梁柱相对刚度比对架空直立式码头结构的影响研究

发布时间：2018-04-26 04:19

本文选题：相对刚度比 + 架空直立式码头　；参考：《重庆交通大学》2017年硕士论文

【摘要】：随着内河航运的发展,码头结构形式层出不穷,每种结构形式都有其独特的受力特征和计算方法。在实际工程设计中,设计人员往往希望在材料用量一定的前提下,设计出合理的码头结构形式,使码头达到最好的受力性能,这就涉及到码头的梁、柱合理相对刚度比的优化问题。合理的梁、柱相对刚度可有效地提高码头结构承载能力和变形能力,改善码头结构的抗震性能。因此,本文以某典型架空直立式码头为工程背景,开展了相对刚度比对典型码头结构受力、变形及抗震性能的影响分析研究,主要研究内容如下:1.搜集国内外相关文献,总结分析框架结构合理相对刚度比对结构影响分析的研究现状,并对框架结构地震易损性及地震风险评估进行了回顾,提出目前研究的不足,并阐述了本文的主要研究内容。2.详细介绍了码头结构各构件数值模拟方法,采用OpenSees软件建立了典型码头结构的非线性计算模型,并通过模型试验结果验证了有限元模型的可靠性。3.首先基于优化理论及结构弹塑性理论,在材料用量不变的前提下,推导了码头结构合理相对刚度的计算理论,推导出的合理相对刚度可使码头结构具有较好的抗侧能力。而后以重庆果园港码头结构为研究背景,在码头总高度不变的前提下,设计了七种不同层间高度的码头结构,分析了七种码头结构在不同船舶撞击荷载作用下的受力性能和变形能力,在综合考虑码头结构受力、变形、经济性和功效等因素的基础上,对比研究了码头结构的最优层间高度;然后以最优层间高度码头结构为研究对象,运用本文推导的合理相对刚度计算理论,在保证材料用量不变情况下,设计了六种不同梁截面尺寸,计算分析六种相对刚度下码头的受力和变形能力,对比研究确定出架空直立式码头结构最优的相对刚度范围,最后基于上述研究成果,开展了算例码头结构截面尺寸优化设计研究。4.结合结构地震易损性分析方法、场地地震危险性分析方法、结构地震风险评估等理论,在充分考虑各地震水准下地震危险性及码头结构地震易损性基础上,提出了基于风险评估的码头结构抗震分析方法;以重庆果园港码头结构为研究背景,开展了不同层高码头结构的抗震性能分析,建立了各码头结构的地震易损性曲线,对比研究了各种码头结构的易损性特点;评估了不同层高码头结构的地震风险值及其抗震性能,研究比选出抗震性能最优的架空直立式码头合理相对刚度比。
[Abstract]:With the development of inland navigation, wharf structure forms emerge in endlessly, each kind of structure form has its unique force characteristic and calculation method. In actual engineering design, designers often hope to design a reasonable structure form of wharf under the premise of a certain amount of materials, so that the wharf can achieve the best mechanical performance, which involves the beam of the wharf. Optimization of reasonable relative stiffness ratio of columns. Reasonable relative stiffness of beam and column can effectively improve the bearing capacity and deformation capacity of wharf structure and improve the seismic performance of wharf structure. Therefore, based on the engineering background of a typical overhead vertical wharf, the influence of relative stiffness ratio on the stress, deformation and seismic behavior of typical wharf structure is studied. The main research contents are as follows: 1. In this paper, the current situation of the analysis of the influence of reasonable relative stiffness ratio on the frame structure is summarized, and the seismic vulnerability and seismic risk assessment of the frame structure are reviewed, and the shortcomings of the present research are pointed out. The main research contents of this paper. The numerical simulation method of each component of wharf structure is introduced in detail. The nonlinear calculation model of typical wharf structure is established by using OpenSees software, and the reliability of the finite element model is verified by the model test results. Based on the optimization theory and the elastoplastic theory, the reasonable relative stiffness of the wharf structure is deduced on the premise of constant material content, and the reasonable relative stiffness can make the wharf structure have better lateral resistance. Then taking the structure of Chongqing Orchard Port as the research background, seven kinds of wharf structures with different interstory heights are designed under the premise of the same total height of the wharf. The mechanical performance and deformation capacity of seven kinds of wharf structures under different ship impact loads are analyzed. Based on the comprehensive consideration of the factors such as force, deformation, economy and efficiency of wharf structure, The optimum interstory height of wharf structure is compared and studied, and then the optimum interstory height wharf structure is taken as the research object, and the reasonable relative stiffness calculation theory is used in this paper, under the condition that the material consumption is not changed, Six different beam cross-section sizes are designed, and the stress and deformation capacity of the wharf under the six relative stiffness are calculated and analyzed. The optimum relative stiffness range of the overhead vertical wharf structure is determined by comparative study. Finally, based on the above research results, The optimum design of section size of wharf structure is studied. Combined with structural seismic vulnerability analysis method, site seismic hazard analysis method and structural seismic risk assessment theory, the seismic risk under various earthquake levels and seismic vulnerability of wharf structure are fully considered. The seismic analysis method of wharf structure based on risk assessment is put forward, taking the structure of Chongqing Orchard Port as the background, the seismic performance analysis of wharf structure with different stories is carried out, and the seismic vulnerability curve of each wharf structure is established. The vulnerability characteristics of various wharf structures are comparatively studied, the seismic risk value and seismic performance of wharf structures with different storeys are evaluated, and the reasonable relative stiffness ratio of elevated vertical wharves with optimum seismic performance is studied.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U656.124

【参考文献】