排序方式: 共有118条查询结果,搜索用时 15 毫秒
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BP神经网络技术在斜拉桥施工控制中的应用 总被引:2,自引:0,他引:2
介绍了传统方法在斜拉桥施工控制中的局限性,提出了以BP神经网络技术为基础的施工控制方法.研究表明,人工神经网络方法在解决多影响因子复杂非线性问题方面具有显著的优势,在施工控制中具有广阔的应用前景.通过具体实例验证了该方法具有较强的可行性及可靠性. 相似文献
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宁波招宝山大桥是曾经严重事故、后经局部拆除加固重建的大型独塔不对称斜拉桥,目前成桥状态十分复杂。为了评估大桥的使用性能和建立桥梁健康监测系统,需要符合实际结构的有限元分析计算模型。在采用精细的有限元模型基础上,以实际测量的动态试验数据为依据,应用基于灵敏度分析为基础的模型修正法,对结构有限元模型进行了修正。基于振型的模态确认准则的相关性计算表明,修正后的有限元模型比较好的反映了结构的实际状态,由此计算分析了成桥状态的动力特性。相关结果可为后续结构健康检测、损伤评估与维修管理提供必要的技术支持。 相似文献
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加劲梁的结构型式,大体土分钢梁和混凝土梁两种钢梁,主梁类型有钢主梁、混凝土主梁、钢及混凝土结合梁、钢及混凝土混合梁等多种型式的加劲梁,应结合桥梁的实际情况,包括静力、动力特性,施工运输条件、抗风要求、抗震要求、后期养护以及结构设计等多种因素,经综合比选确定。 相似文献
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文章以现代桥梁的耐久性设计为研究对象,结合桥梁耐久性设计理念发展历程,从内力计算、全寿命设计、规范化设计三个方面阐述了现代桥梁耐久性设计的新理念,为今后桥梁的耐久性设计提供相应参考经验。 相似文献
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何红丽 《辽宁省交通高等专科学校学报》2012,14(4):1-4
以海拉尔哈萨尔斜拉桥为工程背景,通过理论分析和施工工期安排,详细比较了混凝土斜拉桥主梁两种常用的施工方法 (支架法和悬臂浇注法)的优缺点,并最终确定支架法为该桥的施工方案。 相似文献
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Based on full-scale segment model tests of the abnormally shaped anchorage zone of the Maling River cable-stayed bridge pylon and FEM analysis, its mechanical and deformation properties were obtained, and the validity of FEM analysis was verified.An optimal layout of prestressed tendons in the anchorage zone was obtained by using the strut-and-tie method (STM).The comparison FEM analysis between the full-scale segment model and the optimal prestressed tendons model show that:the optimal model not only saves prestressed tendons, but also achieves the same cracking resistance; STM method is reliable and accurate in the analysis of the abnormally shaped anchorage zone of cable-stayed bridge pylon. 相似文献
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斜拉桥换索前的索力调整 总被引:1,自引:0,他引:1
以某斜拉桥为工程背景,通过模拟换索前状态,识别既有桥梁的结构参数,确定结构的当前内力状态并对其进行评估,分析换索前进行索力调整的必要性.索力调整结束后,结构内力状况得到了改善,保证了换索施工能够安全进行. 相似文献
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Adopting a steel-anchor beam and steel corbel composite structure in the anchor zone on pylon is one of the key techniques for the design of Jintang bridge, a cable-stayed bridge in Zhoushan, China. In order to ensure the safety of the steel-concrete composite structure, a stud connector model for the joint section was put forward. Experiments were conducted to obtain the relation between load and slip of specimen, the failure pattern of stud connector, the yield bearing capacity and ultimate bearing capacity of a single stud, etc. The whole process of the structural behavior of the specimen was comprehensively analyzed. The features of the internal force distribution in the steel-concrete composite structure and the strain distribution of stud connector under different loads were emphatically studied. The test results show that the stud connector is applicable for the steel-concrete composite structure for pylon of Jintang bridge. The stud has a good ductility performance and a obvious yield process before its destruction. The stud connector basically works in a state of elasticity under a load less than the yield load. 相似文献