海工构件耐久性的灰色关联评判

Durability assessment for marine concrete member by grey relational analysis

从氯离子渗透和钢筋锈蚀所引起的海工构件和耐久性失效出发,结合实际工程检测项目,合理选取耐久性关键参数构建最优序列集,划分与已有规范相对应的耐久性等级,利用两种改进的灰色关联分析法,即绝对关联度(ARA)和点、斜关联度(PSRA)方法,对海港工程构件的耐久性状况进行了评定。研究结果表明,ARA方法较适用于服役时间短而耐久性状态分化大的构件,PSRA方法兼顾了事物间相似性和相近性,等级划分明显,相对于ARA方法而言,它对构件耐久性状况的划分和耐久性等级的判断具有更好的适用性。

Two improved grey relational analysis methods, i.e.absolute relational analysis （ARA） and point-slope relational analysis （PSRA）, were used to assess the durability of marine concrete members based on in-situ tests, in which optimal serials were properly constructed from pro- ject-detected durability parameters and concrete durability grades were decided corresponding to existing codes.The results show that ARA is more preferred for short service-life member with large differentiation; While PSRA, due to taking both similarity and proximity into account, is available to identify the status of concrete structure member and classify its durability grade.