风—浪耦合场桥塔结构动力响应研究

发布时间：2018-06-01 07:10

本文选题：桥塔结构 + 风-浪耦合　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：在过去的10年间,我国桥梁建设正逐渐从内陆地区延伸到海岸地区,多个大跨度跨海大桥,如东海大桥,杭州湾大桥,胶州湾大桥等在此期间建设完成。对于跨海大桥,海洋环境中强风、波浪和海流等因素则成为影响跨海大桥设计,施工和运营过程中的重要因素。从塔科马大桥事故后,风对桥梁作用效应得到了深入研究,然而波浪以及更为复杂的风-浪环境对桥梁作用效应则研究较少,而该问题随着跨海大桥建设正逐渐深入海洋,其在复杂海洋环境下的动力响应规律变得亟待解决。本文主要通过对桥塔模型进行风-浪耦合试验和数值计算,对其在复杂海洋风浪环境下的动力响应进行探索和研究,本文的主要研究内容如下:(1)介绍了桥塔模型风-浪试验的基本过程,主要包括有桥塔模型缩尺比的选择和缩尺准则的确定;模型的设计、加工与安装;传感器的选择和布置;风-浪试验的进行以及数据的采集和分析。(2)模型处的风场和波浪场在试验前分别进行单独标定,随后给出了风-浪场的生成方法,并讨论了风-浪场中波列受到风和风生浪影响大小,从而对风-浪试验技术的可行性进行了确认。(3)试验中对桥塔弹性模型分别进行单风、单浪以及风-浪耦合作用测试并得到不同工况下的试验结果,通过对数据进行处理分析和对比,研究桥塔结构在单风、单浪和风-浪联合三种不同工况作用下结构位移,加速度,剪力和基底弯矩响应规律。(4)建立了风浪耦合作用下桥塔结构的力学分析模型,通过数值模拟分析了桥塔结构在风-浪耦合作用下的动力响应,并与试验结果进行对比。该分析模型中风荷载采用抖振理论计算,波浪荷载采用试验实测数据,其受力分布采用数值模拟得到。时程分析中考虑到了结构的非线性,以及波浪作用的瞬态响应等相关问题,其结果对试验的准确性进行了验证,并对试验工况进行补充。
[Abstract]:In the past 10 years, the construction of bridges in China has gradually extended from the inland areas to the coastal areas. Many long-span sea bridges, such as the East China Sea Bridge, the Hangzhou Bay Bridge and the Jiaozhou Bay Bridge, have been completed during this period. For a sea crossing bridge, strong winds, waves and currents in the ocean environment have become important factors in the design, construction and operation of the bridge. Since the Tacoma Bridge accident, the effect of wind on the bridge has been deeply studied, but the wave and the more complex wind-wave environment have been less studied on the bridge effect, and this problem is gradually deepening into the ocean with the construction of the bridge across the sea. Its dynamic response law in complex marine environment becomes urgent to be solved. In this paper, the wind wave coupling test and numerical calculation of the bridge tower model are carried out to explore and study the dynamic response of the bridge tower model under the complex ocean wind and wave environment. The main research contents of this paper are as follows: (1) the basic process of wind wave test of tower model is introduced, including the selection of scale ratio of tower model and the determination of scaling criterion, the design, processing and installation of model, the selection and arrangement of sensors, and so on. The wind field and wave field at the model are calibrated separately before the test, and the generating method of the wind wave field is given. The influence of wind and wind waves on wave train in wind-wave field is discussed, and the feasibility of wind-wave test technique is confirmed. Single wave and wind-wave coupling are tested and the test results under different working conditions are obtained. By analyzing and comparing the data, the structural displacement of the tower structure under the action of single wind, single wave and wind-wave combination is studied. Acceleration, shear force and the response law of base bending moment. 4) the mechanics analysis model of tower structure under wind and wave coupling is established. The dynamic response of tower structure under wind wave coupling is analyzed by numerical simulation, and the results are compared with the experimental results. The stroke load of the model is calculated by buffeting theory, the wave load is measured by experimental data, and the force distribution is obtained by numerical simulation. The nonlinear structure and the transient response of waves are considered in the time-history analysis. The results verify the accuracy of the test and supplement the test conditions.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3

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