本文關(guān)鍵詞： 鋼拱薄殼穹頂 有限單元法 地震響應(yīng)分析 行波法 時(shí)程分析法　出處：《沈陽建筑大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著公共建筑、交通建筑以及大型工業(yè)建筑對大跨空間結(jié)構(gòu)需求量的逐漸增加,各類大跨空間結(jié)構(gòu)得到了廣泛的應(yīng)用。大跨空間結(jié)構(gòu)具有形體合理、受力性能良好以及經(jīng)濟(jì)美觀等優(yōu)點(diǎn),是目前發(fā)展較快建筑形式之一。大跨空間結(jié)構(gòu)在不斷的創(chuàng)新和發(fā)展中采用了大量新工藝、新技術(shù)以及新材料,使大跨空間結(jié)構(gòu)更加便于施工建造和具有更強(qiáng)的實(shí)用性。鋼拱薄殼穹頂結(jié)構(gòu)越來越多的被應(yīng)用在城市的建筑結(jié)構(gòu)當(dāng)中。對于大量復(fù)雜、新型的大跨屋蓋的出現(xiàn),以及所表現(xiàn)出來的各種力學(xué)特征和安全穩(wěn)定性,受到了眾多科技和設(shè)計(jì)人員關(guān)注。 論文以某建筑公司的工程實(shí)例大跨鋼拱薄殼穹頂為研究基礎(chǔ),主要分析大跨鋼拱薄殼穹頂結(jié)構(gòu)在地震作用下的動(dòng)力特性。首先介紹了地震響應(yīng)分析的主要方法,大跨屋蓋結(jié)構(gòu)的地震響應(yīng)分析方法包括振型分解反應(yīng)譜法時(shí)程分析法和隨機(jī)振動(dòng)法。然后采用振型分解反應(yīng)譜法和時(shí)程分析法兩種方法對結(jié)構(gòu)進(jìn)行研究分析。 本文根據(jù)有限單元法利用大型有限元分析軟件ANSYS對大跨鋼拱薄殼穹頂進(jìn)行模擬分析,將地震譜和地震波分別施加到結(jié)構(gòu)上,通過軟件計(jì)算得出結(jié)構(gòu)在結(jié)構(gòu)在地震作用下的節(jié)點(diǎn)位移,確定了結(jié)構(gòu)在地震作用下的安全性。同時(shí),為了進(jìn)一步研究大跨鋼拱薄殼穹頂?shù)膭?dòng)力特征,考慮了不同參數(shù)對結(jié)構(gòu)動(dòng)力性能的影響。大跨鋼拱薄殼穹頂隨著加勁肋數(shù)量和薄殼厚度的改變時(shí),在地震作用下的響應(yīng)位移也會隨之變化。歸納得出一定的變化規(guī)律,為穹頂結(jié)構(gòu)的抗震設(shè)計(jì)提供參考。而且,為保證結(jié)構(gòu)的安全性,分別選取天津波、EL-centro和TFAT三種典型的地震波進(jìn)行了多維地震響應(yīng)分析,應(yīng)用時(shí)程分析法計(jì)算結(jié)構(gòu)的節(jié)點(diǎn)位移。 本文進(jìn)一步研究了大跨屋蓋結(jié)構(gòu)在行波作用下的地震反應(yīng),相比較于一致激勵(lì),多點(diǎn)激勵(lì)對鋼拱薄殼穹頂?shù)挠绊戄^大,但由于結(jié)構(gòu)的跨度僅為40米,行波作用表現(xiàn)不明顯,進(jìn)一步證明大跨鋼拱薄殼穹頂在地震作用下是安全的,不會發(fā)生大面積破壞。
[Abstract]:With the increasing demand for large span space structure in public buildings, traffic buildings and large industrial buildings, all kinds of large span space structures have been widely used. Long span space structures have reasonable shape. The advantages of good mechanical performance and economic beauty are one of the forms of rapid development at present. A large number of new technologies new technologies and new materials have been adopted in the continuous innovation and development of long-span space structures. The large span space structure is more convenient for construction and has stronger practicability. The steel arch thin shell dome structure is more and more used in the urban building structure. For a large number of complex, the emergence of a new type of large span roof. All kinds of mechanical characteristics and safety and stability are concerned by many scientists and designers. This paper is based on the large span steel arch thin shell dome of a construction company. The dynamic characteristics of long-span steel arch domes under earthquake are analyzed. Firstly, the main methods of seismic response analysis are introduced. The seismic response analysis methods of long-span roof structures include mode decomposition response spectrum method and random vibration method, and then the vibration mode decomposition response spectrum method and time-history analysis method are used to study and analyze the structure. Based on finite element method (FEM), a large scale finite element analysis software ANSYS is used to simulate and analyze the large span steel arch thin shell dome. The seismic spectrum and seismic wave are applied to the structure separately. The node displacement of the structure under earthquake is calculated by software, and the safety of the structure under earthquake is determined. At the same time, in order to further study the dynamic characteristics of large-span steel arch and thin shell dome. The influence of different parameters on the dynamic performance of the structure is considered. When the dome of long span steel arch is changed with the number of stiffened ribs and the thickness of thin shell. The response displacement will also change under the earthquake. A certain law of change is concluded to provide a reference for the seismic design of the dome structure. Moreover, in order to ensure the safety of the structure, the Tianjin wave is selected separately. Three typical seismic waves, EL-centro and TFAT, are used to analyze the multi-dimensional seismic response, and the nodal displacement of the structure is calculated by time-history analysis. In this paper, the seismic response of long-span roof structure under traveling wave is further studied. Compared with uniform excitation, multi-point excitation has a great influence on the steel arch thin shell dome, but the span of the structure is only 40 meters. The action of traveling wave is not obvious which further proves that the dome with long span steel arch and thin shell is safe under earthquake action and will not be destroyed in large area.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU311.3

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本文編號：1460303