Transverse Seismic Design and Analysis of an H Type Bridge Tower Cable Stayed Bridge
Xu Yan, Ji Dongbing and Wang Ruilong
DOI:10.11835/j.issn.1674-4764.2014.06.001
Received July 23, 2014,Revised , Accepted , Available online July 01, 2015
Volume ,2014,Pages 1-7
- Abstract
According to our current bridge seismic design codes, the bridge tower is explicitly required to remain almost elastic even under the excitation of occasionally happened earthquake. To achieve this seismic performance objective, usually the steel ratios of tower base and strut are required to satisfy the static loading demand and increase by a large margin as well in most engineering practices which leads to engineering inefficiency as well as a rising seismic demand for the substructure. Therefore, the structural design parameters including the location, the stiffness and the constrain condition of the strut with respect to the tower column of H shape tower were studied to explore their effect on the transverse seismic responses of cable-stayed bridge tower, Moreover, the effect of yield intensity of the strut on the seismic responses of the tower column is also studied. The results show that the location and the stiffness of the strut have a slight effect on the seismic responses while the transverse seismic demands of the bridge tower decrease drastically when the constrain condition between the cross beam and the tower column changes.