The aseismic design of cable-stayed bridges in the transverse direction with newly proposed metallic dampers that can accommodate both longitudinal and transverse movement of the deck has recently been considered. This work focuses on developing a simplified method to design an appropriate metallic damper. The seismic performance of cable-stayed bridges with different damper stiffness, main span lengths, tower shapes and types of deck in the transverse direction are investigated. The transverse displacement of the deck of a cable-stayed bridge increases significantly with the increment of the damper stiffness, which proves that the design of the damper stiffness is crucial. A simplified model considering the damper stiffness, cable system and tower in the transverse direction is developed to evaluate the period and lateral displacement of a complicated cable-stayed bridge. Based on the simplified model, a design method is proposed and assessed using two cable-stayed bridges as examples. The results show that metallic dampers can be designed with high efficiency, and the optimal ductility of the damper can be selected.

中文翻译：

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斜拉桥横向使用金属阻尼器的简化设计方法

最近已经考虑了斜拉桥在横向方向上的抗震设计，该设计采用了新提出的金属减震器，该减震器可以适应甲板的纵向和横向运动。这项工作的重点是开发一种简化的方法来设计合适的金属阻尼器。研究了不同阻尼器刚度，主跨长度，塔形和横向甲板类型的斜拉桥的抗震性能。斜拉桥桥面的横向位移随着阻尼器刚度的增加而显着增加，这证明了阻尼器刚度的设计至关重要。考虑阻尼器刚度的简化模型，电缆系统和塔架在横向方向上的开发是为了评估复杂斜拉桥的周期和侧向位移。基于简化模型，提出了一种设计方法，并以两个斜拉桥为例进行了评估。结果表明，金属阻尼器可以高效设计，并且可以选择最佳的延性。