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논문 기본 정보

자료유형
학술저널
저자정보
Xin-Jun Zhang (Zhejiang University of Technology) Cong Yu (Zhejiang University of Technology) Jun-Jie Zhao (Zhejiang University of Technology)
저널정보
국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.72 No.1
발행연도
2019.1
수록면
99 - 111 (13page)

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To investigate the seismic performance of long-span partially earth-anchored cable-stayed bridge, a super long-span partially earth-anchored cable-stayed bridge scheme with main span of 1400m is taken as example, structural response of the bridge under E1 seismic action is investigated numerically by the multimode seismic response spectrum and time-history analysis, seismic behavior and also the effect of structural geometric nonlinearity on the seismic responses of super long-span partially earth-anchored cable-stayed bridges are revealed. The seismic responses are also compared to those of a fully self-anchored cable-stayed bridge with the same main span. The effects of structural parameters including the earth-anchored girder length, the girder width, the girder depth, the tower height to span ratio, the inclination of earth-anchored cables, the installation of auxiliary piers in the side spans and the connection between tower and girder on the seismic responses of partially ground-anchored cable-stayed bridges are investigated, and their reasonable values are also discussed in combination with static performance and structural stability. The results show that the horizontal seismic excitation produces significant seismic responses of the girder and tower, the seismic responses of the towers are greater than those of the girder, and thus the tower becomes the key structural member of seismic design, and more attentions should be paid to seismic design of these sections including the tower bottom, the tower and girder at the junction of tower and girder, the girder at the auxiliary piers in side spans; structural geometric nonlinearity has significant influence on the seismic responses of the bridge, and thus the nonlinear time history analysis is proposed to predict the seismic responses of super long-span partially earth-anchored cable-stayed bridges; as compared to the fully self-anchored cable-stayed bridge with the same main span, several stay cables in the side spans are changed to be earth-anchored, structural stiffness and natural frequency are both increased, the seismic responses of the towers and the longitudinal displacement of the girder are significantly reduced, structural seismic performance is improved, and therefore the partially earth-anchored cable-stayed bridge provides an ideal structural solution for super long-span cable-stayed bridges with kilometer-scale main span; under the case that the ratio of earth-anchored girder length to span is about 0.3, the wider and higher girder is employed, the tower height-to-span ratio is about 0.2, the larger inclination is set for the earth-anchored cables, 1 to 2 auxiliary piers are installed in each of the side spans and the fully floating system is employed, better overall structural performance is achieved for long-span partially earth-anchored cable-stayed bridges.
#super long-span partially earth-anchored cable-stayed bridge #seismic performance #multimode seismic response spectrum analysis #time-history analysis #structural parameters

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참고문헌 (19)

참고문헌 신청
Alvanitopoulos, P. F. / 2010 / Interdependence between damage indices and ground motion parameters based on Hilbert–Huang transform / Measurement Sci. Technol. 21(2) Crossref Chen, X. / 2013 / Approximate calculation of nature frequency of partially earth-anchored cable-stayed bridges / Chinese Quarterly Mech 34(4):650~655 google schola Gimsing, N. J. / 2012 / Cable-Supported Bridges: Concept and Design / John Wiley and Sons Ltd google schola Zhibin Jin / 2016 / Partially Earth-Anchored Cable Bridge: Ultralong-Span System Suitable for Carbon-Fiber-Reinforced Plastic Cables / Journal of Bridge Engineering 21(6):06016003 Crossref 2007 / JTG D65-01, Guidelines for design of Highway Cable-stayed Bridge / Ministry of Communications google schola

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