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| 1 | 全复合材料桁架扭转刚度分析显示文摘为了解决全复合材料桁架扭转刚度缺少实验外有效表征手段的问题,首先,基于均匀化思想,依据单胞剪切刚度相等原则,将全复合材料桁架等效为闭口薄壁梁,推导其等效扭转刚度;然后提出位移转换法并测量桁架转角,对全复合材料桁架扭转刚度进行了实验研究;最后,在梁单元桁架模型中嵌入精细化接头模型,对全复合材料桁架扭转刚度进行了仿真分析。结果表明:等效及仿真结果与实验值基本吻合,等效分析方法能够有效预测全复合材料桁架的扭转刚度,桁架仿真模型具有一定的工程实用性;实验方案可靠,所提出的位移转换法能够解决小转角测量相对误差较大的问题。 | 熊波 罗锡林 谭惠丰 | 2015 | 复合材料学报2015，32，2： | 5 |
| 2 | A simple analytical solution for predicting deflection of a hybrid FRP-aluminum modular space truss bridge显示文摘A novel hybrid FRP-aluminum space truss was employed in a two-rut modular bridge superstructure, which is composed of standard structural units. The main objective of this work was to obtain a simple analytical solution that can conveniently predict the deflection of the proposed hybrid space truss bridge. The analytical formulae are expected to possess a straightforward format and simple calculation process. A simple description of the proposed bridge was introduced. The design formulae of the deflection were derived based on a simplified analytical plane truss model, which possessed hinge nodes and was subsequently simplified as two solid web beams during the theoretical derivation process. To validate the analytical model and formulae, numerical and experimental works were conducted and compared with the theoretical solutions. The results indicate that the analytical formulae provide higher deflection magnitudes with a difference of <1.5% compared with the experiments performed and <4.5% compared with the FE model used; the simplified plane truss is thus shown to be an effective analytical model for the derivation of deflection design formulae, which can conveniently calculate the deflection of the hybrid space truss bridge with satisfactory accuracy. | 李飞 张冬冬 赵启林 邓安仲 | 2015 | Journal of Central South University2015，22，11： | 1 |
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