【作者】 张振学；

【导师】 魏连雨；

【作者基本信息】 河北工业大学 ， 结构工程， 2013， 博士

【摘要】 桥梁创新是桥梁发展的灵魂，它展现了设计者的创造能力和探索精神；近代桥梁的创新是桥梁“因地制宜”、“巧夺天工”的最高境界，是力学和美学的最佳结合和完美统一；当代桥梁的创新顺应城市发展和经济繁荣的需要，使得桥梁成为当地的标志性建筑；天津海河桥梁的创新，是近代桥梁创新的发展，它打破了桥梁传统理念上美学和力学之间的固有平衡，使得桥梁成为当地人文社会的一种象征和灵魂。本文以安阳桥为依托，研究了软土地基上空间大跨度钢网拱桥水平推力的问题，空间钢网拱桥桥梁结构的整体刚度和拱梁连接方式、拱梁刚度匹配的问题，空间钢网拱桥拱脚单点平动支撑的整体稳定。研究了双轴对称空间钢网主拱的结构、节点构造、刚度突变的处理、施工工艺，超大吨位铸钢的设计、受力性能、加工施工工艺，大吨位拉杆的布置和设计，空间钢网拱桥复杂关键节点的受力分析。安阳桥主拱为14条小拱组成的空间钢网结构，具有桥梁建筑艺术的独创性。与常规概念的主拱有所不同，安阳桥主拱结构复杂，整体刚度弱，交汇节点多，刚度突变处理难。在主拱的设计研究中，不仅要考虑结构刚度、受力需求、施工工艺、运输安装，更要考虑主拱的建筑艺术独创性。研究了空间钢网拱桥的特征值屈曲稳定和非线性屈曲稳定。在非线性屈曲研究中，以拱顶面外偏移0.22m（L/1000）的一阶屈曲模态作为安装误差的代表值，以十分之一自重产生的应力作为残余应力的代表值，研究了典型荷载工况的极值点失稳稳定系数和变形形状。研究了空间钢网拱桥的动力特性，空间钢网拱桥在反应谱和时程波下的受力性能。在安阳桥减隔震体系布置上，采用了双曲面球形减隔震支座和阻尼器，减隔震支座能有效降低下部结构的地震反应，阻尼器能有效降低主梁的纵向位移。研究了空间钢网拱桥的抗风性能问题。虽然借助计算软件可以准确地计算主拱和主梁三分力系数和结构周围的流场压力，但对于安阳桥这样如此复杂的桥梁结构，需要以主拱节段模型试验、主梁节段模型试验和全桥气动弹性模型试验，来评价桥梁结构的动风稳定性。更多还原

【Abstract】 Bridge innovation is the soul of the bridge development,which shows the designer’screativity and the spirit of exploration. The modern innovative bridge is the highest levelsof’according to local conditions” and “wonderful artical excelling nature”. It is the bestcombination and perfect unity of mechanics and aesthetics. Contemporary bridgeinnovation adapts to urban development and economic prosperity,and it makes bridge to bea local landmark. As an example, The innovation of Tianjin Haihe River bridge is thedevelopment of modern bridge innovation. It breaks the inherent balance between thetraditional bridge aesthetics and mechanics, and makes the bridge to be a symbol and soulof the local cultural and social.This paper relies on Anyang Bridge. The horizontal thrust of the spacial large spansteel mesh arch bridge on soft ground, the overall stiffness of the special steel mesh archbridge structure and the connections between arch and beam, the stiffness matching of archand beam, and overall stability of the bridge with single point of translational support arestudied.The concerns are also including the structure of the biaxial symmetry spacial meshmain arch, node formation, processing stiffness mutation, construction techniques, designand layout of large tonnage trolley, and complex stress analysis of the key nodes.Main arch of Anyang Bridge is spacial stencil structure consisting of14small arch,which has bridge construction artistic originality. The main arch is different from theconventional concept. Anyang Bridge structure is complex, overall stiffness is weak, andmore intersection nodes are included. In the design of the main arch, the structural stiffness,force requirements, construction technology, transportation and installation are not onlyconsidered, but also the construction of the main arch artistic originality.In this thesis, eigenvalue buckling and nonlinear buckling of the bridge are conducted.In the study of nonlinear buckling, first order buckling mode with the dome surface outsideoffset0.22m (L/1000) is treated as a representative value of the installation error. Stressgenerated by the one tenth of weight is treated as a representative value of the residualstress. Also it studies the stability factor at the extreme points and the deformed shape ofthe typical load case instability.It studies the dynamic characteristics of the bridge, mechanical performance of thespacial steel mesh arch bridge with response spectrum and time-histories wave. In thesystem of Anyang bridge earthquake-reduction and seismic-isolation, the hyperboloidspherical less isolation bearings and dampers are brought in. Isolation bearings can effectively reduce the seismic response of the lower part of the structure, and the dampercan effectively reduce the longitudinal displacement of the main beam.It studies wind resistance of the spacial steel mesh arch bridge. Although aerodynamiccoefficients of the main arch and the main beam and the pressure of the structure of theflow field around can be accurately calculated, It needs to the evaluate dynamic windstability of the bridge structure with the main arch segment model test, the main beamsegment model tests and full-bridge aeroelastic model test, due to the specificity of AnyangBridge.更多还原