【摘要】 针对自锚式悬索-斜拉组合体系桥梁施工期存在的诸多影响结构安全的问题,以实桥工程为依托,采用层次分析法,进行施工期结构风险识别,根据风险识别结果,基于BP网络的失效概率法,根据主要风险模式和风险因素,建立主要风险模式下的结构极限状态方程,得到各个施工阶段的失效概率,确定结构的目标可靠度。更多还原

【Abstract】 Aiming at safty factors of self-anchored suspension and cable-stayed combination system bridge during the construction period,the construction risk identification is investigated using analytic hieratchy process.According to risk identification results limit state equations can be obtained under the condition of main risk model based on failure probability method of BP network,and the failure probabilities are got at construction stage.Then target reliability of self-anchored suspension and cable-stayed combination system bridge can be determined.更多还原