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.

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.

Analysis of Bridge Pier’s Dynamic Characteristics Considering Fluid-Solid Interface Coupling

2014 ◽  
Vol 1049-1050 ◽  
pp. 464-468
Author(s):  
Chen Hui Jin ◽  
Bo Ming Zhao ◽  
Run Bo Bai
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Great Influence ◽  
Water Structure ◽  
Natural Vibration Frequency ◽  
Finite Element Software ◽  
Interface Coupling ◽  
Solid Interface ◽  
Calculation Results

In the study of bridge pier’s dynamic characteristics, the modal analysis is the foundation of other dynamic analysis and is of great significance for studying other dynamic performance. Based on the dynamic theory of fluid-solid interface coupling, a 3D water-structure coupling finite element modal is established and computed by ANSYS. To verify the validity of the calculation results, the results of finite element software is compared with the analytical solutions in reference books. The analysis indicated that the results of finite element software are reasonable when the radius of bridge pier is five times the radius of water body. The ratio of water depth and the bridge pier’s height has a great influence on the change scale of bridge pier’s frequency. With the increase of bridge pier’s height-diameter ratio, the first three order natural vibration frequency is reduced.

Dynamic Performance Analysis for a Butterfly-Shaped Arch Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 74-78
Author(s):  
Hai Yun Huang ◽  
Xiang Rong Yuan ◽  
Ka Hong Cai
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Element Model ◽  
Loading Test ◽  
Structural Dynamic ◽  
Arch Bridge ◽  
Calculation Results ◽  
Dynamic Performance Analysis

The dynamic characteristics are not only the important indexes for evaluating the bridge structural rigidity, but also the principal parameters for structural dynamic analysis and earthquake resistant analysis. In this paper, a three dimensional solid finite element model for a butterfly-shape arch bridge in Zhongshan city was established to analyze the dynamic characteristics. By comparison the numerical calculation results with measured results of the dynamic loading test, an analysis and evaluation of the dynamic performance of this new type spatial arch bridge was made, and can serve as reference to the dynamic analysis and seismic design of similar bridges.

scholarly journals Numerical Evaluation of Dynamic Responses of Steel Frame Structures with Different Types of Haunch Connection Under Blast Load

2020 ◽  
Vol 10 (5) ◽  
pp. 1815
Author(s):  
Mustafasanie M. Yussof ◽  
Jordan Halomoan Silalahi ◽  
Mohd Khairul Kamarudin ◽  
Pei-Shan Chen ◽  
Gerard A. R. Parke
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Performance ◽  
Blast Loading ◽  
Steel Frame ◽  
Dynamic Responses ◽  
Blast Load ◽  
Structural Dynamic ◽  
Finite Element Software ◽  
Steel Frame Structures ◽  
Ductility Ratio

This research is aimed at investigating the dynamic behaviour of, and to analyse the dynamic response and dynamic performance of steel frames strengthened with welded haunches subjected to a typical hydrocarbon blast loading. The structural dynamic analysis was carried out incorporating the selected blast load, the validated 3D model of the structures with different welded haunch configurations, steel dynamic material properties, and non-linear dynamic analysis of multiple degree of freedom (MDOF) structural systems. The dynamic responses and effectiveness of the reinforced connections were examined using ABAQUS finite element software. Results showed that the presence of the welded haunch reinforcement decreased the maximum frame ductility ratio. Based on the evaluation of the results, the haunch reinforcements strengthened the selected steel frame and improved the dynamic performance compared to the frame with unreinforced connections under blast loading, and the biggest haunch configuration is the “best” type.

Dynamic Performance and Seismic Analysis of Tied Arch Bridge

2012 ◽  
Vol 446-449 ◽  
pp. 1119-1122 ◽  
Author(s):  
Hui Jun Wu ◽  
Wen Liang Qiu
Keyword(s):  
Finite Element ◽  
Seismic Waves ◽  
Seismic Analysis ◽  
Dynamic Performance ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Arch Bridge ◽  
Finite Element Software ◽  
Tied Arch Bridge ◽  
Dynamic Performance Analysis

Based on the anti-seismic research achievements of tired arch bridge at home and abroad, taking River City Bridge in Jilin as an example, a finite element model is established for dynamic performance analysis by general finite element software midas civil. Natural vibration characteristics of tied arch bridge are calculated as a basis for further dynamic calculation. Firstly, choose appropriate seismic waves according to the geological data. Then perform the dynamic response analysis of this bridge under different loading cases. Dynamic responses of this bridge under longitudinal and transverse seismic waves are studied respectively, and the influence of vertical seismic wave is also considered. It is shown that the influence on seismic response of vertical seismic waves is very obvious. The vertical seismic waves should be considered while doing seismic design of tied arch bridges.

The Analysis of Wind Power Generation Tower Based on SSI Effect

2013 ◽  
Vol 333-335 ◽  
pp. 1500-1503
Author(s):  
Xie Yao
Keyword(s):  
Wind Power ◽  
Vibration Frequency ◽  
High Stability ◽  
Natural Vibration ◽  
Wind Power Generation ◽  
Maintenance Cost ◽  
Natural Vibration Frequency ◽  
Main Research ◽  
Finite Element Software ◽  
Wind Turbine Tower

With the development of wind turbines trend of single machine but large capacity, and with the concrete wind-turbine tower has many advantages such as corrosion resistance, high stability, convenient manufacture in-site and lower maintenance cost, concrete tower will have more and more wide prospect. Application of large finite element software FINAL, the main research is the influence of SSI effect on wind power tower natural vibration frequency. We can know that SSI effect is very important for wind power tower natural vibration frequency. So we can not ignore the influence of the interaction between soil and structure. We should pay more attention to this actor when we design or analyse a wind power tower.

scholarly journals Off-Design Dynamic Performance Analysis of a Solar Aided Coal-Fired Power Plant

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2950
Author(s):  
Vinod Kumar ◽  
Liqiang Duan
Keyword(s):  
Power Plant ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Thermal Efficiency ◽  
Dynamic Performance ◽  
Feed Water ◽  
Saving Rate ◽  
Coal Consumption ◽  
Dynamic Performance Analysis

Coal consumption and CO2 emissions are the major concerns of the 21st century. Solar aided (coal-fired) power generation (SAPG) is paid more and more attention globally, due to the lesser coal rate and initial cost than the original coal-fired power plant and CSP technology respectively. In this paper, the off-design dynamic performance simulation model of a solar aided coal-fired power plant is established. A 330 MW subcritical coal-fired power plant is taken as a case study. On a typical day, three various collector area solar fields are integrated into the coal-fired power plant. By introducing the solar heat, the variations of system performances are analyzed at design load, 75% load, and 50% load. Analyzed parameters with the change of DNI include the thermal oil mass flow rate, the mass flow rate of feed water heated by the solar energy, steam extraction mass flow rate, coal consumption, and the plant thermal efficiency. The research results show that, as DNI increases over a day, the coal saving rate will also increase, the maximum coal saving rate reaches up to 5%, and plant thermal efficiency reaches 40%. It is analyzed that the SAPG system gives the best performance at a lower load and a large aperture area.

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