scholarly journals Impact Coefficient Analysis of Curved Box Girder Bridge Based on Vehicle-Bridge Coupling

2022 ◽  
Vol 2022 ◽  
pp. 1-11
Author(s):  
Fei Guo ◽  
Heng Cai ◽  
Huifang Li
Keyword(s):  
Shear Force ◽  
Primary Beam ◽  
Dynamic Loads ◽  
Box Girder ◽  
Impact Coefficient ◽  
Force Impact ◽  
Girder Bridge ◽  
The Moment ◽  
The Impact ◽  
Load Weight

In the current vehicle-bridge dynamics research studies, displacement impact coefficients are often used to replace the moment and shear force impact coefficients, and the vehicle model is also simplified as a moving-load model without considering the contribution of vehicle stiffness and damping to the system in some concerned research studies, which cannot really reflect the mechanical behavior of the structures under vehicle dynamic loads. This paper presents a vehicle-bridge coupling model for the prediction of dynamic responses and impact coefficient of the long-span curved bending beam bridge. The element stiffness matrix and mass matrix of a curved box girder bridge with 9 freedom degrees are directly deduced based on the principle of virtual work and dynamic finite element theory. The vibration equations of vehicle-bridge coupling are established by introducing vehicle mode with 7 freedom degrees. The Newmark-β method is adopted to solve vibration response of the system under vehicle dynamic loads, and the influences of flatness of bridge surface, vehicle speed, load weight, and primary beam stiffness on the impact coefficient are comprehensively discussed. The results indicate that the impact coefficient presents a nonlinear increment as the flatness of bridge surface changes from good to terrible. The vehicle-bridge coupling system resonates when the vehicle speeds reach 60 km/h and 100 km/h. The moment design value will maximally increase by 2.89%, and the shear force design value will maximally decrease by 34.9% when replacing moment and shear force impact coefficients with the displacement impact coefficient for the section internal force design. The load weight has a little influence on the impact coefficient; the displacement and moment impact coefficients are decreased with an increase in primary beam stiffness, while the shear force impact coefficient is increased with an increase in primary beam stiffness. The theoretical results presented in this paper agree well with the ANSYS results.

scholarly journals Parametric Analysis of Single-Cell Box Girder Bridge

2021 ◽  
Vol 1197 (1) ◽  
pp. 012047
Author(s):  
R. Manjula ◽  
A. Amrutha
Keyword(s):  
Cost Saving ◽  
Parametric Analysis ◽  
Shear Force ◽  
Paper Analysis ◽  
Bending Moments ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Girder Bridge

Abstract Bridges based on box girders concept are extensively utilized for their cost saving solution for different passages & viaducts that are seen in the present day highway systems. The behavior of box girder bridges is analyzed for stresses in longitudinal and transverse directions. In this paper, analysis of three different box girders has been carried out using SAP2000 as per Indian Road Congress(IRC) provisions for rectangular and trapezoidal sections. The behaviors of box girders with uniform depth and varying widths have been analyzed. A parametric study is conducted for various parameters like bending moments, axial force & shear force using SAP2000.

scholarly journals Dynamic load test and load lateral distribution of box girder bridge in mining area under special load

2019 ◽  
Vol 136 ◽  
pp. 04064
Author(s):  
Shengtao Yuan ◽  
Weilong Zheng ◽  
Shunchao Chen ◽  
Chuanwen Hu ◽  
Wenbo Luo ◽  
...  
Keyword(s):  
Dynamic Load ◽  
Damping Ratio ◽  
Mining Area ◽  
Lateral Distribution ◽  
Load Test ◽  
Natural Vibration Frequency ◽  
Box Girder ◽  
Dynamic Load Test ◽  
Impact Coefficient ◽  
Girder Bridge

Dynamic load test of bridge is one of the important indexes to evaluate bridge operation and bearing capacity, however, the test of the lateral distribution of bridge is one of the important means to evaluate the state of bridge. In order to evaluate the stress condition and working performance of a box girder bridge in a mining area under the special load of 100T, dynamic load test and lateral load distribution are studied, dynamic load test is to test the natural vibration frequency damping ratio and impact coefficient of the bridge through pulsating test and traffic running test, the transverse distribution of load is analyzed by deflection method and the experimental value of transverse distribution coefficient is compared with the theoretical value of girder method. The results show that under dynamic load, the first vertical natural vibration frequency of the bridge is 10.986, the damping ratio is 0.015%, and the impact coefficient is 1.07~1.26, the vertical measured fundamental frequency is larger than the calculated fundamental frequency, and the overall stiffness of the bridge meets with the design specification; the transverse connection among the box girders is close and the lateral distribution of load meets with the requirement of the design specification.

scholarly journals Comparative Study Of Structure Response Isolated Base And Not Isolated Base on IHF School Cimanggis

