【作者】 王世杰；

【导师】 田玉梅； 李静辉；

【作者基本信息】 东北林业大学 ， 桥梁与隧道工程， 2007， 硕士

【摘要】 桥梁结构荷载试验就是对桥梁结构物进行直接加载测试的一项科学试验工作。通过荷载试验可以为决策者对桥梁的承载能力做出科学地评估，提供有利、直观的依据，可以为新的结构、新的设计理论和新的施工工艺的发展与应用积累实践资料。绥芬河斜拉桥为独塔单索面、塔梁墩固结斜拉桥，采用水平转体施工，转体重量达14000吨，在国内尚属首创。本文以现代斜拉桥设计理论、振动测试与分析技术、空间有限元法为理论基础，在总结有关桥梁的荷载试验方法的基础上，以绥芬河斜拉桥为工程背景，对绥芬河斜拉桥荷载试验方法进行了研究。采用桥梁博士软件对绥芬河斜拉桥进行理论分析，在保证荷载试验效果的前提下，确定试验的控制荷载和加载工况，将各种工况下结构控制截面的实际变形或者应力值同理论计算值进行比较，计算出结构的校验系数；相同测点在各工况间进行数值比较时，采用各测点测值占该工况测点总测值比例的方法进行比较，有效地减小了环境因素对数值的影响；根据独塔单索面斜拉桥的特点分析数据产生的原因，并对规律进行相应的总结；确定该桥的实际承载能力。桥梁结构的振动问题影响因素复杂，为了测定该桥在动荷载作用下的真实情况，分别进行了跑车试验、刹车试验和跳车试验。根据控制断面在各工况下的时程曲线，分析确定了该桥的实际的冲击系数，并同理论设计时规范所取的冲击系数进行了比较。根据实测结果为公路建设、管理等相关部门提出了相应的建议。利用ANSYS软件建立了绥芬河斜拉桥的空间有限元模型，并进行了理论上的模态分析，得到了该桥理论上的自振频率和振型。通过对绥芬河斜拉桥实桥的脉动测试，分析确定了绥芬河斜拉桥实测的模态参数(包括振型、频率以及阻尼比)，并根据独塔单索面斜拉桥的结构特点，分析了产生这些振型的原因。实测结果与理论计算结果的对比表明：该桥具有良好的动力性能。更多还原

【Abstract】 Load test of bridge structure is a scientific test work which carries on the direct load testto the bridge structure. It can provide advantageous and direct-viewing basis for administratorsto evaluate the capacity of loading of bridge and accumulate practical datum especially for thenew structure, the new design theory and development and the application of the newconstruction craf. Sui Fenhe Cable-stayed Bridge is a single tower, single cable plane andtower-beam-pier consolidation bidge which is constructed by horizontal swivel-construction,the weight amounts to 14,000tons which is originated in domestic. Based on the method ofmodem bridge design, space infinite element, vibration testing and analytical technology,Taking Sui Fenhe Cable-stayed Bridge as project background, this text studies load test plan ofSui Fenhe Cable-stayed bridge in foundation of summarizing the load test plans of someconcerned bridges.Through the theoretical analysis of Sui Fenhe Cable-stayed bridge by Dr. Bridge software,the paper diterminated the controlling load and loading condition in premise of guaranteeingthe load test efficiency, compared actual deformation or strain value of the controlling sectionwith theory calculated value in various working condition and calculated the structureverification coefficient. When comparing the value of same measuring points in variousworking condition, this text carries on the proportion of each measuring point,s value withvalue of all measuring points on the comparison to reduce the effect of environmental factoreffectively. According to the characteristic of Cable-stayed Bridge with Single Tower andSingle Cable Plane, this text analysis why this data produces,then determines the actualcapacity of loading of this bridge and carries on the corresponding summary to the rule.The influence factor of bridge vibration is very complicated. In order to test the actualcondition when the bridge is forced by dynamical load, running test, braking test and jumpingtest are carried out respectively. According to the time-travel curve under the cases above-mentioned, the actual figure of impact coefficient are came out. At the same time this textcompares it with that in theory and brought forward beneficial advices for the road managingand maintaining department.Theoretical mode analysis is made by establishing the space infinite element model of SuiFenhe Cable-stayed Bridge with ANSYS software and natural vibration frequency and modeshape of Sui Fenhe Cable-stayed Bridge theoretically are concluded. This text tested the actualmode parameters (including mode shape, natural vibration frequency and damping ratio)through pulsation measurement method, and analyses why caused these mode shape accordingto the structure characteristic of Sui Fenhe Cable-stayed. The comparison between actual results and those in theory indicated that the bridge is qualified with satisfactory dynamicalperformance.更多还原