【摘要】： 本文以煙臺龍口南山集團(tuán)會展中心X區(qū)的輻射式張弦梁結(jié)構(gòu)為背景,采用有限元軟件SAP2000,對結(jié)構(gòu)進(jìn)行了模態(tài)分析,得到了結(jié)構(gòu)的自振特性,并討論了支座節(jié)點(diǎn)、預(yù)應(yīng)力、撐桿位置等參數(shù)對結(jié)構(gòu)模態(tài)特性的影響；對結(jié)構(gòu)進(jìn)行了時程分析,并結(jié)合工程特點(diǎn),對結(jié)構(gòu)的單榀桁架進(jìn)行了的穩(wěn)定性分析。 研究結(jié)果表明：預(yù)應(yīng)力拉索增大了結(jié)構(gòu)剛度,減小了變形。結(jié)構(gòu)的自振頻率較小；由于索的振動作用,對稱結(jié)構(gòu)沒有成對出現(xiàn)對稱振型；模態(tài)分析的討論表明：支座節(jié)點(diǎn)對結(jié)構(gòu)的高階模態(tài)影響較為明顯；拉索的初始預(yù)應(yīng)力對結(jié)構(gòu)的自振頻率幾乎沒有影響,撐桿的數(shù)量對結(jié)構(gòu)的高階振型有微小影響。時程分析顯示在地震波的激勵下結(jié)構(gòu)的時程曲線性質(zhì)基本相同,在激勵時間內(nèi)表現(xiàn)穩(wěn)定,結(jié)構(gòu)的抗震性能良好；結(jié)構(gòu)的非線性屈曲荷載遠(yuǎn)小于其線性的屈曲荷載,在進(jìn)行大跨度的結(jié)構(gòu)設(shè)計時要充分考慮穩(wěn)定性對結(jié)構(gòu)安全性的影響,進(jìn)行非線性的屈曲分析。 研究結(jié)果表明：輻射式張弦梁結(jié)構(gòu)時受力性能良好,抗震性能和穩(wěn)定性優(yōu)良,可以滿足大跨度結(jié)構(gòu)的使用要求,廣泛應(yīng)用于工程實(shí)際。
[Abstract]:In this paper, based on the radiation beam string structure in the X area of Yantai Longkou Nanshan Group Exhibition Center, the modal analysis of the structure is carried out by using finite element software SAP2000, and the natural vibration characteristics of the structure are obtained, and the bearing joints and prestress are discussed. The influence of bracing position and other parameters on the modal characteristics of the structure is analyzed, and the time history analysis of the structure is carried out, and the stability analysis of the single truss is carried out in combination with the engineering characteristics. The results show that the prestressing cable increases the stiffness of the structure and reduces the deformation. The vibration frequency of the structure is small, because of the vibration of the cable, the symmetrical vibration of the symmetrical structure does not appear in pairs, and the discussion of the modal analysis shows that the influence of the support node on the higher-order modes of the structure is obvious. The initial prestress of cable has little effect on the natural vibration frequency of the structure, and the number of strut has little effect on the higher vibration mode of the structure. The time-history analysis shows that the time-history curve of the structure under the excitation of seismic wave is basically the same, and it is stable in the excitation time, and the seismic performance of the structure is good, and the nonlinear buckling load of the structure is far less than the linear buckling load of the structure. The influence of stability on structural safety should be taken into account in the design of long span structures, and nonlinear buckling analysis should be carried out. The results show that the radiation beam string structure has good mechanical performance, good seismic performance and good stability. It can meet the requirements of large span structure and is widely used in engineering practice.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：TU399

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 欒翠翠;巨型鋼框架結(jié)構(gòu)中巨型梁的布置對整體結(jié)構(gòu)抗震性能的影響以及巨型梁的優(yōu)化設(shè)計[D];西南交通大學(xué);2012年

2 胡瑞星;輸煤棧橋鋼桁架的動力特性分析及振動控制研究[D];西安建筑科技大學(xué);2012年

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本文編號：2213975