影响钢筋砼简支梁桥承载能力可靠指标参数的量化分析  

IMPACT EXTENT OF PARAMETERS ON RELIABILITY INDEX OF BEARING CAPACITY OF REINFORCED CONCRETE SIMPLY SUPPORTED BEAM BRIDGE

作　　者：李丽芬[1] 吕宗让 王佳梅 

机构地区：[1]东北林业大学,哈尔滨150040 [2]黑龙江省公路局

出　　处：《东北林业大学学报》1996年第2期53-58,共6页Journal of Northeast Forestry University

基　　金：黑龙江省交通厅横向课题

摘　　要：用结构可靠性理论探讨了影响钢筋砼简支梁桥上部结构承载能力可靠指标的主要参数,并用电算程序定量地分析了它们的影响程度。计算结果表明,除了荷载及某些不便于自行确定的统计参数外,对可靠指标影响较大的依次是截面有效高度、不定性系数、钢筋截面面积、钢筋抗拉设计强度及砼轴心抗压设计强度。This paper probes into main parameters of reliability index that affect bearing capacity of upper structure of reinforced concrete simply supported beam bridge with the theory of structure reliability,and quantitatively analyzes their impact extent using electron programme.The result shows that the parameters impacting fairly big on reliability index in turn are the effective height of cross section and its unsteady coefficient,the area of reinforcing steel section,the extensive designed strength of the reinforcing bar,the compressive designed strength of the concrete,except the load and some statistical parameters which be inconveniently fixed by oneself.

关 键 词：钢筋混凝土 简支梁桥 承载力 可靠指标 旧桥评估 

分 类 号：U446.3[建筑科学—桥梁与隧道工程]