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机构地区:[1]广西大学土木建筑工程学院
出 处:《广西工学院学报》2006年第3期36-40,共5页Journal of Guangxi University of Technology
基 金:广西自然科学基金资助项目(桂科自:0066002);广西自然科学基金资助项目(桂科自0481002)
摘 要:用有限元理论分析碳纤维增强材料(CFRP)约束混凝土梁的加固效应,并与试验结果比较,结果表明通过合理选择有限元分析数值模型,可较好地模拟CFRP布约束混凝土梁的受力性能,在此基础上进一步对CFRP约束的混凝土梁的受力进行非线性仿真分析,论证CFRP加固混凝土梁的优化设计问题。Catalyzed by triethy lamine, vitamin E acetate was synthesized with vitamin E and acetic anhydride. The effects of reaction conditions such as molar ratio of vitamin E and acetic anhydride, the amount of catalyst, reaction time and temperature on the synthesis were studied. Uniform design was used to optimize the synthesis. The optimum conditions were determined as follows, the molar ratio of vitamin E and acetic anhydride was 1 : 1. 6, the amount of catalyst was 0. 13ml, the reaction time was 5hr, and the reaction temperature was the 55℃, conversion of vitamin E acetic was 95.4%.
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