X型斜撑在海洋平台储备强度中的作用

Effect of X-Brace on Strength Reservation of the Offshore Platform

阐述了平台结构倒塌分析的原理及评定结构安全性能的指标，并以某项目中四腿导管架平台为例，假设了平台结构在地震作用下破坏前后的三种模型，用SACS软件对其进行结构倒塌的全过程分析。通过对比分析三个模型倒塌时X型斜撑节点的储备强度比值及倒塌形式，评估X型斜撑的作用。

The theory of collapse analysis and the index of evaluating the security performance of the structure are presented in this paper. Taking a four-leg jacket platform as an example, it is assumed of three models of the X-brace joint failure in the earthquake, the whole collapse process of which is analyzed by SACS software. The effect of X-brace is evaluated through comparing and analyzing the ratio strength reservation of the X-brace joint as well as collapse form at the time when three models collapse.