scholarly journals Analysis for Dynamic and Static Load Test of Prestressed Concrete Simply Supported Bridge

2020 ◽  
Vol 7 (1) ◽  
pp. 47-51
Author(s):  
Shengyu Qian
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Load Test ◽  
Static Load Test ◽  
Simply Supported

Technical Research on Monitor of SLMSS Grider Fabrication for the Passengers Dedicated Line

2011 ◽  
Vol 90-93 ◽  
pp. 1807-1811
Author(s):  
Jin Yi ◽  
Guo Jing He
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Load Test ◽  
Beam Deflection ◽  
Static Load Test ◽  
Deflection Curve ◽  
Box Girders ◽  
Mobile Form ◽  
Technical Research ◽  
Simply Supported

The yanmiao bridges are used in the 32m prestressed concrete simply-supported box girders on the wuhan-guangzhou passengers dedicated line,they are constucted in the mobile form.To ensure the constuction safety and the accurated line,static load test and monitor for the mobile form were did.The result of test and monitor showed that in the state of work the different parts’force of the mobile form is in the elastic range. The entire beam deflection curve linear is reasonable, they provided the test reference for the the setting of the pre-camber and the control of the box girder’s height.

The Modification to the FEM Model of the Prestressed Concrete Beam with the Combination of the Data of Static and Dynamic Test

2014 ◽  
Vol 707 ◽  
pp. 401-405
Author(s):  
Tao He ◽  
Chong Ji Zhao
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Dynamic Test ◽  
Load Test ◽  
State Variables ◽  
Static Load Test ◽  
Fem Model ◽  
Modified Model ◽  
Finite Element Software ◽  
T Beam

Using the finite element software ANSYS to establish the model of prestressed concrete T beam .With the combination of dynamic and static load test data, the objective function was constructed by taking the vertical deflection of the static load test and the top five vertical natural frequency of dynamic test as state variables. The results revealed that,after being modified ,the error between the calculation value and the testal results of the model was converged in a reasonable error range.In addition ,The modified model could be used in the assessment of bridge structure performance,and it shows the practical application value.

Experimental Static Load Test of Prestressed Concrete Slab-on-Ground Model

2017 ◽  
Vol 865 ◽  
pp. 320-324
Author(s):  
Petr Mynarcik ◽  
Jiri Koktan
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Flood Hazard ◽  
Concrete Slab ◽  
Load Test ◽  
Concrete Column ◽  
Static Load Test ◽  
Model Situation ◽  
Research Activities ◽  
Series Of Experiments

This experimental static load test is part of research activities scoped on problematics with involved foundation conditions. Especially for areas with influence of undermining or flood hazard. Concept of experiment was designed like a model situation of interaction between concrete column, concrete slab-on-ground and subsoil. During static load process were measured deformations, tensions inside the experimental model and geotechnical values on contact surface of concrete slab-on-ground and subsoil. These data were processed and presented in this article. The described experimental static load test is part of a series of experiments focusing on the problematics of concrete constructions in interaction with subsoil and was realized at the Faculty of Civil Engineering, VŠB –Technical University of Ostrava.

Bridge Structure Performance Evaluation Based on Dynamic Load Test

2012 ◽  
Vol 238 ◽  
pp. 694-696 ◽  
Author(s):  
Yan Zeng
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Load Test ◽  
Bridge Structure ◽  
Static Load Test ◽  
Box Girder ◽  
Dynamic Load Test ◽  
Actual Service ◽  
Calculation Results ◽  
Service State

Static load test was carried out on Hengshui interchange ramp bridge of Lin-Chang expressway. The superstructure of the bridge is cast-in-place prestressed concrete continuous box-girder. The actual service state of the bridge is analyzed by the comparison of experimental and calculation results. The study provides the initial technical files and the basis of acceptance, operation, maintenance and management for the bridge.

Study on Vibration-Based Detection Methods for Determining the Elastic Modulus of Glulam Beams

2016 ◽  
Vol 847 ◽  
pp. 463-468
Author(s):  
Jie Jun Wang ◽  
Yan Ge Liu ◽  
Di Yang Xia
Keyword(s):  
Elastic Modulus ◽  
Static Load ◽  
Detection Method ◽  
Load Test ◽  
Test Method ◽  
Detection Methods ◽  
Vibration Test ◽  
Static Load Test ◽  
Simply Supported ◽  
Static Modulus

This paper presents the vibration test method of the elastic modulus of glulam beams. Under the condition of simply supported, the elastic modulus of glulam beams is tested based on the vibration method. Compared with the static modulus tested by static load test and the natural frequency tested by finite element method, vibration-based detection method is proved to be feasible and accurate in measuring the elastic modulus of glued laminated beams.

The Static Load Test Analysis of One Bonded Prestressed Concrete Box Beam

2014 ◽  
Vol 638-640 ◽  
pp. 1002-1007
Author(s):  
Xian Rong ◽  
Yu Ting Zhao ◽  
Qing Wen Zhang
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Residual Deformation ◽  
Load Test ◽  
Static Load Test ◽  
Test Beam ◽  
Test Analysis ◽  
Stress Cracking ◽  
Box Beam ◽  
Strain Stress

This paper selected one bonded prestressed concrete box beam which was No.33-2 in the left picture of shahe bridge of one highway project as a test beam. We tested the deformation (deflection, residual deformation), strain(stress), cracking condition and cracking width under three cycles loading at the middle of span through the static load test. We compared and analyzed the tested values with the theoretical calculating values, then we get the security of the bonded prestressed concrete box beam can be guaranteed.

