本文選題：弦支穹頂結(jié)構(gòu)　切入點(diǎn)：穩(wěn)定性分析　出處：《西安建筑科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：弦支穹頂結(jié)構(gòu)是由上部單層網(wǎng)殼和下部索承體系相結(jié)合的一種新型復(fù)雜的空間結(jié)構(gòu)。相比單層網(wǎng)殼結(jié)構(gòu)弦支穹頂結(jié)構(gòu)受力更加合理，施工簡(jiǎn)便以及經(jīng)濟(jì)效益良好。而施威德勒弦支穹頂克服了肋環(huán)型結(jié)構(gòu)整體剛度差的缺點(diǎn)，能夠很好的適用于大中跨度。鑒于近幾年弦支穹頂結(jié)構(gòu)在諸多國(guó)際重大活動(dòng)中應(yīng)用的增多以及地震災(zāi)害的頻發(fā)，，對(duì)此類結(jié)構(gòu)有必要進(jìn)行整體穩(wěn)定以及抗震性能等方面的研究。 本文首先利用ANSYS有限元分析軟件建立了施威德勒弦支穹頂結(jié)構(gòu)模型，對(duì)其進(jìn)行線性和非線性屈曲分析。通過(guò)考慮矢跨比、撐桿高度以及環(huán)徑比對(duì)結(jié)構(gòu)整體穩(wěn)定性能的影響以及和單層網(wǎng)殼進(jìn)行對(duì)比，論證了弦支穹頂結(jié)構(gòu)的優(yōu)越性。 然后，本文分析了結(jié)構(gòu)的自振特性，計(jì)算出結(jié)構(gòu)的自振頻率和振型，同時(shí)與單層網(wǎng)殼進(jìn)行了對(duì)比分析。通過(guò)分析矢跨比、荷載大小、撐桿高度以及環(huán)徑比等參數(shù)對(duì)結(jié)構(gòu)自振頻率的影響，總結(jié)出了結(jié)構(gòu)自振特性隨各參數(shù)變化的基本規(guī)律。 最后，本文采用時(shí)程分析法，通過(guò)輸入典型的EL-centro波和Taft波提取了在水平向、豎向以及XZ兩維地震作用下的X和Z向時(shí)程位移曲線和桿件內(nèi)力，掌握了施威德勒弦支穹頂結(jié)構(gòu)地震反應(yīng)的基本規(guī)律。對(duì)結(jié)構(gòu)的地震響應(yīng)進(jìn)行了參數(shù)分析，提取了桿件的最大內(nèi)力響應(yīng)，總結(jié)了矢跨比和撐桿高度等參數(shù)對(duì)結(jié)構(gòu)動(dòng)力水平的影響。
[Abstract]:The chord dome is a new complex spatial structure which is composed of the upper monolayer reticulated shell and the lower cable-supported system, which is more reasonable than the single-layer latticed dome structure. The construction is simple and economic benefit is good, and Schweidler chord dome overcomes the shortcoming of the whole stiffness of ribbed ring structure. In view of the increasing application of dome structures in recent years and the frequent occurrence of earthquake disasters, it is necessary to study the overall stability and seismic performance of such structures. In this paper, the Schweidler dome structure model is established by using ANSYS finite element analysis software, and the linear and nonlinear buckling analysis of the dome is carried out. The influence of the height of bracing rod and the ratio of ring to diameter on the overall stability of the structure and the comparison with the single-layer latticed shell demonstrate the superiority of the chord dome structure. Then, the natural vibration characteristics of the structure are analyzed, and the natural vibration frequency and mode shape of the structure are calculated. At the same time, the structure is compared with the single-layer latticed shell. The influence of the parameters such as the height of the strut and the ratio of ring to diameter on the natural vibration frequency of the structure is summarized, and the basic law of the natural vibration characteristics of the structure with the variation of the parameters is summarized. Finally, the X and Z time-history displacement curves and the member internal forces under horizontal, vertical and XZ two dimensional earthquakes are extracted by means of time history analysis and the input of typical EL-centro and Taft waves. The basic law of seismic response of Schweidler dome structure is mastered. The seismic response of the structure is analyzed, the maximum internal force response of the member is extracted, and the influence of the parameters such as rise-span ratio and brace height on the dynamic level of the structure is summarized.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU399;TU352.11

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本文編號(hào)：1626743