【作者】 关淑萍；

【导师】 张燎军；

【作者基本信息】 河海大学 ， 水工结构工程， 2006， 硕士

【摘要】 水闸是一种低水头建筑物,一般建立在岩基或土基上,设计分析时需要考虑地基沉降、抗滑稳定、内力分析、配筋设计和结构抗震等。本文主要介绍了水闸结构分析发展现状,研究了水闸结构动力特性和内力分析的理论与方法,主要内容如下: 1.介绍了ANSYS软件及其二次开发技术和水工结构动力分析的理论与方法。针对目前工程界广泛关注的流固耦合问题,论述了流固耦合问题的基本理论及求解方法。重点研究了在ANSYS中考虑动水压力的两种方法,即有限域内附加质量法和顺序弱耦合算法。 2.以一U型结构为例,研究结构和水体动力相互作用问题。首先,按有限域内附加质量方法计算了不同水体宽度、不同水位高度等对结构自振特性的影响。其次,基于ANSYS中的顺序弱耦合求解方法,研究了U型结构动水压力随时间的变化过程以及水体晃动的流固耦合问题。最后,对用Westergaard方法、有限域内附加质量方法和基于ANSYS的直接耦合分析方法求解的U型结构振动特性进行了比较分析,得出一组具有实用价值的研究成果。 3.进行了潘庄节制闸的抗震分析研究。以标准加速度反应谱和两条不同加速度时程记录作为输入地震波,按反应谱法和时程分析两种方法对此水闸进行了地震反应分析,计算出结构动位移和动静组合应力,并对三种计算结果进行了分析比较。 4.以耿楼枢纽节制闸为例,提出了在ANSYS中实现闸室结构内力计算的方法。在考虑闸墩、底板和地基相互作用的基础上,对不同岸墙方案(边荷载)影响下的闸室底板内力进行了详细的研究分析,给出了不同边荷载作用下水闸底板内力的分布规律,可为进一步的配筋设计提供参考。本文的研究成果使水闸三维有限元的计算成果可以直接为工程设计服务。更多还原

【Abstract】 Sluice is a kind of low-head structure, which is established on rock foundation or soil foundation. The foundation settlementN stability against sliding、 analysis of internal force、 design of reinforcing bars and earthquake-resistance structure were considered in sluice designing. In this article, the present state and the develop history of study is introduced, the dynamic property of sluice structure and the theory of internal force analysis were studied. The main contents of the paper are as follows:1. The software ANSYS and its second developing techniques, the theory of dynamic analysis of hydro-structure were introduced. The basic theory and solving method of structure-liquid coupling is discussed, aiming at attention problem in current engineering field. Two methods considering dynamic water pressure in ANSYS were studied, which were finite field addition mass method and sequence weak coupling solving method.2. The problem of Fluid-Solid Interaction was studied, with one U shape structure as the example. Firstly, the influence of width of water body and height of water level to vibration property of structure was calculated, according to the finite field addition mass method. Secondly, based on the sequence weak coupling solving method in ANSYS, the variational course adapt to time of dynamic water pressure and structure-liquid coupling problem of water body sway of U-type structure were studied . Finally, a set of research findings which have applied value were elicited ,basing on comparing oscillation characteristic of U-type structure by different method , which are Westergaard method , finite field addition mass method and direct coupling method basing on ANSYS.3. The earthquake-resistance analysis of Panzhuang check gate was done. Basing on regarding standard gravitational response spectrum and two different gravitational temporal record as import earthquake wave, the earthquake reaction of this sluice is analyzed by response spectrum method and temporal analysis, the dynamical displacement and static and dynamic combined stress were calculated, and the results of three method were compared.4. The method using for calculating structure internal force of chamber was put forward, with check gate of Genglou hub as the example. Basing on considering the interaction of pier, floor and foundation, the internal force of chamber floor in different programme of side wall (margin load) was studied detailedly, the distribution law of chamber floor internal force in action of different margin load was given, which can providing reference to reinforcing bars. The research results in this article make the 3D calculation results of sluice can render services to engineering design directly.更多还原