scholarly journals ALTERNATIF UJI BEBAN PADA STRUKTUR (STUDI KASUS : JEMBATAN BAJA)

2021 ◽  
Vol 5 (1) ◽  
pp. 27
Author(s):  
Chairul Soleh ◽  
Josia Irwan Rastandi
Keyword(s):  
Natural Frequency ◽  
Dynamic Load ◽  
Static Load ◽  
Natural Frequencies ◽  
Load Test ◽  
Vibration Test ◽  
Steel Bridge ◽  
Bridge Structure ◽  
Static Load Test ◽  
Dynamic Load Test

The most common structural load test that has been widely used is the static load test. An alternative to the structural load test is dynamic load test. Dynamic testing is a test carried out to determine level of structural stiffness or structural elements stiffness in the form of natural frequencies, while the static load test is intended to obtain responses of static loading from the structure in the form of deflection. The discussion will emphasize the correlation between static load test and dynamic load test. To correlate the static load test with the vibration test, a reference or value that comes from modeling or theoretical analysis is needed. Structural modeling is carried out to obtain the theoretical natural frequency and the theoretical deflection which will then be compared with the natural frequency of the vibration test (dynamic). If the frequency of the test results and the theoretical frequency are compared to the theoretical deflection, the prediction of the test deflection will be obtained. The correlation between the predicted deflection of the test and deflection of the static load test is quite close with a difference of less than 12%. Judging from the above correlation, periodic inspections of the tested structures can be considered for vibration testing only. The types of structures reviewed are simple span steel bridge structure, simple span + link slab steel bridge structure and continuous span steel bridge structure. Keywords: modeling; natural frequencies; vibration testing; static load test  AbstrakUji beban struktur yang umum dan sudah banyak dilakukan adalah uji beban statik. Alternatif lain dari uji beban adalah dengan melakukan pengujian vibrasi (dinamik) pada struktur. Pengujian vibrasi (dinamik) dilakukan untuk mengetahui tingkat kekakuan struktur atau elemen struktur berupa frekuensi alami, sedangkan uji beban statik dimaksudkan untuk mendapatkan respons hasil pembebanan statik dari struktur berupa lendutan. Pembahasan akan menekankan kepada korelasi antara uji beban statik dan uji beban vibrasi (dinamik). Untuk mengkorelasikan pengujian beban statik terhadap pengujian vibrasi (dinamik) diperlukan suatu acuan atau nilai yang berasal dari analisa pemodelan atau teoritis. Pemodelan struktur dilakukan untuk mendapatkan frekuensi alami secara teoritis dan lendutan teoritis yang kemudian akan dibandingkan dengan frekuensi alami hasil uji vibrasi (dinamik).  Jika frekuensi hasil uji dan frekuensi teoritis dibandingkan terhadap lendutan teoritis maka akan didapatkan prediksi lendutan uji. Hasil korelasi antara prediksi lendutan uji terhadap lendutan uji beban statik cukup mendekati dengan perbedaan kurang dari 12%. Dilihat dari korelasi diatas, maka untuk pemeriksaan berkala pada struktur yang telah diuji dapat dipertimbangkan untuk dilakukan pengujian vibrasi saja. Jenis struktur yang ditinjau adalah struktur jembatan baja simple span, simple span + link slab dan continuous span.

Study on Detection Method of Bridge Structure Based on Quasi-Static Test

2014 ◽  
Vol 501-504 ◽  
pp. 1148-1151
Author(s):  
Chun Heng Feng ◽  
Yan Gao ◽  
Xi Sha Jin ◽  
Xing Na Shi
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Load ◽  
Static Load ◽  
Element Model ◽  
Load Test ◽  
Bridge Structure ◽  
Static Load Test ◽  
Static Test ◽  
Dynamic Load Test

Currently the bridge structure detections are mainly based on static load test and dynamic load test. The static load test has shortcomings of less test data, long time-consumption and high cost. However, the dynamic load test has the advantages of quick and convenient, its related technologies and theories are still not mature enough. To solve this problem, the detection of bridge structure based on quasi-static test is proposed in this paper. Quasi-static load is applied on the structure by moving the standard load vehicle slowly. Then create the structural finite element model and modify the model according to the measured data to make it consistent with the actual structure. The bridge actual structural mechanical properties can be acquired by conducting load test on the optimized structural finite element model. By doing this, the bridge safety could be evaluated quickly.

