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- W2357391257 abstract "Proper structural failure patterns are a critical aspect for ensuring structures to survive under earthquake loading.However,the studies on seismic failure patterns of structures and their control,especially for super-long-span cable-supported bridges,are rarely reported in literatures.In this paper,elasto-plastic analyses are carried out to investigate seismic damage and failure patterns of the lateral constraint system by employing seismic damage indices for a trial-designed cable-stayed bridge that has a central span of 1400mand is excited by various ground motion intensities.Damage control strategies were implemented by mounting viscous dampers between the pylons and the girder as well as between the piers and the girder,which are expected to reduce the damage of structure and improve the capacity of collapse resistant.The influences of the damper allocations and coefficients on structural damages and failure patterns were studied under extremely ground motion(Peak Ground Motion Acceleration(PGA)=1.0g)in lateral direction of the bridge.In addition,the influence of the stiffness of the supporting piers on structural seismic performance was also investigated.The effects of stiffness and energy dissipation capacity of the cross beam of the pylon are further discussed.Moreover,damage control counter measure installing energy dissipation components between the pylon legs is presented.The results show that the top and bottom regions of the pylon are simultaneously subjected to damage under extremely earthquake,indicating a failure pattern of double plastic hinges.The damage control strategies with additional dampers can effectively reduce the damage of piers;however,it is ineffective to reduce the damage of towers.The energy dissipation components installed in the region of the upper pylon legs is shown to be capable of improving the failure pattern of the pylon;thus the damage control targets based on seismic damage indices could be reached." @default.
- W2357391257 created "2016-06-24" @default.
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- W2357391257 date "2013-01-01" @default.
- W2357391257 modified "2023-09-27" @default.
- W2357391257 title "Seismic failure patterns and damage control of super-long-span cable-stayed bridges in lateral direction" @default.
- W2357391257 hasPublicationYear "2013" @default.
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