基于不同规范的悬臂施工连续梁桥确定性及可靠性对比分析

Analysis of Deterministic and Reliability for Continuous Girder Bridges Using Cantilever Construction Based on Different Codes

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)设计的悬臂施工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 con- tinuous girder bridges using the cantilever construction based on the Codes for Design of Highway Rein- forced 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 in- dicates that accuracy and reasonable assessment of structural safety statement must base on the combination of deterministic and reliability analysis, not the deterministic analyzing.