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冻结法工程施工中冻胀和融沉问题的分析与研究 被引量:6
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作者 徐敏生 龚启昌 《工程勘察》 CSCD 北大核心 2009年第S2期85-88,共4页
本文主要讨论地下土木工程中使用冻结法施工引起的冻胀和融沉工程问题,从岩土工程的角度介绍冻结土的形成及其工程力学性质。较为全面的阐述冻结土的岩土工程设计及施工特点。
关键词 冻结土 融沉 冻涨 措施 工程力学性能
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反复荷载作用下的异形柱框架滞回性能 被引量:9
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作者 王铁成 李新华 +1 位作者 王天柱 康谷贻 《吉林大学学报(工学版)》 EI CAS CSCD 北大核心 2007年第1期224-228,共5页
基于一榀三层两跨的异形柱钢筋混凝土框架结构拟静力试验,研究了异形柱框架的抗震性能,分析了反复荷载作用下异形柱框架的滞回曲线,并根据顶层滞回曲线得到骨架曲线及相应的恢复力模型和异形柱框架结构的强度、刚度退化等性能。试验结... 基于一榀三层两跨的异形柱钢筋混凝土框架结构拟静力试验,研究了异形柱框架的抗震性能,分析了反复荷载作用下异形柱框架的滞回曲线,并根据顶层滞回曲线得到骨架曲线及相应的恢复力模型和异形柱框架结构的强度、刚度退化等性能。试验结果表明:异形柱框架结构刚度退化不明显,抗震性能良好;由试验计算得到的框架恢复力模型可为工程设计和非线性有限元分析提供参考。 展开更多
关键词 工程力学 异形柱 框架 滞回性能 恢复力
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Interactions between engineered nanoparticles and dissolved organic matter: A review on mechanisms and environmental effects 被引量:14
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作者 Sujuan Yu Jingfu Liu +1 位作者 Yongguang Yin Mohai Shen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第1期198-217,共20页
Dissolved organic matter(DOM) is ubiquitous in the environment and has high reactivity.Once engineered nanoparticles(ENPs) are released into natural systems, interactions of DOM with ENPs may significantly affect ... Dissolved organic matter(DOM) is ubiquitous in the environment and has high reactivity.Once engineered nanoparticles(ENPs) are released into natural systems, interactions of DOM with ENPs may significantly affect the fate and transport of ENPs, as well as the bioavailability and toxicity of ENPs to organisms. However, because of the complexity of DOM and the shortage of useful characterization methods, large knowledge gaps exist in our understanding of the interactions between DOM and ENPs. In this article, we systematically reviewed the interactions between DOM and ENPs, discussed the effects of DOM on the environmental behavior of ENPs, and described the changes in bioavailability and toxicity of ENPs caused by DOM. Critical evaluations of published references suggest further need for assessing and predicting the influences of DOM on the transport,transformation, bioavailability, and toxicity of ENPs in the environment. 展开更多
关键词 Dissolved organic matter engineered nanoparticles Interaction mechanisms Environmental behavior Toxicity Bioavailability
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