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bridge protection    
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  桥梁
    After a general disease checking and safety evaluation of the bridge, it summarizes the typical disease which appears after a bridge’s long-term operation, analyses the reason of producing disease and discusses the reinforce methods, finally it contraposingly summarizes the problems which should be adverted in the course of bridge protection.
    在对桥梁进行全面病害检查和安全评定后,总结了桥梁在长期运营后所出现的典型病害,分析了病害产生的原因并探讨了加固的方法,最后有针对性的总结了在桥梁养护过程中应注意的问题。
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  bridge protection
After a sensitivity analysis, the failure probability referred to extreme displacement and the mean value of dissipated energy are assessed by using the introduced stochastic indices of seismic bridge protection efficiency.
      


One of the major causes for bridge damage is the collision of ship.this paper provides an overview on the research for bridge protection device.the ship-bridge collision mechanism,including moving dynamic characteristic and structure dynamic failure mechanism, is summarized.The major methods and devices adopted in protecting bridge now in the engineering building are introduced.the merits of these devices and application region are analyzed.

对水路航运中桥墩防撞设施的研究进行总结和介绍 ,归纳和分析船桥碰撞机理 ,对世界上现有的防撞设施和适用范围进行说明

Large bridges are facing rigorous threat from laser-guided bombs. The attack pattern and fire control system against laser-guided bombs are analyzed in the paper. The limitations of protection methods available are discussed. The research shows that protection countermeasures, such as, making use of the laser warning,covering true target and showing false one, as well as establishing air obstacles,can binder the enemy's probing and attacking, and increase bridges' protection ability....

Large bridges are facing rigorous threat from laser-guided bombs. The attack pattern and fire control system against laser-guided bombs are analyzed in the paper. The limitations of protection methods available are discussed. The research shows that protection countermeasures, such as, making use of the laser warning,covering true target and showing false one, as well as establishing air obstacles,can binder the enemy's probing and attacking, and increase bridges' protection ability.

分析了激光制导炸弹对大型桥梁构成的威胁及其攻击方式,阐述了现有大型桥梁防护方法的局限性,并提出了相应的防护对策。研究表明,利用激光告警技术、实施隐真示假和设置阻、炸型空障等防护措施,可增大敌侦察与攻击难度,提高桥梁防护能力。

Girder damage is one of the main part for bridge damages during earthquake.With the development of anti-seismic technology,more and more restrainers used for bridge protection are studied.But they are mainly limited in the qualitative study on the effect of bumper devices without consideration of dissipation capability.According to the experimental results on bumper devices with energy dissipation capability,the design method and calculating model based on the response spectrum are proposed.The mitigation...

Girder damage is one of the main part for bridge damages during earthquake.With the development of anti-seismic technology,more and more restrainers used for bridge protection are studied.But they are mainly limited in the qualitative study on the effect of bumper devices without consideration of dissipation capability.According to the experimental results on bumper devices with energy dissipation capability,the design method and calculating model based on the response spectrum are proposed.The mitigation effect of the methods of the compression bumpers on a model bridge is studied with nonlinear dynamic analysis.The results indicate that the cylinder bumper device has notable cushion effect.Comparing with the effect of bumper devices without energy dissipation capability,it is evident that the ductility distortion of piers and the largest displacement between girders and stoppers would be reduced on different scale.The design methods of cylinder bumper device are effective.

梁间碰撞是桥梁在地震中破坏的主要因素之一。随着抗震研究的进展,限位装置在桥梁中的应用研究也越来越多,但是以往的研究多局限于普通限位缓冲装置使用效果的定性研究,没有考虑具有耗能性能的装置的缓冲效果。该研究在试验的基础上提出了基于反应谱方法的具有耗能性能的圆筒型限位缓冲装置计算模型和设计方法,并采用动力时程分析方法对设计效果进行验证。研究表明圆筒型缓冲装置具有明显的缓冲效果,本设计方法是可行的,与普通缓冲装置相比,梁体与挡块之间的最大相对位移以及桥墩的塑性变形均有不同程度的减小。

 
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