摘要
对活性粉末混凝土疲劳试验实测资料进行分析,提出铁路活性粉末混凝土桥梁疲劳验算中混凝土相关疲劳可靠性设计参数取值。编制程序计算多种跨度简支梁在客运专线疲劳列车作用下标准荷载效应比频谱,给出不同跨度简支梁中活性粉末混凝土等效重复应力换算系数。对32m预应力活性粉末混凝土桥梁承载能力极限状态可靠指标进行分析,给出建议的活性粉末混凝土桥梁疲劳设计目标可靠指标和设计验算表达式。
The fatigue test data of reactive powder concrete（RPC） were analyzed and on this basis the parameters for fatigue assessment of railway prestressed RPC bridges were determined.The program was formulated to calculate the standard spectrum of loading effect ratio of simply supported girders with different spans under fatigue loading on passenger dedicated lines,and the conversion coefficients of equivalent repeated stresses of RPC were obtained.The limit state of the bearing capability of a 32 m prestressed RPC bridge was checked.The target reliability index and the checking expressions for fatigue design of RPC bridges were given.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2012年第3期94-98,共5页
Journal of the China Railway Society
基金
国家自然科学基金资助项目(50778021)
关键词
客运专线
活性粉末混凝土
疲劳可靠性
可靠指标
passenger dedicated line
reactive powder concrete（RPC）
fatigue reliability
reliability index
