Influencing factors on dynamic performance of composite curved beam bridge with corrugated webs

2021 ◽  
pp. 813-819
Author(s):  
S.N. Wang ◽  
H.J. Guan ◽  
C.W. Yao ◽  
C.S. Wang ◽  
Q.L. Wu
Keyword(s):  
Influencing Factors ◽  
Dynamic Performance ◽  
Curved Beam ◽  
Corrugated Webs ◽  
Beam Bridge

Analysis of a Curved Beam MEMS Piezoelectric Vibration Energy Harvester

2010 ◽  
Vol 139-141 ◽  
pp. 1578-1581 ◽  
Author(s):  
Yong Zhou ◽  
Yong Dong ◽  
Shi Li
Keyword(s):  
Energy Harvester ◽  
Dynamic Performance ◽  
Beam Theory ◽  
Vibration Energy ◽  
Curved Beam ◽  
Vibration Energy Harvester ◽  
Coupling Vibration ◽  
Structural Assembly ◽  
Piezoelectric Vibration Energy Harvester ◽  
Piezoelectric Vibration

An analytical model is derived for obtaining the dynamic performance of a thin curved composite piezoelectric beam with variable curvatures for the MEMS piezoelectric vibration energy harvester. The plane curved beam theory with rectangular section is employed to explore the bending and twisting coupling vibration characteristics. In order to satisfy the most available environmental frequencies, which are on the order of 1000Hz, the parameters of the spiraled composite beam bonded with piezoelectric on the surfaces are investigated to provide a method of how to design low resonance beams while keeping the compacting structural assembly. The results indicate the adoption of ANSYS® software to carry out the MEMS piezoelectric vibration energy harvester’s numerical simulation can improve the accuracy of the harvester designing and manufacturing consumedly. And the simulation data also provide a theory analysis foundation for the engineering, design and application of harvester.

The Dynamic Characteristic and Response's Discussion of External Prestressing Curved Beam

2014 ◽  
Vol 919-921 ◽  
pp. 254-257
Author(s):  
Min Yuan Huang
Keyword(s):  
Dynamic Characteristic ◽  
Model Test ◽  
Dynamic Performance ◽  
Performance Model ◽  
Theoretical Formula ◽  
Natural Vibration Frequency ◽  
Curved Beam ◽  
External Prestressing ◽  
Test Study ◽  
Concrete Damage

The main contents of dynamic characteristic and response of external prestressing curved beam are as follows: The research is about frequency characteristic of external prestressing curved beam. With analysis of variable regulation, the natural frequency's theoretical formula can derived from natural vibration frequency under structure concrete damage .Resonance prevention of external prestressing curved beam is vital. Through explicit beam frequency, external cable and external excitation, and the relationship between above each other can prevent resonance destruction .By analysis of dynamic performance's parameter sensitivity , external prestressing curved beam can be obtained sensitivity parameter of dynamic performance .Model test study of dynamic external prestressing curved beam is also critical. Based on research achievements of existing theory, dynamic model test can be carried on, which would obtain vibration regulation of verification and comparison with structure data.

Engineering Application of External Prestressing Curved Beam

2013 ◽  
Vol 639-640 ◽  
pp. 1249-1252
Author(s):  
Min Yuan Huang ◽  
Zong Ren Zou
Keyword(s):  
Control Parameter ◽  
Dynamic Performance ◽  
Natural Vibration Frequency ◽  
Curved Beam ◽  
Structural Dynamic ◽  
Main Research ◽  
Finite Element Software ◽  
External Prestressing ◽  
Anchoring System ◽  
Dynamic Performance Analysis

Using the finite element software ANSYS to analyze dynamic characteristics of external prestressing structure, reasonable control parameter, as well as external prestressing reinforcement joints of security, the main research contents and results are as follows: Dynamic performance analysis is about variation law and internal feature. With the increase of external prestressing, on the contrary, the natural vibration frequency will reduce. However, external prestressing effects on the structural dynamic performance improvement that is not obvious in general. Based on sensitivity analysis, control parameter of external prestressing reinforcement curved beam must be analyzed and the reasonable value range of sensitive control parameter can be found. For the control parameter of external prestressing process, its reasonable control parameter’s range should be about 6% in the theoretical calculation. While simulating of anchoring system, local force on anchoring system must be analyzed finely and accurately. A comprehensive understanding should be mastered on variation law, which is about the internal forcing and stress response of special area. The setting of anchoring device shall be arranged at 1/3 place of original prestressing position. To ensure the safety, it should guarantee the mechanical continuity of anchor joints.

