Study on Collapse-proof Effect and Parametric Design of Cable-Unseating Prevention Devices

摘要

The collapse-proof effect of unseating prevention devices are influenced by the design parameters under earthquake. Combine with existing relational design standards of unseating prevention devices at home and abroad, the dynamical analysis has been used to get the seismic response of bridges with different parameter cable-unseating prevention devices. The influence of design parameters on the collapse-proof effect and internal force of unseating prevention devices are been analyzed. The result show that the unseating prevention devices can play the role to proof the collapse, and it can enhance the anti-pushing rigidity and integrity of structure. The effect of collapse-proof decrease as the cable length and primary clearance increase, the internal force of unseating prevention devices is larger than the design bearing capacity while the parameters are both smaller, even some has exceed its yield tension.