排序方式: 共有58条查询结果,搜索用时 15 毫秒
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以广州新光大桥为例,详细分析了大跨度连续刚架钢桁拱桥的动力特性以及在两阶段两水准设防概率水平下,考虑行波效应时的地震响应,并与一致激励下结构控制断面的内力和位移响应情况进行了详细比较;给出了在不同剪切波速下主拱拱顶纵向位移时程曲线,证明了地震剪切波速对结构控制断面的位移有着较大的影响。所得结论为类似大跨度桥梁的抗震设计提供了理论依据。 相似文献
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Zhongshan Bridge is a kind of steel arch bridge with a particular space-combined structure.The rationality of design.accuracy of theoretical calculation and reliability of transportation were studied.Its design,FEM calculation of stresses and strains,and model test were introduced in detail.The theoretical analysis and model test verified that the design was reliable and safe.The simulated stresses,rigidity and stability,which are based on the selected loading system and cross-section geometry,satisfy the related design standards.Some of the issues that need to be considered in the real bridge construction were also discussed. 相似文献
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The design scheme of long-span and low-depth composite steel-conerete beams is introduced,and the methods of avoiding the cracking of concrete deck in the negative moment regions are proposed.Moreover,significant exploration for problems of the composite beams has been made,such as optimizing construction steps to regulate the stress,applying jacking technique to exert prestress on the concrete deck,investigating the uplifting force principle of the shear connectors by means of model test and non-linear finite element analysis,and pointing out the countermeasure to reduce tension force of the shear connectors. 相似文献
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粤港澳大湾区合作的全面实施对区域交通高等教育提出了更高的要求,当前大湾区交通高等教育存在总量偏少、层次不高、国际化程度不高、协同性不强等系列问题,难以支撑交通运输行业在湾区协同发展中的基础性和先导性作用。因此,有必要从优化制度安排和协同平台设计、组建高水平综合交通运输类高等院校、探索湾区交通类专业集群发展模式、研制统一的人才培养标准体系、搭建协同创新科技平台等方面推进湾区交通高等教育的协同发展。 相似文献
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大跨度异形结合梁设计与分析计算 总被引:6,自引:0,他引:6
广州内环线东山口立交中心一路西标段设计采用三跨预应力钢-混凝土结合梁结构,跨度布置(50+70+60)m,高跨度比为1/32。简要介绍了该大跨度异形结合梁设计思路及分析计算方法,从中探讨了防止结合梁负弯矩区混凝土桥面板开裂的方法。 相似文献
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某双曲拱桥静动载试验与分析 总被引:1,自引:0,他引:1
随着我国交通事业的发展,旧桥承载能力日益成为交通管养部门关注的问题。文中针对某双曲拱桥,采用ANSYS有限元分析程序,制定了结构的静动载试验加载方案。并通过对静动载试验数据的分析,确定了该结构的实际承载能力及使用性能。部分结论对现有同类桥梁的管理有一定的参考价值。 相似文献
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