连续梁桥确定性及可靠性对比分析

摘要

针对分别采用《公路钢筋混凝土及预应力混凝土桥涵设计规范》（JTG D62-2004）和《公路钢筋混凝土及预应力混凝土桥涵设计规范》（JTJ 023-85）设计的预应力混凝土连续梁桥进行确定性和可靠性对比分析，通过有限元程序对成桥阶段选取的典型截面可靠指标进行计算。结果表明，确定性分析和可靠性分析结果有不同的规律，不能单从确定性分析结果的大小来判断结构安全储备，需将确定性分析与可靠性分析相结合，才能对结构有合理准确的判断与评价。%The object of this paper is to study the deterministic and reliability analysis of the pre-stressed concrete continuous girder bridges designed on the Codes for Design of Highway Reinforced Concrete and Pre-stressed Concrete and Culverts (JTG D62-2004) and (JTJ 023-85). The results of typical selected cross sections show that the different regularities exist in the deterministic and reliability analysis, which indicates that accuracy and reasonable assessment of structural safety statement must be based on the combination of deterministic and reliability analysis.