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

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.

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.

Damage Monitoring and Field Analysis of Dynamic Responses of Ha Shuang Prestressed Concrete Box Girder Oblique Bridge before Strengthening

2011 ◽  
Vol 255-260 ◽  
pp. 1102-1106
Author(s):  
Ali Fadhil Naser ◽  
Zong Lin Wang
Keyword(s):  
Natural Frequency ◽  
Dynamic Load ◽  
Prestressed Concrete ◽  
Load Test ◽  
Dynamic Responses ◽  
Bridge Structure ◽  
Box Girder ◽  
Dynamic Load Test ◽  
Concrete Box Girder ◽  
The Web

Ha Shuang Bridge is located in Harbin city within Heilongjiang province in the east north of China. The purposes of this study are to monitor the damage in structural members of Ha Shuang prestressed concrete box girder oblique bridge before strengthening and to evaluate the dynamic performance of the bridge structure by adopting dynamic load test. Monitoring process of damage of the bridge structure shows that the web of box girder in the quarter of the second span (about 10.5m from the pier) suffers from serious shear cracks. These cracks extend from the top to lower flange of box girder. The width of cracks rang from 0.5mm to 2mm and the angle is 45 degree. There are 6 bending cracks. The spacing between these cracks rang from 20cm to 30cm and the width is 035mm. In the span No. 3 near the pier, the web of box girder appears 12 diagonal cracks have width rang from 0.1mm to 0.12 mm. The results of dynamic load test analysis show that the values of measured vertical natural frequency is w1 = 3.616Hz and horizontal natural frequency w2 = 4.492Hz less than the values of theoretical natural frequency which is 3.863Hz and 4.848Hz, indicating that the actual stiffness of the bridge structure is less than the theoretical stiffness. Therefore the dynamic working state of bridge structure is not good. Therefore the working state of bridge is not good and it need to repair and strengthening.

COMPARISON BETWEEN STATIC AND DYNAMIC LOAD TEST APPLIED TO A STEEL-CONCRETE MIXED BRIDGE STRUCTURE

2017 ◽  
Author(s):  
Maíra Rolla Campos ◽  
Clarissa Rafaela Pinto ◽  
Cláudio José Martins
Keyword(s):  
Dynamic Load ◽  
Load Test ◽  
Bridge Structure ◽  
Dynamic Load Test

Static Load Test and Modal Analysis of Qingshui River Bridge

2012 ◽  
Vol 588-589 ◽  
pp. 166-169
Author(s):  
Jian Rong Yang ◽  
Zuo Xiong Zheng ◽  
He Xian Su ◽  
Zheng Cong Lai
Keyword(s):  
Modal Analysis ◽  
Natural Vibration ◽  
Static Load ◽  
Natural Frequencies ◽  
Load Test ◽  
Static Load Test ◽  
Efficiency Ratio ◽  
Bridge Structures ◽  
T Beam ◽  
Concrete Deck

A load test on a multi-girder concrete bridge of 30m Span having a non-composite deck slab is described. The bridge was designed to have eight simple supported spans, each consisting of a cross section with six RC T beam. Through analyzing the static and dynamic character of bridge structures, calculating efficiency ratio of load test, picking up the results of observation points, it was determined that the girders were acting non-compositely with the concrete deck and that significant restraint was being developed at the bearing supports. Modal analysis and identification ascertain the characteristic properties of bridges from their response. The damage in bridges may be reflected in the changes of their natural frequencies or modes of natural vibration.

Static Load Test and Data Analysis of Tiansheng Bridge

2014 ◽  
Vol 638-640 ◽  
pp. 1107-1110
Author(s):  
Hai Xia Ao ◽  
Yue Zhang ◽  
Yu Ping Yue
Keyword(s):  
Static Load ◽  
Great Depth ◽  
Scientific Basis ◽  
Load Test ◽  
Bridge Structure ◽  
Static Load Test ◽  
Work Condition ◽  
Test Load ◽  
Testing Program ◽  
Bridge Safety

The static load test schemes of Tiansheng bridge are briefly discussed . Through the comparative analysis of the theory values and the measured values , understand the actual work condition of bridge structure under test load and evaluate the bearing capacity of bridge structure .Through comparison of modeling datas and the measured values , test correctness of testing program, providing a scientific basis for the bridge safety and research in great depth.

