Performance based durability design, carbonation part 1 – Benchmarking of European present design rules
Performance based durability design, carbonation part 1 – Benchmarking of European present design rules
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基于性能的耐久性设计，碳化部分 1 – 欧洲现行设计规则的基准测试
DOI：
10.1002/suco.201600066
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发表时间：
2016
影响因子：
3.2
通讯作者：
C. Gehlen
中科院分区：
文献类型：
--
作者：
S. Greve;C. Gehlen
该文件报告了欧洲视为满足暴露等级XC（碳化暴露结构构件）规则的基准。描述性规则的基准是根据[1]中开发的碳化腐蚀概率设计方法进行的，并分别在fib公告34：使用寿命设计模型规范（2006）[2]和fib混凝土结构模型规范2010 [3]中采用。为了进行代表性研究，选择了三组欧洲国家，代表欧洲的不同部分，南欧（西班牙、葡萄牙）、中欧（荷兰、英国和德国）和北方（丹麦、挪威）。在暴露等级XC2、XC3和XC4 [4]中，计算了“有利”和“不利”设计情况下碳化诱导钢筋去钝化的可靠性范围。在每种设计情况下，都遵循选定国家的视为满足规则。概率计算主要基于短期碳酸化数据。然而，一些计算也是基于长期观察。后者是为独立验证目的而实施的。计算出的可靠性范围非常广泛，在某些“不利”情况下，视为满足要求并不能保证特定暴露所需的极限状态（LS）目标可靠性。在“有利”的情况下，不那么严格的要求就足够了。
The paper reports on a benchmark of European deemed‐to‐satisfy rules for exposure class XC (carbonation exposed structural members). The benchmark of the descriptive rules was carried out following the probabilistic design approach for carbonation‐induced corrosion developed in [1] and adopted in fib bulletin 34: Model Code for Service Life Design (2006) [2] and fib Model Code for Concrete Structures 2010 [3], respectively. To perform a representative study, three groups of European countries were selected, representing different parts of Europe, south (Spain, Portugal), middle (Netherlands, Great Britain and Germany) and northern Europe (Denmark, Norway). Reliability ranges for carbonation‐induced depassivation of rebar were calculated for ”favourable“ and ”unfavourable“ design situations in exposure classes XC2, XC3 and XC4 [4]. In each design situation the deemed‐to‐satisfy rules of selected countries were followed. The probabilistic calculations were mainly based on short‐term carbonation data. However, some calculations were also based on long‐term observation. The latter was implemented for independent validation purposes. The calculated reliability ranges are very broad and in some ”unfavourable“ situations, the deemed‐to satisfy requirements do not guarantee the required limit state (LS) arget reliabilities for the particular exposure. In ”favoura‐ble“ situations less stringent demands would have been sufficient.