| 黄培彦*,廖忻,周昊,陈钟松.湿热环境下钢纤维聚合物结构混凝土疲劳性能的实验研究[J].实验力学,2015,30(3):269~274 |
| 湿热环境下钢纤维聚合物结构混凝土疲劳性能的实验研究 |
| Experimental Study of Fatigue Performance of Steel Fiber Polymer Structural Concrete in Hot-Wet Environment |
| 投稿时间：2014-12-31 修订日期：2015-03-30 |
| DOI：10.7520/1001-4888-14-266 |
| 中文关键词: 钢纤维聚合物结构混凝土 湿热环境 疲劳性能 |
| 英文关键词:steel fiber polymer structural concrete (SFPSC) hot-wet environment fatigue performance |
| 基金项目:国家自然科学基金重点项目(编号：11132004)、广东省交通运输厅科技计划项目(编号：科技-2013-02-028) |
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| 中文摘要: |
| 为改善普通高强混凝土的抗裂及耐久性能,本课题组研发了一种新型钢纤维聚合物结构混凝土(SFPSC),并应用于大跨度桥梁上部结构。为了进一步探讨该类新材料的环境疲劳/耐久性能,考虑我国南方和沿海地区桥梁服役时的湿热环境影响,设计了不同的湿热条件(室温大气环境、50℃和80%R·H、50℃和90%R·H)对SFPSC试件进行预处理后,实施了三点弯曲疲劳实验,获得了SFPSC的应力-疲劳寿命(S-N)曲线,并给出了其疲劳方程。研究结果表明,湿热环境对SFPSC的疲劳性能影响较大,高温高湿会导致其疲劳寿命降低。 |
| 英文摘要: |
| In order to improve cracking resistance and durability of ordinary high strength concrete, a new material named “steel fiber polymer structural concrete (SFPSC)” was developed by this research group and is already applied in the superstructure of large-span bridge. In order to get further insight into the fatigue/durability properties of this new material in hot-wet environment in the southern parts and coastal areas of China, different hot-wet environmental conditions were designed (room temperature & atmospheric environment, 50℃ & 80% R·H, 50℃ & 90% R·H etc.), and three-point bending fatigue experiment was carried out for SFPSC specimens subjected to pretreatment. Stress-fatigue life (S-N) curve and fatigue equation of SFPSC were obtained. Results show that hot-wet environment has great effect on fatigue properties and durability of SFPSC, and high temperature and humidity can lead to fatigue life reduction. |
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