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.

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 Study on Strain Performance of Tensile Reinforcement under Fatigue Loads

2013 ◽  
Vol 351-352 ◽  
pp. 1625-1628
Author(s):  
Xian Xi Tang ◽  
Jin Bao Liang ◽  
Yan Peng Zhu ◽  
Xian Zhou Tang ◽  
Yue Xu
Keyword(s):  
Experimental Study ◽  
Static Load ◽  
Concrete Slab ◽  
Strain Curve ◽  
Load Test ◽  
Static Load Test ◽  
Reinforced Concrete Slab ◽  
Linear Change ◽  
After Effect ◽  
Fatigue Loads

As for the study on the strain performance of tensile reinforcement under the fatigue loads with amplitude of certain values, two groups of reinforced concrete slab bridge specimen were made. The fatigue test was carried out on one group of specimen, and the corresponding static load test was carried out on another group of specimen, the experimental study on the strain performance of tensile reinforcement was carried on bottom of the mid span of slabs. The results of the study shown that, under the fatigue loads at a certain amplitude, the strain performance of the tensile reinforcement tend to be stable with the increase of number of fatigue cycle, the strain value showed certain linear relationship with static load applied. When the fatigue amplitude increased, the change rule of strain with static load value applied was approximately linear, but the strain value increased more than the fatigue amplitude less under the same static load. It could be seen through the comparison of load - strain curve of the static load specimen, after effect of compressive fatigue with certain amplitude, the strain change with load applied was close to linear change, which has great relationship with the effect on concrete and reinforcement plastic deformation by fatigue load. The test results had the vital significance of further research on reinforcement performance under the action of fatigue loads.

The Subsidence Analysis of Experimental Post-Tensioned Concrete Slab Model in the Course of the Static Load Test

2015 ◽  
Vol 744-746 ◽  
pp. 1556-1559
Author(s):  
Petr Mynarcik
Keyword(s):  
Large Scale ◽  
Static Load ◽  
Concrete Slab ◽  
Base Plate ◽  
Load Test ◽  
Slab Model ◽  
Static Load Test ◽  
Research Activity ◽  
Load Effect ◽  
Post Tensioned

This article presenting results of subsidence measurement on experimental post-tensioned concrete slab model during static load test. This subsidence measurement was realized on the large scale concrete slab model and brought important data for computer modeling by FEM (finite element method). The experiment simulated the load effect of the base plate of heavy rack. In the course of the static load test subsidence was measured by set of potentiometric gauges at the particular points in real time. The experiment continue on research activity focused on problematic of interaction between concrete structures and subsoil and was realized at the Faculty of Civil Engineering, VSB – Technical University of Ostrava, Czech Republic.

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.

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.

Experimental Study on the Development Regularity of Slab Concrete Cracks under Fatigue Loads

2013 ◽  
Vol 405-408 ◽  
pp. 1091-1095
Author(s):  
Xian Xi Tang ◽  
Jin Bao Liang ◽  
Xian Zhou Tang ◽  
Yue Xu
Keyword(s):  
Experimental Study ◽  
Static Load ◽  
Concrete Slab ◽  
Development Trend ◽  
Concrete Bridges ◽  
Load Test ◽  
Static Load Test ◽  
Reinforced Concrete Slab ◽  
Fatigue Loads ◽  
The Development Trend

As for the study on the development regularity of slab concrete cracks under the fatigue loads with amplitude of certain values, two groups of reinforced concrete slab bridge specimen were made. The fatigue test was carried out on one group of specimen, and the corresponding static load test was carried out on another group of specimen, the experimental study on the development regularity of concrete cracks at bottom of slab were carried out. The results of the study shown that, under the fatigue loads at a certain amplitude, the development trend of cracks caused by loading at the bottom of slabs changed more under fatigue loads. The reasons caused the changes of development regularity of concrete cracks were analyzed. The experimental results has the vital significance of further research on the development regularity of concrete bridges under the action of fatigue loads.

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.

scholarly journals THERMO-MECHANICAL MODEL FOR CONCRETE PAVEMENT

2021 ◽  
Vol 30 ◽  
pp. 121-125
Author(s):  
Jakub Veselý ◽  
Vít Šmilauer
Keyword(s):  
Mechanical Model ◽  
Static Load ◽  
Transfer Problem ◽  
Concrete Slab ◽  
Concrete Pavement ◽  
Load Test ◽  
Static Load Test ◽  
Interface Elements ◽  
The Difference ◽  
Field Static

This paper describes a numerical thermo-mechanical model for concrete pavement, implemented in OOFEM software. The thermal part is a heat transfer problem with appropriate initial and boundary conditions (sun irradiation, radiation and convection), calibrated from experimental data. Heat release from cement hydration is also included, calibrated for commonly used cements to demonstrate the difference that can be achieved with the binder selection. The mechanical part of the problem is composed of a 3D elastic concrete slab, subsoil Winkler-Pasternak elements and 1D interface elements, allowing separation in tension. The Winkler-Pasternak constants C1 and C2 were firstly determined from TP170 document and refined later from static load tests on the highway. The model validates well temperature field, static load test and provide several useful insight such as feasible time for summer casting, stress/strain fields and slab separation from the base.

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).

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