本文選題：相對剛度比 + 架空直立式碼頭��； 參考：《重慶交通大學》2017年碩士論文

【摘要】：隨著內(nèi)河航運的發(fā)展,碼頭結構形式層出不窮,每種結構形式都有其獨特的受力特征和計算方法。在實際工程設計中,設計人員往往希望在材料用量一定的前提下,設計出合理的碼頭結構形式,使碼頭達到最好的受力性能,這就涉及到碼頭的梁、柱合理相對剛度比的優(yōu)化問題。合理的梁、柱相對剛度可有效地提高碼頭結構承載能力和變形能力,改善碼頭結構的抗震性能。因此,本文以某典型架空直立式碼頭為工程背景,開展了相對剛度比對典型碼頭結構受力、變形及抗震性能的影響分析研究,主要研究內(nèi)容如下:1.搜集國內(nèi)外相關文獻,總結分析框架結構合理相對剛度比對結構影響分析的研究現(xiàn)狀,并對框架結構地震易損性及地震風險評估進行了回顧,提出目前研究的不足,并闡述了本文的主要研究內(nèi)容。2.詳細介紹了碼頭結構各構件數(shù)值模擬方法,采用OpenSees軟件建立了典型碼頭結構的非線性計算模型,并通過模型試驗結果驗證了有限元模型的可靠性。3.首先基于優(yōu)化理論及結構彈塑性理論,在材料用量不變的前提下,推導了碼頭結構合理相對剛度的計算理論,推導出的合理相對剛度可使碼頭結構具有較好的抗側能力。而后以重慶果園港碼頭結構為研究背景,在碼頭總高度不變的前提下,設計了七種不同層間高度的碼頭結構,分析了七種碼頭結構在不同船舶撞擊荷載作用下的受力性能和變形能力,在綜合考慮碼頭結構受力、變形、經(jīng)濟性和功效等因素的基礎上,對比研究了碼頭結構的最優(yōu)層間高度;然后以最優(yōu)層間高度碼頭結構為研究對象,運用本文推導的合理相對剛度計算理論,在保證材料用量不變情況下,設計了六種不同梁截面尺寸,計算分析六種相對剛度下碼頭的受力和變形能力,對比研究確定出架空直立式碼頭結構最優(yōu)的相對剛度范圍,最后基于上述研究成果,開展了算例碼頭結構截面尺寸優(yōu)化設計研究。4.結合結構地震易損性分析方法、場地地震危險性分析方法、結構地震風險評估等理論,在充分考慮各地震水準下地震危險性及碼頭結構地震易損性基礎上,提出了基于風險評估的碼頭結構抗震分析方法;以重慶果園港碼頭結構為研究背景,開展了不同層高碼頭結構的抗震性能分析,建立了各碼頭結構的地震易損性曲線,對比研究了各種碼頭結構的易損性特點;評估了不同層高碼頭結構的地震風險值及其抗震性能,研究比選出抗震性能最優(yōu)的架空直立式碼頭合理相對剛度比。
[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.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U656.124

【參考文獻】

相關期刊論文 前10條

1 劉昕s，

本文編號：1804456