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软土固化增强复合外掺料研究
复合外掺料 软土
2009/10/30
采用水泥、外加剂和复合外掺料对温州软土进行固化试验，研究结果表明，在水泥中掺适当的工业废料及外加剂做加固土的固化剂，不仅较显著地增加加固土的强度，而且可以节约工程造价．本文从试验及机理两方面对此作了探讨．
铁磁纳米颗粒系统磁性质对尺寸和各向异性效应的依赖
纳米颗粒尺寸 各向异性 矫顽力 纳米颗粒磁效应
2009/10/29
研究了随机分布颗粒系统的尺寸、各向异性、矫顽力和温度之间的关系.从FexCu1-x，Fe/SiO2，Fe/Al2O3颗粒膜实验结果入手，以Néel-Bron理论和Storner-Wohlfartly模型为依据，建立了描述细磁性颗粒矫顽力Hc与颗粒大小d、热力学温度T的函数关系，并得出在粒径小于dm(=18～20?nm)范围内，矫顽力随着颗粒的尺寸的增加而迅速地增大，而...
铜纳米颗粒的制备与表征
纳米颗粒 铜 聚丙烯酰胺
2009/10/29
在乙醇－水体系中，碱性条件和CTAB的存在下，以硼氢化钠为还原剂，硝酸铜为铜源，制备了铜纳米颗粒的水溶胶；然后以 S-十二烷-N-二硫代氨基甲酸酯-聚丙烯酰胺(PAMDTCD) 为修饰剂和相转移剂，将铜纳米颗粒从水相转移到油相中.利用FTIR，TEM，XPS和XRD对所得的铜纳米颗粒进行了表征.结果表明，PAMDTCD能在铜纳米颗粒表面形成紧密的吸附层，有助于提高铜纳米颗粒的稳定性和分散性.
This paper provides a "state-of-the-art" review of research into the effects of high temperature on concrete and concrete structures, extending to a range of forms of construction, including novel dev...
Deformation Analysis of Elastic-Plastic Two Layer Tubes Subject to Pressure: an Analytical Approach
Composite tubes Elastoplasticity strain hardening Tresca's criterion
2009/10/12
Analytical solutions are obtained for axisymmetric elastic-plastic deformations in tightly tted concentric tubes with xed ends subjected to either internal or external pressure. Tresca's yield crite...
Development of a Laboratory Test Procedure to Evaluate Tack Coat Performance
Asphalt Tack coat Hamburg wheel tracking device Shear test Asphalt overlays
2009/10/10
A laboratory testing procedure is presented, the results of which may be used for determining the best combination of tack coat type, mixture type, and application rate to be applied in the feld for o...
Computer Solutions of Plane Strain Axisymmetric Thermomechanical Problems
Stress analysis Thermoelastoplasticity Residual stresses Nonlinear strain
2009/10/10
A simple computational model is developed to estimate elastic, elastic-plastic, fully plastic, and residual stress states in generalized plane strain axisymmetric structures considering temperature de...
Elastoplastic Response of a Long Functionally Graded Tube Subjected to Internal Pressure
Stress analysis Elastoplasticity Pressure chamber Functionally graded material
2009/10/10
Plane strain analytical solutions to functionally graded elastic and elastic-plastic pressurized tube problems are obtained in the framework of small deformation theory. The modulus of elasticity of t...
结合某超高层钢结构工程，针对该项目中拟采用的中厚壁、大直径钢管混凝土节点可能存在的层状撕裂问题进行试验研究。依据CECS 28:90规范设计了两种不同构造的内置加劲环节点，对其进行的加载试验表明：该节点具有较高的承载力和变形能力，塑性铰出现在梁柱交接处，若焊接稍有缺陷则很有可能发生层状撕裂现象。在此基础上，提出了对梁端翼缘进行变截面扩展处理的改进型节点，并重新进行试验及相应的有限元分析。研究表明：...
Strengthening Techniques of RC Columns Using Fibre Reinforced Polymeric Materials
RC columns fibre reinforced polymeric composites (FRP) strengthe-ning systems
2010/8/17
Fibre reinforced composite materials are becoming more frequently used in civil engineering structures. One of the most practical applications of these new materials concerns the strengthening of rein...
Adhesive Bonding Techniques in Hybrid Structures Made from Fibre Reinforced Polymeric Composites and Concrete
Fibre reinforced polymeric composites (FRP) concrete adhesive hybrid structures bonding techniques
2010/8/18
Mechanical joining techniques are used in construction industry all over the world on a daily basis. A further method of joining has proven to be highly successful – adhesive bonding. Known for thousa...
就昆明地区饱和粉土、粉砂的液化判别存在的实际问题,结合实际工程,分别采用标准灌入法和静力触探法进行判别、比较,针对判别结果存在的问题提出相应的完善措施和改进建议.
本土特色材料的景观应用
本土特色 景观 材料
2009/12/30
从常规角度入手分析非常规的景观材料，介绍了开发本土特色景观材料的意义及选择的原则，以期引起更多景观从业者对本土特色材料的重视，推动景观业的进一步发展。
煤矸石复合混合材料混凝土抗渗性能的研究
煤矸石 抗渗性 粉煤灰 混凝土
2009/9/10
利用煤矸石、粉煤灰、矿渣代替部分水泥,制作C50复合混凝土,分析混合材料对混凝土的力学特性和抗渗性能的影响.采用正交试验设计与微观相结合,并对复合混凝土的抗渗性能做了初步研究.试验结果表明,煤矸石掺量在10%以下时,混凝土的抗渗性能得到提高.