Study on the Static Load Test of Bridge Inspection

2014 ◽  
Vol 971-973 ◽  
pp. 1156-1159
Author(s):  
Fang Tian ◽  
Guang Ming Xu
Keyword(s):  
Strain Distribution ◽  
Bridge Deck ◽  
Static Load ◽  
Load Test ◽  
System Control ◽  
Bridge Structure ◽  
Control Parameters ◽  
Static Load Test ◽  
Bridge Inspection ◽  
Vehicle Structure

This practice mainly according to different position arrangement of bridge load vehicles (load test), then test the loading vehicle structure under the action of deformation and strain distribution in the cross section of the bridge deck system control parameters, such as through data and theoretical analysis, the test evaluates the performance of the bridge structure.

Static and Dynamic Experiment of the Behavior of the Constructed Hanjiang Super-Major Railway Bridge in Laohekou

2011 ◽  
Vol 255-260 ◽  
pp. 1230-1235 ◽  
Author(s):  
Zhi Wei Qi ◽  
Shu Jun Fang ◽  
Guan Dong Lin ◽  
Hua Wang
Keyword(s):  
Dynamic Load ◽  
Working Condition ◽  
Damping Ratio ◽  
Load Test ◽  
Experimental Results ◽  
Natural Vibration Frequency ◽  
Railway Bridge ◽  
Static Load Test ◽  
Vibration Displacement ◽  
Dynamic Load Test

A static and dynamic load test is carried out on the constructed Hanjiang Super-major Railway Bridge in Laohekou to ensure the reliability of the bridge and test the carrying capacity and working condition of the bridge structure. The static load test is divided into three kinds of loading conditions, each of which tests the stress and deflection of the key sections of the bridge. The transverse vibration displacement of the piers and mid-span section is measured in the dynamic load test when the train is crossing the bridge at different speeds, and the vertical dynamic deflection of the mid-span section is also tested. The natural vibration frequency, the vibration types and the damping ratio of the whole bridge are measured in the pulsating experiment. Through the comparative analysis of the experimental results and the theoretical calculation results and standard, it can be concluded that the strength, the vertical and lateral stiffness of the bridge meet the requirements of both the design and specifications, and that the bridge is in a good working condition. The test and the analysis of the experimental results of the bridge can serve as a reference to the bridges of the same type.

scholarly journals Dynamic load test and lateral load distribution of a modified rigid frame bridge

2021 ◽  
Vol 233 ◽  
pp. 03026
Author(s):  
NING Yu-feng ◽  
YANG Qing-cheng ◽  
SUN Wei-wei ◽  
CHEN Shun-chao
Keyword(s):  
Dynamic Load ◽  
Load Distribution ◽  
Load Test ◽  
Transverse Load ◽  
Main Beam ◽  
Bridge Structure ◽  
Rigid Frame ◽  
Dynamic Load Test ◽  
Impact Coefficient ◽  
Rigid Frame Bridge

In order to evaluate the stress state and working performance of a rigid frame bridge after reconstruction and extension, load test and transverse load distribution were carried out. Static load test is the test of stress at each section of main beam under the action of partial load and medium load. Dynamic load test is used to test the inherent fundamental frequency, damping ratio and impact coefficient of the bridge through pulsation test and sports car test. The results show that the first order vibration of the bridge is mainly transverse vibration from the measured modal parameters, which is consistent with the characteristics of higher pier and greater flexibility. The vibration characteristics of the bridge structure are low frequency and small damping vibration, the value of which belongs to the normal range among similar bridge structures, the overall stiffness of the bridge structure is normal, and the measured impact coefficient during the test of sports car is less than the design impact coefficient, indicating that the dynamic stiffness of the bridge meets the design and specification requirements.

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