Analysis of Influencing Factors of Welded Turnout Slab with Convex Block of Ballastless Track on Bridge

2011 ◽  
Vol 71-78 ◽  
pp. 1664-1668
Author(s):  
Yuan Xing Hao ◽  
Feng Dai ◽  
Rong Shan Yang
Keyword(s):  
Influencing Factors ◽  
Longitudinal Force ◽  
The Other ◽  
Continuous Beam ◽  
Computation Model ◽  
Temperature Range ◽  
Ballastless Track ◽  
Continuous Beam Bridge ◽  
Calculation Results ◽  
Beam Bridge

To figure out the structure and influencing factors of welded welded turnout slab convex block of ballastless track on bridge, according to the characteristics of force and displacement of welded turnout on bridge, the turnout-bridge-platform integration computation model was established by finite element method. Taking the ballastless turnout on a continuous beam bridge as the example, the longitudinal force and displacement of the bridge and parts of the turnout was obtained by the means of changing the numbers of slab, the stiffness of convex block support and the temperature range of slabs. The calculation results indicate: using three slabs is reasonable for the ballastless turnout on bridge; The stiffness of convex block supports on slabs should be set between 250kN/mm and 300kN/mm; Since the change of longitudinal force is very large, while the other parameters change little, with the change of the temperature range of slabs, slabs in turnout should be strengthen.

scholarly journals ANALYSIS OF LATERAL DISPLACEMENT AND EVALUATION OF TREATMENT MEASURES OF CURVED BEAM: A CASE STUDY

2021 ◽  
Vol 30 (1) ◽  
Author(s):  
Jie Li ◽  
Dongchao Liang ◽  
Junfeng Zhang ◽  
Zhaodong Shi ◽  
Huai Chen
Keyword(s):  
Temperature Effect ◽  
Lateral Displacement ◽  
Residual Deformation ◽  
Element Model ◽  
Monitoring Data ◽  
Curved Beam ◽  
Displacement Monitoring ◽  
The Status ◽  
Reinforcement Measures ◽  
Beam Bridge

The curved beam bridge exhibits lateral displacement during construction and operation. Taking a curved beam bridge as an example, the status of lateral displacement of the bridge is investigated in detail in this paper. To understand the mechanism of the curved beam lateral displacement, further to determine the curved beam lateral displacement under temperature effect, using ANSYS software to establish solid element model of the curved beam, steady state thermal analysis method is applied to analyze temperature field. Based on the analysis, the lateral displacement under temperature effect is analyzed. Then in order to further explain the lateral displacement mechanism, to discuss the frictional force causing the residual deformation of the rubber bearing to make the lateral displacement of the curved beam, the mechanical mechanism of curved beam under temperature effect is approximately analyzed. On the basis of clarifying the mechanism of lateral displacement, the paper puts forward the reinforcement measures for the curved beam bridge. In order to verify the treatment effect, long-term displacement monitoring is performed on the bridge. Numerical studies and monitoring data show that temperature is the main factor that causes the lateral displacement. Monitoring data over the past year shows that the displacement of the bearing is less than the value of allowable displacement after the reinforcement measures are adopted, and the bridge is in a safe state.

Deformation Analysis of Short and Medium Span Curved Beam Bridge

2013 ◽  
Vol 347-350 ◽  
pp. 3546-3549
Author(s):  
Ju Jin ◽  
Xiao Fan Zhu ◽  
Hai Feng Ren
Keyword(s):  
Deformation Analysis ◽  
Curved Beam ◽  
Transverse Displacement ◽  
Software Modeling ◽  
Analysis Software ◽  
Element Analysis ◽  
Complex Needs ◽  
Deformation Law ◽  
Girder Bridge ◽  
Beam Bridge

Curved girder bridge can adapt to the complex needs of road, so it applies more and more. Because prestressed curved girder bridge is spatial structure, its deformation under load, prestress etc is very complicated. If ill-considered, it will cause accidents as cracking of beam body, too large transverse displacement and bearing disengaging etc. In this paper, by analysis of engineering examples, using ANSYS finite element analysis software modeling and calculating, we get the deformation law of small and medium span curved girder bridge under deadweight and prestress, and the law has guiding significance and practical value on design.

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