoring of interface separation of the CFST arch bridge.

A Method for Seismic Capacity Evaluation of CFST Arch Bridges

2011 ◽  
Vol 268-270 ◽  
pp. 377-382
Author(s):  
Kai Zhong Xie ◽  
Le Qin Qin ◽  
Wen Gao Lv
Keyword(s):  
Failure Modes ◽  
Steel Tube ◽  
Ground Movement ◽  
Seismic Capacity ◽  
Arch Bridge ◽  
Capacity Evaluation ◽  
Cfst Arch Bridge ◽  
Internal Forces ◽  
Arch Bridges ◽  
Capability Evaluation

Based on strength and ductility, the seismic capabilities of the chords of arch ribs, web members, horizontal integrations, suspenders and beams of suspenders of concrete filled steel tube (CFST) arch bridges are studied, then the seismic capability of the bridge is obtained. Firstly, the internal forces of the members are calculated respectively by finite element under the actions of gravity representative value and small earthquakes (0.05g). Then the ultimate bearing capacities, the ratio of ductility and the reduction coefficients of earthquake are obtained according to the failure modes. Finally, yield accelerations of ground movement are multiplied by the reduction coefficients of earthquake, which the resistance seismic capabilities of the members Ac are obtained. The seismic capability of bridge is the minimum Ac. Taking Nanning Yonghe Bridge that is a 346m CFST arch bridge as example, the seismic capability is evaluated that the bridge can resisted the earthquake which the acceleration of ground movement is respectively 0.677g. The results show that the method of seismic capability evaluation is a feasible and efficient method for seismic capability evaluation of CFST arch bridge.

Ultimate Bearing Capacity Analysis of Long-Span Continuous Stone Arch Bridge

2011 ◽  
Vol 71-78 ◽  
pp. 3800-3805
Author(s):  
Da Lin Hu ◽  
Kai Jiang ◽  
Qi Xin Sun ◽  
Lin Han
Keyword(s):  
Bearing Capacity ◽  
Safety Assessment ◽  
Ultimate Bearing Capacity ◽  
Failure Characteristics ◽  
Arch Bridge ◽  
The Past ◽  
Long Span ◽  
Arch Bridges ◽  
Mechanical Performances ◽  
Main Arch

In the past 50 years, many long-span continuous stone arch bridges have been built in China. Analysis of mechanical performances and load capacities of long-span continuous stone arch bridges has important significances for the safety assessment of the similar bridges. 3D elastoplastic finite element method is employed to analyze ultimate bearing capacity of a three-span arch bridge with sandstone masonry in this paper. The characteristics of structural geometric and material nonlinearities and cracking and crushing of the masonry are taken into account. Compared with single-span arch bridge, both the coaction of spandrel structure and main arch and the influence of loading arrangements on ultimate bearing capacity is analyzed. The failure characteristics of the structure under the ultimate load are also introduced. The analysis results and conclusions can be referenced for the safety assessment of similar bridges.

Simulation and Analysis for Externally Prestressed Concrete Bridge Based on ANSYS

2011 ◽  
Vol 243-249 ◽  
pp. 1737-1742 ◽  
Author(s):  
Ke Chen ◽  
Jian Yong Song ◽  
Shuo Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Local Stress ◽  
Ultimate Bearing Capacity ◽  
Concrete Bridge ◽  
Element Analysis ◽  
Bridge Model ◽  
Prestressed Concrete Bridge

The externally prestressed bridge finite element analysis module redeveloped based on ANSYS software is introduced，realizing finite element analysis method for externally prestressed concrete bridge. It is able to build the externally prestressed bridge finite element model, combined with Solid65 and Solid45 simulated concrete, and Link8 or Link10 simulated prestressed tendon. It is also able to bring material and geometric nonlinear effects into the analysis, for analyzing ultimate bearing capacity and local stress characterization of the externally prestressed structure. A bridge model is generated as an example for verifying the application of the module. Based on it, the model then is equipped with different allocation arrangements of internal and external tendons to analyze the mechanical characteristics of externally prestressed concrete bridge. Research is conducted for the effect on ultimate bearing capacity by allocation arrangement of tendons, and providing design suggestion and theoretic basis.

scholarly journals Failure Modes Analysis of Stone Arch Bridges

2015 ◽  
Vol 9 (1) ◽  
pp. 442-449
Author(s):  
Song Jun ◽  
Wang Fumin ◽  
Shi Kang
Keyword(s):  
Bearing Capacity ◽  
Failure Modes ◽  
Ultimate Bearing Capacity ◽  
Scale Model ◽  
Arch Bridge ◽  
Loading Process ◽  
Bridge Safety ◽  
Destruction Mechanism ◽  
Arch Bar ◽  
Arch Bridges

A destruction test based on the bridge safety appraisal is one way to verify the failure law of an actual bridge. In this paper, a stone arch bridge in a 1:10 scale model and with a span of 60 m (namely, an arch bar of the same length as the object of test) has been tested, methods of its whole test and loading process introduced, and ultimate bearing capacity, deflection and development rules of cracks in the loading process figured out. With the clarification of destruction mechanism, the ultimate forms of disease and remaining height of section have been acquired and, finally, the destruction theory of stone arch bridges has been verified and optimized.

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