Dynamic Response for Collision Load between Over-Height Truck and Curved Beam Bridge

2013 ◽  
Vol 473 ◽  
pp. 25-29 ◽  
Author(s):  
Yan Zhang
Keyword(s):  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Reinforced Concrete Beam ◽  
Damage Effect ◽  
Girder Bridges ◽  
Bridge Superstructure ◽  
Curved Girder Bridges ◽  
Beam Incident ◽  
Beam Bridge ◽  
The Impact

In recent years, ultra-urban road overpass vehicle impact beam incident after another. High beam impact of vehicles on the overpass bridge safety impact has become another important issue. High trucks at home and abroad on the curve of reinforced concrete beam bridge working effect of the impact is still insufficient. Based on high-precision linear dynamic finite element simulation analysis, research under the action of high vehicle collision, reinforced concrete curved girder Bridges of local damage effect and the overall distortion performance. The results showed that: high vehicles on the bridge superstructure imposed impact impulse and punching power led bridge superstructure is hitting zone produce local cracks. Damage caused by different impact velocity varied.

The Impact Load on a Reinforced Concrete Beam

2021 ◽  
pp. 199-245
Author(s):  
Farzad Hejazi ◽  
Hojjat Mohammadi Esfahani
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Impact Load ◽  
Reinforced Concrete Beam ◽  
The Impact

Dynamic Response of Simply-Supported Curved Girder Bridges due to Vehicles

2011 ◽  
Vol 255-260 ◽  
pp. 1825-1829
Author(s):  
Jian Qing Bu ◽  
Gen Wang Li
Keyword(s):  
Dynamic Response ◽  
Impact Factor ◽  
Torsion Angle ◽  
Radius Of Curvature ◽  
Vertical Deflection ◽  
Simply Supported ◽  
Girder Bridges ◽  
Bridge Model ◽  
Curved Girder Bridges ◽  
The Impact

The purpose of this paper, for which a finite element bridge model with 7 degrees of freedom per node and the 1/4 vehicle model with six parameters were established, is to analyze the dynamic response of curved girder bridges under vehicular loads. In the numerical simulation, the vibration characteristics of simply-supported curved girder bridge are analyzed, and the effect to the impact factors were also studied for different radiuses of curvature, eccentricities, ratios between bending and torsion stiffness, and vehicle speeds. The simulated results show that not all the first 5 natural frequencies increase with the variation of radius of curvature. The impact factor variations of vertical deflection and torsion angle are not uniform when parameters changed, and the impact factor of torsion angle would be much larger than that of vertical deflection under the same conditions.

The Impact on the Pier of Shaped Charge Ice-Breaking and Numerical Simulation Analysis

2014 ◽  
Vol 501-504 ◽  
pp. 1883-1887
Author(s):  
Wen Yuan Meng ◽  
Jia Qing Li ◽  
Ying Kui Guo ◽  
Guan Chao Xu ◽  
Jun Wei Guo
Keyword(s):  
Numerical Simulation ◽  
Reinforced Concrete ◽  
Maximum Stress ◽  
Simulation Analysis ◽  
Shaped Charge ◽  
Ice Water ◽  
The Impact

In the process of shaped charge ice-breaking , the response of piers is great under the impact of air, ice, water etc, and relates to integral security of the bridge. For the impact on the pier with burst points of the different distances is simulated by ANSYS / DYNA software, summarizes the impact on the pier of shaped charge ice-breaking, and obtains the maximum stress curves of the pier at different distances. Simultaneously, the paper analyses critical damaging- model of the C30 reinforced concrete piers in detail. The conclusion has a major role in guiding when shaped charge ice-breaking appears.

Impact-Resistant Performance Analysis of Composite Laminates for Reinforced Concrete Beam Fixed and Hinged at Different Ends

2013 ◽  
Vol 482 ◽  
pp. 30-33
Author(s):  
Run Lin Yang ◽  
Li Zhao ◽  
Juan Hua Zhou
Keyword(s):  
Reinforced Concrete ◽  
Composite Laminates ◽  
Concrete Beam ◽  
Impact Load ◽  
Reinforced Concrete Beam ◽  
Protective Measure ◽  
Protective Effects ◽  
Structural Members ◽  
Protective Measures ◽  
The Impact

Structural members are vulnerable to be damaged under the impact loads. According to traditional design methods, the impact load is seldomly considered. However, recently this situation is changed gradually. In view of this, impact-resistant performance of a new composite protective device was analyzed. A reinforced concrete beam with composite laminates, which was fixed at one end and hinged at the other end, was studied. Totally, the four cases including the unprotected, the rigid, the flexible and the composite protective measures were considered. The protective effects of the different measures can be compared by observing the strain, the displacement, the acceleration and the impact force of the target beam. Simulation results show that the composite protective measure can improve the impact-resistant effect of the target beam significantly and its dynamic response is suppressed effectively.

