本文選題：地下結(jié)構(gòu) + 抗震設(shè)計方法�。� 參考：《中國地震局工程力學(xué)研究所》2014年碩士論文

【摘要】：地下空間在現(xiàn)代社會中被廣泛利用，已成為城市中不可缺少的一部分。特別是地下軌道交通的迅速發(fā)展，大大改善了特大城市和超大城市地面交通擁堵的窘境。地下結(jié)構(gòu)建設(shè)周期長、造價高、施工難度大，并且破壞后所造成的直接和間接經(jīng)濟損失都比一般的地面結(jié)構(gòu)要大得多。然而，地下結(jié)構(gòu)的振動特性與地面結(jié)構(gòu)相比存在很大的差異，照搬地面結(jié)構(gòu)的抗震設(shè)計方法進行地下結(jié)構(gòu)抗震設(shè)計并不可取。在歷史多次地震中，均出現(xiàn)了隧道、地鐵車站、地下排水管等地下結(jié)構(gòu)的破壞。地下結(jié)構(gòu)一旦破損，其修復(fù)工作也是相當困難的。本文在總結(jié)前人工作的基礎(chǔ)上，通過數(shù)值模擬和理論分析，對比研究了各種地下結(jié)構(gòu)抗震設(shè)計方法的優(yōu)劣性，同時對反應(yīng)位移法的計算參數(shù)進行了靈敏度分析并對該方法進行了改進，，具體內(nèi)容如下： 1.研究現(xiàn)狀 本文從解析法、數(shù)值模擬和簡化分析方法三個方面介紹了地下結(jié)構(gòu)抗震設(shè)計方法的研究現(xiàn)狀。 2.地下結(jié)構(gòu)抗震設(shè)計方法 本文詳細介紹了5種地下結(jié)構(gòu)抗震設(shè)計方法（地震系數(shù)法、自由場變形法、土-結(jié)相互作用系數(shù)法、反應(yīng)位移法、有限元擬靜力法）的計算形式、優(yōu)缺點及其工程適用性。 3.地下結(jié)構(gòu)設(shè)計方法對比分析 本文在第二章的基礎(chǔ)上，對這5種計算方法在地下結(jié)構(gòu)處于不同土體剪切模量、不同埋深和復(fù)雜土層三種情況進行了對比計算，并將其計算結(jié)果與動力有限差分軟件Flac2D的計算結(jié)果進行對比，對其計算結(jié)果進行分析，進一步評判各種方法的優(yōu)缺點。 4.反應(yīng)位移法計算參數(shù)的靈敏度分析 本文對反應(yīng)位移法中4種計算參數(shù)（彈簧系數(shù)、土層位移、土層剪力、慣性力）進行了靈敏度分析，得出了各個計算參數(shù)對地下結(jié)構(gòu)內(nèi)力的影響大小，同時對常用的兩種計算模型進行了對比研究。 5.反應(yīng)位移法改進 本文從改進反應(yīng)位移法計算參數(shù)著手，分別對彈簧系數(shù)、土層剪力以及慣性力的求解方法進行改進，并對其計算結(jié)果進行調(diào)整。研究結(jié)果表明改進的反應(yīng)位移法優(yōu)于傳統(tǒng)的反應(yīng)位移法，且適用性良好。
[Abstract]:Underground space is widely used in modern society, has become an indispensable part of the city.Especially the rapid development of underground rail transit has greatly improved the ground traffic congestion in megacities and megacities.The construction period of underground structure is long, the cost is high, the construction is difficult, and the direct and indirect economic loss caused by the destruction is much larger than that of the ordinary ground structure.However, the vibration characteristics of underground structure are quite different from those of ground structure, so it is not advisable to carry out seismic design of underground structure by copying the seismic design method of ground structure.In many earthquakes in history, underground structures such as tunnels, subway stations, underground drainage pipes and so on have been destroyed.Once the underground structure is damaged, its repair work is also quite difficult.On the basis of summing up the previous work, this paper compares and studies the merits and demerits of various seismic design methods for underground structures through numerical simulation and theoretical analysis.At the same time, the sensitivity of the calculation parameters of the reaction displacement method is analyzed and the method is improved. The content of the method is as follows:1.Research statusThis paper introduces the research status of seismic design methods for underground structures from three aspects: analytical method, numerical simulation method and simplified analysis method.2.Seismic Design method for Underground structuresThis paper introduces in detail five seismic design methods for underground structures (seismic coefficient method, free field deformation method, soil-junction interaction coefficient method, response displacement method, finite element pseudo-static method), their advantages and disadvantages and their engineering applicability.3.Comparison and Analysis of Underground structure Design methodsOn the basis of the second chapter, this paper makes a comparative calculation of the five calculation methods in three cases of underground structure in different soil shear modulus, different buried depth and complex soil layer.The calculation results are compared with those of the dynamic finite difference software Flac2D, and the results are analyzed, and the advantages and disadvantages of various methods are further evaluated.4.Sensitivity Analysis of parameters calculated by reactive displacement methodIn this paper, the sensitivity analysis of four calculation parameters (spring coefficient, soil displacement, soil shear force, inertia force) in the reactive displacement method is carried out, and the influence of each calculation parameter on the internal force of underground structure is obtained.At the same time, two kinds of calculation models are compared and studied.5.Improvement of reaction displacement methodIn this paper, we improve the calculation method of spring coefficient, soil shear force and inertia force, and adjust the calculation results.The results show that the improved reactive displacement method is superior to the traditional reactive displacement method, and its applicability is good.
【學(xué)位授予單位】：中國地震局工程力學(xué)研究所
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU93;TU352.12

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本文編號：1749060