张力腿基础设计参数对大跨度浮式悬索桥行车动力响应的影响

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中图分类号：U44 文献标志码：A 文章编号：2096-6717（2025）03-0201-（

Influence of the tension leg platform's design parameters on the dynamic response of a long-span floating suspension bridge under vehicle loading

BAI Zhiyu1，WEI Kai'，ZHANGFeng²，ZHANGZeduan1 （1.StateKeyLaboratoryofBridge Inteligentand Green Construction，SouthwestJiaotong University，Chengdu 611756，P.R. China; 2.Nanchang Urban Planning and Design Research Institute Group Co.，Ltd.，Nanchang 330038，P.R.China）

Abstract： Construction schemes for long-span floating suspension bridges based on tension leg platforms have high application prospects in high water depth and soft soil environments.Due to their low foundation stifness， vehicle loads may induce significant vibrations in bridges.This phenomenon can be mitigated by adjusting the parameters of the tension leg platform.So，there is limited research on this novellong-span floating bridge under vehicle loads.However，the feasibilityand applicability of such schemes need validation.This paper utilized finite element software to compute the response of a floating suspension bridge model under the vehicle load. The effect of changes in the submerged depth and cable inclination angle on the response was investigated using methods such as modal analysis. The study revealed that adjusting the parameters of the submerged depth and cable inclination angle primarily alters the first two vibrational modes，significantly affcting the lateral responses.Increasing the submerged depth of the platform and adding inclined tension leg cables effectively reduced vibrations under the vehicle load.Additionally，the optimal modification of the cable inclination angle requires specific analysis.Therefore，during the design phase，the relevant tension leg platform design parameters are crucial forfinding the most suitable configuration，which canenhance the overallfeasibility and applicability of floating bridges under the vehicle load.

Keywords：long-span floating suspension bridge；vehicle load；tension leg platform；design parameters; dynamic response characteristics

随着沿海地区经济的高速发展，深水浮式桥梁设计开始在水深较深、海底土质较软的地理环境下展现出较大的应用优势，特别是以张力腿平台（TLP）以及SPAR平台等深水浮式平台为基础的大跨度浮式桥梁拥有了越来越广泛的应用前景[]。（剩余12167字）