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盐冻环境下混杂纤维锂渣混凝土梁受弯承载力研究
Bending Bearing Capacity of Hybrid Fiber Lithium Slag Concrete Beam under Salt Freezing Environment
投稿时间:2019-04-04  修订日期:2019-07-01
DOI:103969/j.issn.1007 9629202004014
中文关键词:  混杂纤维  锂渣混凝土梁  盐冻损伤  纤维影响系数  受弯承载力
英文关键词:hybrid fiber  lithium slag concrete beam  salt freeze damage  fiber influence coefficient  bending bearing capacity
基金项目:国家自然科学基金资助项目(51568064)
        
作者单位
张广泰
ZHANG Guangtai
新疆大学建筑工程学院,新疆乌鲁木齐830047
School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
张晓旭
ZHANG Xiaoxu
新疆大学建筑工程学院,新疆乌鲁木齐830047
School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
田虎学
TIAN Huxue
新疆大学建筑工程学院,新疆乌鲁木齐830047
School of Architecture and Engineering, Xinjiang University, Urumqi 830047, China
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中文摘要:
      对经过盐冻循环后的混杂纤维锂渣混凝土梁进行抗弯加载试验,分析混杂纤维锂渣混凝土梁的盐冻损伤作用机理并探究其在盐冻作用下的抗弯性能.另外,基于现行规范中普通钢筋混凝土构件正截面受弯承载力的计算公式,引入纤维影响系数和以动弹性模量为参数的盐冻损伤系数对现行规范中的公式进行修正,得到了盐冻环境下混杂纤维锂渣混凝土梁的受弯承载力修正公式.将2种公式的计算结果进行对比后发现,修正公式的计算结果更接近试验值,可用于盐冻环境下混杂纤维锂渣混凝土受弯构件的分析和设计.
英文摘要:
      Through the bending loading test of hybrid fiber lithium slag concrete beam after salt freezing cycle, the mechanism of salt freezing damage of hybrid fiber lithium slag concrete beam was analyzed and its bending performance in salt freezing environment was investigated. Based on the calculation method of bending bearing capacity of ordinary reinforced concrete bending members in the current specification, the formula of fiber influence coefficient and salt damage coefficient with dynamic elastic modulus as parameter were used to modify the formulas in the specification, and the formula for calculating the bending bearing capacity of hybrid fiber lithium slag concrete beams under salt freezing was obtained. The calculated comparison results show that the results obtained by using the modified formula were closer to the experimental values than those calculated by the specification. Modified formula can be used for the analysis and design of the bending members of the hybrid fiber lithium slag concrete under the salt freezing environment.
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