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箱形截面钢桥墩广泛地用于高架桥中 ,通常 ,这些箱形截面的钢板具有较高的宽厚比 ,这就使得桥墩在大地震时很容易遭到破坏。为了改善这种钢桥墩的抗震性能 ,提出了一种通过能量被局部构件吸收的方法来提高整个结构的抗震能力 ,即把地震灾害控制在一些事先设计好的薄弱构件中 ,地震时 ,通过这些构件的破坏来吸收能量。在研究中 ,粘附于钢桥墩的低屈服点钢板被设计为薄弱构件 ,在地震时 ,通过低屈服点钢板的屈服来吸收能量 ,并保持桥墩一直为弹性。研究了低屈服点钢板的耗能特性 ,并提出了优化设计方法。这种新的设计概念及方法同样适合于房屋、厂房及高耸结构抗震设计。
Box girders are widely used in viaducts. Usually, these box-section steel plates have a high aspect ratio, which makes the pier vulnerable to damage during a major earthquake. In order to improve the seismic performance of the steel piers, a method is proposed to improve the seismic resistance of the whole structure by absorbing the energy by the local components, that is, to control the earthquake disaster in some well-designed weak components. In the earthquake, Destruction of components to absorb energy. In the study, the low yield point steel plate attached to the steel piers was designed as a weak member, absorbing energy through yielding of the low yield point plate during earthquakes and keeping the piers resilient all the time. The energy dissipation characteristics of low yield point steel were studied and the optimal design method was proposed. This new design concept and method are also suitable for seismic design of houses, factories and towering structures.