在役混凝土构件可靠度分析

Reliability Analysis of Existing Concrete Component

在役结构的现场检测是对结构可靠性评估的重要手段之一,以现有的研究成果来看,对在役结构评估时将结构的状态参数引入到结构的物理状态研究中尚不多见。基于以上考虑,为对在役结构可靠性作出客观评价,基于现场检测数据的处理,利用改进的一次二阶矩的可靠度分析方法,结合现行的混凝土结构设计规范,从正截面裂缝宽度角度对建筑工程中的受弯构件在均布荷载作用下的可靠性进行分析,并探讨其对构件可靠度的影响。

On-site detecting is one of the important means for reliability evaluation of the existing structure. According to the existing research results, the state parameters of structure to be used in the study on the structure＇s physical state are not very often in the evaluation of the exisiting structure. Taking what＇s above into consideration and to make an objective evaluation for the existing structure＇s reliability, this paper, based on the on-site detecting data processing, makes use of the improved first-order second- moment method, combined with current concrete structure design code, and analyzes the reliability of flexural component under the uniform load in the perspective of the normal section crack widths in building engineering. The influences of the crack width to component reliability are also discussed.