Study on static load test of simply supported hollow slab bridge flexural strengthened with polyurethane–cement composite

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chunwei Li ◽  
Quansheng Sun ◽  
Yancheng Liu
Keyword(s):  
Prestressed Concrete ◽  
Structural Integrity ◽  
Engineering Application ◽  
Cement Composite ◽  
Load Test ◽  
Static Load Test ◽  
Content Type ◽  
Static Test ◽  
Simply Supported ◽  
Bending Capacity

PurposeAs the service time of bridges increases, the degradation of bending capacity, the lack of safety reserves and the decrease in bridge reliability are common in early built bridges. Due to the defective lateral hinge joints, hollow slab bridges are prone to cracking of hinge joint between plates, transverse connection failure and stress of single plates under the action of long-term overload and repeated load. These phenomena seriously affect the bending capacity of the hollow slab bridge. This paper aims to describe a new method of simply supported hollow slab bridge reinforcement called polyurethane–cement (PUC) composite flexural reinforcement.Design/methodology/approachThis paper first studies the preparation and tensile and compressive properties of PUC composite materials. Then, relying on the actual bridge strengthening project, the 5 × 20 m prestressed concrete simply supported hollow slab was reinforced with PUC composites with a thickness of 3 cm within 18 m of the beam bottom. Finally, the load test was used to compare the performance of the bridge before and after the strengthening.FindingsResults showed that PUC has high compressive and tensile strengths of 72 and 46 MPa. The static test revealed that the measured values and verification coefficients of the measured points were reduced compared with those before strengthening, the deflection and strain were reduced by more than 15%, the measured section stiffness was improved by approximately 20%. After the strengthening, the lateral connection of the bridge, the strength and rigidity of the structure and the structural integrity and safety reserves were all significantly improved. The application of PUC to the flexural strengthening of the bridge structure has a significant effect.Originality/valueAs a new type of material, PUC composite is light, remarkable and has good performance. When used in the bending strengthening of bridge structures, this material can improve the strength, rigidity, safety reserve and bending capacity of bridges, thus demonstrating its good engineering application prospect.

scholarly journals Research on evaluation method of bearing capacity of existing bridge based on static load test

2021 ◽  
Vol 233 ◽  
pp. 03015
Author(s):  
Qingcheng Yang ◽  
Yufeng Ning ◽  
Weiwei Sun ◽  
Shunchao Cheng
Keyword(s):  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Evaluation Method ◽  
Static Load ◽  
Load Test ◽  
Static Load Test ◽  
Measuring Point ◽  
Limit Value ◽  
Rigid Frame ◽  
Standard Limit

The author carried out static load test research on a prestressed concrete rigid frame bridge. Under the action of static load, the most unfavorable section JM3 on the beam body was measured. The stress and deflection values at each measuring point were measured. The results show that the check coefficient of stress and deflection at each measuring point of the box girder does not exceed the standard limit value 1, the relative residual strain or deformation at each measuring point does not exceed the standard limit value 20%, and the overall bearing capacity of the bridge structure meets the normal use requirements of the design load (highway-I class).

Experimental Analysis and Performance Evaluation of Fu Feng Highway Prestressed Concrete Bridge after Strengthening in China

2011 ◽  
Vol 189-193 ◽  
pp. 2346-2352
Author(s):  
Ali Fadhil Naser ◽  
Zong Lin Wang
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Load Test ◽  
Concrete Bridge ◽  
Bridge Structure ◽  
Structural Members ◽  
Static Load Test ◽  
Box Girders ◽  
Transverse Beam ◽  
Prestressed Concrete Bridge

Fu Feng highway prestressed concrete bridge is located in Changchun City which is the capital and largest city of Jilin province and it located in the northeast of China. The strengthening of the bridge structural members can be attempted by replacing poor quality or defective materials by better quality materials, attaching additional load-bearing materials, and re-distribution of the loading actions through imposed deformation on the structure system. The objectives of this study are to explain the strengthening process of damaged structural members of Fu Feng bridge, and to evaluate the performance of the bridge structure by adopting static load test. The strengthening process of damaged structural members includes three stages. These stages include the strengthening of box girders floor by casting of 10cm of reinforced concrete in the floor of box girder within the location of positive bending moment in the mid-span and edge span, the strengthening of box girders web by pasting steel plates in the inside of the right and left of box girders, and the strengthening of the transverse beam of piers No. 18 and No. 19 by using carbon fiber sheet. The results of static load test show that the values of testing coefficient ( ) of stress range from 0.83 to 0.92 are less than allowable value 1.05. Therefore, these values satisfy the allowable value of standard, indicating that the structural member has a certain strength reserve and the working state of the bridge structure in good state. the ratio between the measured and theoretical deflection is 1.41 and 1.68 for condition 3 more than allowable value 0.8, indicating that the state of stiffness is not good and there are still a serious shortage in stiffness of structure. Therefore, this study recommended that the bridge structural members need to re-strengthen by using other effective technical and materials to increase the stiffness of structural members of the bridge.

Single Beam Load Test of Continuous Beam

2014 ◽  
Vol 578-579 ◽  
pp. 801-804
Author(s):  
Ya Xun Yang ◽  
Wei Ya Fan
Keyword(s):  
Prestressed Concrete ◽  
Static Load ◽  
Load Test ◽  
Static Load Test ◽  
Box Girder ◽  
Single Beam ◽  
Control Section ◽  
Design Requirements ◽  
Girder Bridge ◽  
Actual Control

GengYuHe bridge was a prestressed concrete continuous box girder bridge,based on the static load test of single beam bridges compared with theoretical calculation value,check whether the actual control section stress of the bridge are in conformity with the design requirements,and give advice.

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