弧形塔空间索面斜拉桥设计技术研究

发布时间：2018-12-16 12:53

【摘要】：本文以内蒙古自治区跨越西辽河某桥为工程背景，作为景观桥，该桥选型为弧形塔空间索面斜拉桥。论文分析了斜拉桥的设计要点、基本理论和关键技术。基于桥位处的自然条件、设计地震基本加速度以及桥梁的规模，确定设计技术标准和主要材料及性能，，对桥梁的总体结构进行了桥梁纵、横断面布置。运用MIDAS有限元软件，建立力学模型，对桥梁结构进行了强度、刚度、稳定性的验算，经计算结构满足设计要求。根据结构的合理状态，推导了最小能量法计算斜拉索的索力的计算公式。运用Lanczos迭代法计算动力特性，得到主桥结构自振周期。运用空气动力学原理，分析驰振、颤振以及涡激共振的临界风速和在E1、E2地震作用下，结构的抗震性能。论文的研究内容对斜拉桥的静力及动力分析具有较高的参考价值和理论意义。
[Abstract]:Based on the engineering background of a bridge crossing the West Liaohe River in Inner Mongolia Autonomous region, this paper takes the bridge as a landscape bridge, which is a cable-stayed bridge with curved tower spatial cable plane. The paper analyzes the design points, basic theory and key technology of cable-stayed bridge. Based on the natural conditions of the bridge, the basic acceleration of the earthquake and the scale of the bridge are designed, and the design technical standard, main materials and performance are determined. The overall structure of the bridge is arranged in longitudinal and cross-section. Using MIDAS finite element software, the mechanical model is established, and the strength, stiffness and stability of the bridge structure are checked and calculated. The calculated structure meets the design requirements. According to the reasonable state of the structure, the formula for calculating the cable force of the stay cable by the minimum energy method is derived. The Lanczos iterative method is used to calculate the dynamic characteristics and the natural vibration period of the main bridge structure is obtained. The critical wind speed of galloping flutter and vortex-induced resonance and the seismic behavior of the structure under the E1E _ 2 earthquake are analyzed by using the aerodynamics principle. The research content of this paper has high reference value and theoretical significance for static and dynamic analysis of cable-stayed bridge.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27

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