2020 ◽  
Vol 2 (2) ◽  
pp. 106-118
Author(s):  
Agyanata Tua Munthe ◽  
M Iksan
Keyword(s):  
Shear Force ◽  
Seismic Isolation ◽  
Base Isolation ◽  
Vibration Period ◽  
Heritage Foundation ◽  
Fixed Base ◽  
Technological Developments ◽  
The Moment ◽  
Response Method ◽  
The Impact

Along with technological developments in the field of civil engineering, various systems are used to reduce the impact of earthquakes on the structure. One system that has long been developed is a passive prevention system consisting of seismic isolation. Buildings that use seismic dumper are expected to fail structure when an earthquake occurs. This study discusses the comparison of internal forces in buildings using base isolation and without base isolation. The building which is the case study is the Indonesian Heritage Foundation school building in Cimanggis. The analysis uses the 2016 ETABS program. Earthquake analysis uses the Spectrum Response method. From the research results, it is known that the building which was installed with an insulator shakes the structure to 1,344 seconds. The vibration period of the structure increased 41% from the vibration period of the structure which still used a fixed base of 0.796 seconds. Seen from the intersection between floors the maximum direction of X can be reduced by 15.4% by installing an insulator. The same thing happened to the maximum inter-floor deviation for the Y direction deviation is muted by 27.75%. Base isolation installation reduces the moment in a column by 36% in the earthquake X direction and 61% in the earthquake Y direction. For column shear force is reduced by 58% in the earthquake X direction and 75% in the earthquake Y direction. Base isolation can reduce basic shear force in buildings by 24.49% in the X direction of the building and 22.24% in the Y direction.

scholarly journals Load Distribution In Adjacent Precast "Deck Free" Concrete Box-Girder Bridges

2021 ◽  
Author(s):  
Waqar Khan
Keyword(s):  
Prestressed Concrete ◽  
Precast Concrete ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge ◽  
The Moment

Bridges built with adjacent precast, prestressed concrete box-girders are a popular and economical solution for short-span bridges because they can be constructed rapidly. The top flanges of the precast box girders form the bridge deck surface. A shear key is introduced between the adjacent boxes over the depth of the top flange (i.e. 225 mm thick as the thickness of the box's top flange). Canadian Highway Bridge Design Code, CHBDC specifies empirical equations for the moment and shear distribution factors for selected bridge configurations but not for adjacent precast concrete box-girder bridge type. In this study, a parametric study was conducted, using the 3D finite-element modeling, and a set of simplified equations for the moment, shear and deflection distribution factors for the studied bridge configuration was developed.

Analysis of Loading Test Research on a Steel-Concrete Composite Box Girder Bridge

2013 ◽  
Vol 438-439 ◽  
pp. 908-912
Author(s):  
Zhi Yong Wang ◽  
Qiu Yan Sun ◽  
Du Bo Wang
Keyword(s):  
Loading Test ◽  
Box Girder ◽  
Calculation Results ◽  
Impact Coefficient ◽  
Design Requirements ◽  
Static And Dynamic Tests ◽  
Working Performance ◽  
Box Girder Bridge ◽  
Stress And Deformation ◽  
Girder Bridge

In order to understand the overall mechanical characteristics of a steel-concrete composite box girder bridge, static and dynamic tests were carried out. According to the results of tests and calculations, its bearing capacity and working performance were evaluated. The results show that the stress and deformation at control cross-section of the bridge meet design requirements under the static load, the vibration frequency and impact coefficient consistent with the theoretical calculation results under the dynamic load.

The Analysing of Coupled Bending Tosion and Shear-Lag of Curved Box Girder Bridge Considering Prestress and Initial Curvature

2012 ◽  
Vol 446-449 ◽  
pp. 3360-3364 ◽  
Author(s):  
Jin Li Qiao ◽  
Yong Jin ◽  
Wen Ling Tian ◽  
Fan Li
Keyword(s):  
Energy Functional ◽  
Displacement Function ◽  
Shear Lag ◽  
Box Girder ◽  
Initial Curvature ◽  
Lag Effect ◽  
Box Girder Bridge ◽  
Functional Differential ◽  
Girder Bridge ◽  
The Impact

Based on the theory of thin-walled curved bar and considered the impact of initial curvature and prestress on the vertical flexure, the shear lag warp displacement function is replenished on the basic deformation of the curved box girder flange plate, for which the longitudinal dispersive function is utilized. According to the energy functional differential methods, the coupled bending tosion and shear lag of elasticity governing differential equations of curved prestressed box girder are deduced with different boundary conditions in considering prestress and initial curvature. The numerical solution is gained by Galerlein method. The calculated value of this article coincides well with the value of the experiment and finite-element method. It builds the theory analysing basic of shear lag effect of curved box girder bridge considering prestress and initial curvature.

