混凝土受弯构件挠度控制可靠度分析

发布时间：2018-01-10 01:00

本文关键词：混凝土受弯构件挠度控制可靠度分析　出处：《建筑结构学报》2017年09期 　论文类型：期刊论文

【摘要】：挠度控制是混凝土受弯构件正常使用极限状态设计中的重要内容,已有研究对混凝土受弯构件挠度控制的可靠度水平进行了分析和验证,但所采用的分析方法存在理论上的缺陷,且大多是以个别典型情况为例验证挠度控制的可靠度水平。为准确地揭示混凝土受弯构件挠度控制的可靠度水平,采用无量纲形式系统分析了各种情况下混凝土受弯构件挠度控制的可靠度水平,并分析了主要影响因素。结果表明,GB 50153—2008《工程结构可靠性设计统一标准》对钢筋混凝土受弯构件、不允许出现裂缝的预应力混凝土受弯构件的可靠度控制较为适中,对允许出现裂缝的预应力混凝土受弯构件的控制略显保守,可适当调整。可变作用效应的相对数值对构件挠度控制的可靠度影响显著,且可变作用效应相对越大,挠度控制的可靠度水平越高。
[Abstract]:Deflection control is an important content of concrete flexural members in serviceability limit state design, several studies have been conducted to analyze and verify the concrete flexural deflection control reliability level, but the analysis method has the defects of the theory, and most of them are based on individual cases as an example to verify the reliability of the horizontal deflection control to accurately reveal the concrete flexural deflection control reliability level, the dimensionless form system of bending deflection control of concrete under various conditions by the reliability level, and analyzed the main influencing factors. The results showed that GB 50153 2008< engineering structural reliability design standard > of reinforced concrete bending component, reliability control does not allow cracks of Prestressed concrete flexural member is moderate, allowed in the cracks of Prestressed Concrete Flexural Members The control is slightly conservative and can be adjusted appropriately. The relative value of variable action effect has a significant effect on the reliability of component deflection control, and the larger the variable effect is, the higher the reliability level of deflection control.

【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51278401)
【分类号】：TU37
【正文快照】： 0前言在GB 50153—2008《工程结构可靠性设计统一标准》中,对正常使用极限状态设计采用以结构可靠度理论为基础的近似概率极限状态设计方法[1]。在具体应用过程中,对混凝土受弯构件挠度控制的可靠度水平进行了分析和验证,但对以准永久值参与的组合作用,均采用随机变量组合方法

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