Sensitivity analysis on dynamic characteristics of self-anchored suspension bridge with super-wide girder

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1 JOURNAL OF SOUTHEAST UNIVERSITY Natural Science Edition Vol 46 No Mar 016 DOI /j issn Hz U448 5 A Sensitivity analysis on dynamic characteristics of self-anchored suspension bridge with super-wide girder Xia Zhiyuan 1 Li Aiqun 1 Li Jianhui 3 Duan Maojun 3 1 School of Civil Engineering Southeast University Nanjing China Beijing University of Civil Engineering and Architecture Beijing China 3 School of Civil Engineering Nanjing Forestry University Nanjing China Abstract To study the sensitivity of the dynamic characteristic of self-anchored suspension bridges with super-wide concrete girders to around circumstances the influences of the dead load intensity the environmental temperature and the support subsidence on the dynamic characteristic were analyzed by using the method combining nonlinear finite element and subspace iteration The results show that the first-order frequency is Hz in the finished state and the vertical vibration mode plays a leading role but the longitudinal floating mode appears late because of the large constraints to girders in the direction Due to the influence of the super-wide section on the torsion rigid which should be taken into account in the following analysis the torsion mode emerges early with mode coupling All structural frequencies are sensitive to the dead load intensity but not to the support subsidence The frequencies of the vertical bending of the girder are sensitive to the temperature but those related to transverse vibration are not It is suggested that the effects of the dead load intensity and the environmental temperature should be considered in field tests of dynamic characteristics Key words self-anchored suspension bridge dynamic characteristics subspace iteration method sensitivity analysis super-wide section aiqunli@ seu edu cn Y03 1KJB CE J DOI /j issn

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5 / j issn Zhang Hongbin Kong Xianjing Zhang Zhe Research on dynamic performance of self-anchored suspension bridge J Journal of Highway and Transportation Research and Development DOI /j issn in Chinese 9 J Wang Yutian Ma Zongzhi Jiang Fuxiang Study of dynamic characteristics of single-tower self anchored suspension bridges with spatial cables J Bridge Construction in Chinese f 1 ~ f 4 10 J DOI / j issn Zhao Zhuo Zhang Zhe Liu Dongxu Analysis of dynamic performance of main bridge of self-anchored suspension bridge J World Earthquake Engineering DOI /j issn in Chinese 11 References M Ochsendorf J A Billington D P Self-anchored suspension bridges J Journal of Bridge Engineering Kamei M Maruyama T Tanaka H Konohana bridge Japan J Structural Engineering International Sun J Manzanarez R Nader M Suspension cable design of the new san francisco-oakland bay bridge J Journal of Bridge Engineering gated steel webs J Bridge Construction J in Chinese 53 DOI /j issn Feng Shuo Xiang Yiqiang Xie Xu et al Study of dynamic behavior and influences induced by structural pa- J Kang Juntao Yuan Min Wang Tongmin Parametric analysis of dynamic performance of completion state of rameter variations of self-anchored suspension bridge J World Bridges DOI /j issn in Chinese 6 Abdel-Ghaffar A M Free lateral vibrations of suspension bridges J Journal of the Structural Division West H H Suhoski J E Geschwindner L F Jr Natural frequencies and modes of suspension bridges J Journal of Structural Engineering DOI / ASCE J DOI 10 J Song Xuming Dai Gonglian Zeng Qingyuan Seismic response analysis and control of self-anchored suspension bridge J Journal of Central South University Science and Technology in Chinese 1 J Chen Shuisheng Zhang Xiaoguang Gui Shuirong Parametric analysis of dynamic characteristics of multicell single-box composite box girder bridge with corru- long span self-anchored suspension bridge J Bridge Construction in Chinese 14 - J Sun Jun Li Aiqun Ding Youliang et al Research on correlation of modal frequency and seasonal temperature of Runyang Suspension Bridge J Engineering Mechamics in Chinese 15 M http / /journal seu edu cn

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