Analysis of Effection of the Prestressing Force on Shear Lag in Curved Box Girder

2010 ◽  
Vol 150-151 ◽  
pp. 1022-1025
Author(s):  
Yu Hong Zhang ◽  
Jian Shun Zhang
Keyword(s):  
Impact Factors ◽  
Shear Lag ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Prestressing Force ◽  
Structural Force ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
The Impact

The impact on curved box girder bridges due to applying prestressing force have been analyzed using finite element method. This paper presents the results of an experimental investigation and analytical studies. Based on the model experiment, the results and conclusions of shear lag in curved box girder with prestressing force are presented that prestressing force has changed shear lag distribution. The prestressing force action on box girder shall be considered comprehensively, structural force shall be analyzed accurately, optimize prestressing tendons shall be set rationally which would make force more rationally. The results highlighted that the impact factors of a curved box girder bridge have been observed to be generally very high, while those of the other responses are also relatively higher than that of corresponding straight box girder bridge.

scholarly journals Analysis of Pre-Stressed Box Girder Bridge under Different Standard Codes: A Comparative Study

2021 ◽  
Vol 1197 (1) ◽  
pp. 012068
Author(s):  
Shubham S. Hande ◽  
Sharda P. Siddh ◽  
Prashant D. Hiwase
Keyword(s):  
Shear Force ◽  
Bending Moment ◽  
Concrete Bridge ◽  
Box Girder ◽  
Analysis And Design ◽  
Bridge Span ◽  
Vehicle Load ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Aashto Lrfd

Abstract Pre-stressed concrete bridge analysis is completely dependent on the standards and design criteria. Herein, the current study compares like a pre-stressed concrete bridge under the effect of two different loading standards and specifications. The two different loading standards considered herein are IRC 6: 2000 and AASHTO-LRFD standards. Further, the pre-stressed box girder bridge is modelled and analysis in MIDAS CIVIL. On carrying out analysis, the primary structural analysis parameters which are important for the design of structure, are studied. These parameters are shear force, bending moment and torsion in the bridge elements along its length. It became observed that AASHTO standards are uneconomical than IRC standards, due to consideration of heavy weight vehicle load moving on the bridge span. Thus, it might be said that pre-stressed box girder bridge analysis and design should be carried out effectively and optimistically using IRC standards and specifications.

scholarly journals Shear Lag Effect and Accordion Effect on Dynamic Characteristics of Composite Box Girder Bridge with Corrugated Steel Webs

2020 ◽  
Vol 10 (12) ◽  
pp. 4346
Author(s):  
Yuntai Zhang ◽  
Lizhong Jiang ◽  
Wangbao Zhou ◽  
Yulin Feng
Keyword(s):  
Natural Vibration ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Box Girder ◽  
Accordion Effect ◽  
Lag Effect ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
The Impact ◽  
Span Width

This study proposed a dynamic characteristic analytical method (ANM) of a composite box girder bridge with corrugated steel web (CBGCSW) by completely considering the impact of shear lag effect and accordion effect of corrugated steel webs. Based on energy principles and variational principles, a vibration differential equation and the natural boundary conditions of a CBGCSW were developed. The analytical calculation formula for solving the vibration differential equation was then obtained. The results calculated using the ANM agreed well with previous experimental results, which validated the correctness of ANM. To demonstrate the superiority of the ANM, the vibration frequencies of several abstract CBGCSWs with varying ratios of span–width, obtained using the elementary beam theory (EBT) and the finite element method (FEM), were compared with those obtained by ANM. The efficacy of the ANM was verified and some meaningful conclusions were drawn which are helpful to relevant engineering design, such as the observation that a higher natural vibration frequency and smaller span–width ratio significantly magnified the shear lag effect of CBGCSW. The first five-order natural vibration frequencies of the CBGCSW were significantly lower than those of the composite box girder bridge with general steel web (CBGGSW), which indicates that the impact of the accordion effect is significant.

scholarly journals Load Distribution In Adjacent Precast "Deck Free" Concrete Box-Girder Bridges

2021 ◽  
Author(s):  
Waqar Khan
Keyword(s):  
Prestressed Concrete ◽  
Precast Concrete ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge ◽  
The Moment

Bridges built with adjacent precast, prestressed concrete box-girders are a popular and economical solution for short-span bridges because they can be constructed rapidly. The top flanges of the precast box girders form the bridge deck surface. A shear key is introduced between the adjacent boxes over the depth of the top flange (i.e. 225 mm thick as the thickness of the box's top flange). Canadian Highway Bridge Design Code, CHBDC specifies empirical equations for the moment and shear distribution factors for selected bridge configurations but not for adjacent precast concrete box-girder bridge type. In this study, a parametric study was conducted, using the 3D finite-element modeling, and a set of simplified equations for the moment, shear and deflection distribution factors for the studied bridge configuration was developed.

Sign in / Sign up

Export Citation Format

Share Document