Petroleum Science >2013, Issue 3: 373-384 DOI: https://doi.org/10.1007/s12182-013-0285-2
A new bracing system for improvement ofseismic performance of steel jacket typeoffshore platforms with float-over-deck Open Access
文章信息
作者：Behrouz Asgarian and Hamed Rahman Shokrgozar
作者单位：
Department of Civil Engineering, K. N. Toosi University of Technology, No. 1346, Valiasr Street, Mirdamad Intersection 19967, P.O. Box. 15875-4416, Tehran, Iran;Department of Civil Engineering, K. N. Toosi University of Technology, No. 1346, Valiasr Street, Mirdamad Intersection 19967, P.O. Box. 15875-4416, Tehran, Iran
投稿时间：2012-05-20
引用方式：Asgarian, B. & Shokrgozar, H.R. Pet. Sci. (2013) 10: 373. https://doi.org/10.1007/s12182-013-0285-2
文章摘要
In this paper, the seismic response of a newly designed steel jacket offshore platform with
a float over deck (FOD) system in the Persian Gulf was investigated through incremental dynamic
analysis. Comparison of incremental dynamic analysis results for both directions of the platform shows
that the lateral strength of the platform in the float over direction is less than its lateral strength in other
direction. Dynamic characteristics measurement of a scale model of platform was also performed
using forced vibration tests. From experimental measurement of the scaled model, it was observed
that dynamic characteristic of the platform is different in the float over direction compared to the other
direction. Therefore, a new offshore installed bracing system for the float over direction was proposed
for improvement of seismic performance of this type of platform. Finally, the structure with the modified
system was assessed using the probabilistic seismic assessment method as well as experimental
measurement of its dynamic characteristics. It was observed that the proposed offshore installed bracing
system improves the performance of platforms subjected to strong ground motion.
a float over deck (FOD) system in the Persian Gulf was investigated through incremental dynamic
analysis. Comparison of incremental dynamic analysis results for both directions of the platform shows
that the lateral strength of the platform in the float over direction is less than its lateral strength in other
direction. Dynamic characteristics measurement of a scale model of platform was also performed
using forced vibration tests. From experimental measurement of the scaled model, it was observed
that dynamic characteristic of the platform is different in the float over direction compared to the other
direction. Therefore, a new offshore installed bracing system for the float over direction was proposed
for improvement of seismic performance of this type of platform. Finally, the structure with the modified
system was assessed using the probabilistic seismic assessment method as well as experimental
measurement of its dynamic characteristics. It was observed that the proposed offshore installed bracing
system improves the performance of platforms subjected to strong ground motion.
关键词
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Steel jacket type offshore platform, float-over deck, mean annual frequency, force vibrationtest, seismic performance, dynamic characteristics