A Study for Evaluating Local Damage to Reinforced Concrete Panels Subjected to Oblique Impact: Part 2 — Simulation Analysis of the Experimental Results of Local Damage Caused by Impact of Deformable Projectiles

2017 ◽  
Author(s):  
Akemi Nishida ◽  
Yoshimi Ohta ◽  
Haruji Tsubota ◽  
Yinsheng Li
Keyword(s):  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Impact Load ◽  
Oblique Impact ◽  
Local Damage ◽  
Impact Tests ◽  
Rigid Projectile ◽  
Oblique Impacts ◽  
Simulation Results ◽  
The Impact

Many empirical formulae have been proposed for evaluating the local damage to reinforced concrete structures caused by rigid projectile impact. Most of these formulae are based on impact tests perpendicular to the target structures. To date, few impact tests oblique to the target structures have been conducted. In this study, we aim to obtain a new formula for evaluating the local damage caused by oblique impacts based on previous experimental and simulation results. We analyze and simulate the local damage owing to impact by deformable projectiles. The experimental and simulation results were in good agreement and confirmed the validity of the proposed analytical method. Furthermore, the internal energy of the deformable projectile absorbed upon impact was approximately 60% of the total energy. In comparison to a rigid projectile, it is possible to reduce the impact load and consequently the damage to the target.

The Disease Treatment Measures and Intensification of Reinforced Concrete T-Shaped Girder Bridges

2012 ◽  
Vol 532-533 ◽  
pp. 321-324 ◽  
Author(s):  
Ya Xun Yang ◽  
Zhi Kui Yang ◽  
Chao Qiao
Keyword(s):  
Reinforced Concrete ◽  
Detailed Analysis ◽  
Prestressed Concrete ◽  
Bridge Construction ◽  
Disease Treatment ◽  
Girder Bridges ◽  
Good Economy ◽  
Treatment Measures ◽  
Beam Bridge ◽  
T Beam

Reinforced concrete and Prestressed concrete T-beam bridge are widely used because they have the features of good economy and easy construction in bridge construction. However, with the increase in traffic and the growth of hours of operation, diseases like the increase of the deflection in this bridge,the more cracks,etc.,are being emerging gradually.According to the disease of Chun Ma Bridge while that is being used, we have made a detailed analysis,and proposed purposeful measures to deal with the disease as well as the design to reinforce the bridge,solved the problem of the safety in the bridge operation. This article have made a good in-depth discussion and analysis on the T-beam retrofitting,and it will have a guidance significance for the similar bridges in the future.

Impact-Resistant Analysis of Hinged Reinforced Concrete Beam with Composite Laminates

2014 ◽  
Vol 501-504 ◽  
pp. 1000-1003
Author(s):  
Run Lin Yang ◽  
Jie Kong ◽  
Juan Hua Zhou
Keyword(s):  
Reinforced Concrete ◽  
Composite Laminates ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Impact Loads ◽  
Building Structures ◽  
Structural Members ◽  
Composite Measure ◽  
Protective Measures ◽  
The Impact

Under the impact loads, once the key load-bearing member is damaged, it will endanger the entire building structures. Hence, it is very important to study impact-resistant performance of structural members. In order to verify effectiveness of a new composite protective device proposed in the earlier time, a reinforced concrete beam hinged at both ends was choosen as the observed object. During the process of numerical simulation, the four different protective measures including the unprotected, the rigid, the flexible and the composite one were considered in sequence. Numerical results show that the proposed composite measure can achieve the best protective effect, and it may be considered as a new option for impact-resistant protection of structural memebers.

The Analysis of Impact Coefficient on Reinforced-Concrete Bridge

2012 ◽  
Vol 204-208 ◽  
pp. 786-789
Author(s):  
Chun Xiang Qi ◽  
Fei Xia ◽  
Run Feng Zhang
Keyword(s):  
Reinforced Concrete ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Reinforced Concrete Bridge ◽  
Detection Technology ◽  
Impact Coefficient ◽  
Set Up ◽  
Beam Bridge ◽  
Bridge Spans ◽  
The Impact

In order to discuss the displacement impact coefficient of the simply supported beam bridge, reinforced-concrete simply supported beam models with different span and different section stiffness are set up using the finite element method in the paper. The maximum dynamic displacement of beam models under the running vehicle is calculated. Combined with the maximum static displacement, the corresponding impact coefficients of models are calculated. At the same time, the modal analysis of beams is conducted to calculate the impact coefficient based on the base frequency. From comparing with the displacement impact coefficient, the bridge spans and section stiffness influence on impact coefficient is analyzed. Results show that the influence of section stiffness on impact coefficient can be ignored, but the influence of the change of span cannot be ignored. It will provide a reference for designing and detection technology of reinforced-concrete simply supported beam.

A Study for Evaluating Local Damage to Reinforced Concrete Panels Subjected to Oblique Impact of Deformable Projectile

2017 ◽  
Author(s):  
Akemi Nishida ◽  
Yoshimi Ohta ◽  
Haruji Tsubota ◽  
Yinsheng Li
Keyword(s):  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Impact Angle ◽  
Local Damage ◽  
Empirical Formulas ◽  
Concrete Panels ◽  
Impact Tests ◽  
Oblique Impacts ◽  
The Impact

Many empirical formulas have been proposed for evaluating local damage to reinforced concrete structures caused by impacts of rigid projectiles. Most of these formulas have been derived based on impact tests perpendicular to the target structures. Up to now, few impact tests oblique to the target structures have been carried out. This study has been conducted with the purpose of proposing a new formula for evaluating the local damage caused by oblique impacts based on previous experimental and simulation results. In this paper, the results of simulation analyses for evaluating the local damage to reinforced concrete panels subjected to normal and oblique impacts by deformable projectile, by using the simulation method that the validity was confirmed through simulation analysis of past impact experimental results. Based on the results of these simulation analyses, the quantitative evaluation of reduction effects in the local damage caused by the difference of the impact angle is investigated.

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