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Analysis of behavior of melted dark green silty soil

TANG Yiqun, ZHOU Nianqing, YANG Ping, SHEN Feng

《结构与土木工程前沿（英文）》 2008年第2卷第3期页码 242-245 doi: 10.1007/s11709-008-0022-x

摘要： The behavior of dark green silty soil of the 6th storey is studied by means of scanning electron microscopy (SEM). The shape, size and contact condition of the basic elements of the soil microstructure, and the shape and the size of the pore are further studied. In addition, a comparative study is made to analyze the experiment results of Cu and dynamic test. The mechanic characteristics of common soil and those of melted soil are presented and their influences on dark silty soil after being frozen are theoretically illustrated from a microscopic perspective.

关键词： electron microscopy mechanic microscopic perspective addition dynamic

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A comparative study of the mechanical properties, fracture behavior, creep, and shrinkage of chemically based self-consolidating concrete

Mahdi AREZOUMANDI, Mark EZZELL, Jeffery S VOLZ

《结构与土木工程前沿（英文）》 2014年第8卷第1期页码 36-45 doi: 10.1007/s11709-014-0243-0

摘要： This study presents the results of an experimental investigation that compares the mechanical properties, fracture behavior, creep, and shrinkage of a chemically-based self-consolidating concrete (SCC) mix with that of a corresponding conventional concrete (CC) mix. The CC and SCC mix designs followed conventional proportioning in terms of aggregate type and content, cement content, air content, water-cementitiuos materials ( / ) ratio, and workability. Then, using only chemical admixtures, the authors converted the CC mix to an SCC mix with all of the necessary passing, filling, flowability, and stability requirements typically found in SCC. The high fluidity was achieved with a polycarboxylate-based high-range water-reducing admixture, while the enhanced stability was accomplished with an organic, polymer-based viscosity-modifying admixture. The comparison indicated that the SCC and CC mixes had virtually identical tensile splitting strengths, flexural strengths, creep, and shrinkage. However, the SCC mix showed higher compressive strengths and fracture energies than the corresponding CC mix.

关键词： admixture conventional concrete (CC) creep fracture mechanic mechanical Properties self-consolidating concrete (SCC) shrinkage

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新型20 m桥梁检测车结构的有限元力学分析

沈意平,何福泉,王送来,张田

《中国工程科学》 2010年第12卷第9期页码 107-112

摘要：

针对设计的新型20 m桥梁检测车，利用Pro/E软件建立了4种工况下整车结构的实体模型，运用有限元软件ANSYS对建立的模型进行了静力和模态分析。开展对设计结构进行强度校核，找出了设计结构的危险部位，并综合分析结果提出了设计结构的加强建议。有限元力学分析为校核结构强度提供了重要的理论方法，分析结果为桥梁检测车的结构设计与实际生产提供了理论依据与技术支持。

关键词：桥梁检测车有限元静力模态强度