Research on the Dynamic Properties of One Four-tower Cable-Stayed Bridge Under Various Constraint Systems
LI Zhishan
CHEN Weiming
Abstract：Based upon the design plan of a four-tower cable-stayed bridge for Qiongzhou Strait Bridge,the paper investigates its modal properties as well as its elastic seismic responses under various pylon-girder constraint systems.In terms of the seismic analysis,different seismic waves with various frequency contents may influence bridge models differently,and then inconsistent conclusions can be drawn for the cable-stayed bridge under those constraint systems.In general,the dynamic performance of bridge with total floating system is better than bridge with semi-floating system,but compared with pylon-girder longitudinal constraint systems,it has larger girder and pylon longitudinal displacement;the system with all pylons constrained by girder has superior dynamic performance than partial constraint systems,also it has the highest constraint on girder displacement.But compared with floating system,the forces in pylons and the vertical displacement of girder are larger.
Keywords：Four-tower cable-stayed bridgeConstraint systemDynamic propertySeismic response
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 84-90 )