本文選題：屈曲約束支撐 + 雙層柱面網(wǎng)殼�。� 參考：《蘭州理工大學(xué)》2013年碩士論文

【摘要】：隨著大跨度空間結(jié)構(gòu)的快速發(fā)展,有關(guān)網(wǎng)殼結(jié)構(gòu)抗震性能的研究越來越受到關(guān)注。近幾十年來,專家學(xué)者對結(jié)構(gòu)的消能、減震做出了許多的工作,并且取得豐碩的成果,結(jié)構(gòu)設(shè)計從此不再是單純依靠增強梁、墻、柱的剛度來達到抵抗地震作用的目的,而是可以利用消能減震裝置更有效地起到減小地震作用造成的破壞。 屈曲約束支撐(BRBs)是一種可以有效避免支撐失穩(wěn)的減震構(gòu)件,它主要是由外圍約束構(gòu)件以及核心鋼構(gòu)件兩部分構(gòu)成,當(dāng)軸向荷載作用在此支撐上時,屈曲約束支撐的核心部分受到拉、壓力作用,均可以使支撐達到完全屈服,支撐屈服的過程就起到了耗能的作用,以此保護主體結(jié)構(gòu)。但在當(dāng)前,對于屈曲約束支撐減震研究及應(yīng)用只限于在一般結(jié)構(gòu)當(dāng)中,而在大跨度空間結(jié)構(gòu)中的減震性能的研究目前還是處于初步階段。工程中由于單層網(wǎng)殼結(jié)構(gòu)的穩(wěn)定性問題尤為突出,隨著新建結(jié)構(gòu)跨度的不斷增大,許多網(wǎng)殼結(jié)構(gòu)工程都被設(shè)計成雙層網(wǎng)殼。本文擬利用考慮下部混凝土結(jié)構(gòu)的雙層柱面網(wǎng)殼作為研究對象,探討屈曲約束支撐在該結(jié)構(gòu)中的適用性以及減震規(guī)律性。 主要工作從以下幾個方面進行： (1)利用有限元分析軟件ANSYS,按照雙層柱面網(wǎng)殼結(jié)構(gòu)形式以及桿件連接規(guī)律編寫程序,實現(xiàn)自動化建模。模型中假定網(wǎng)殼桿件及屈曲約束支撐桿件均為理想彈塑性模型,同時下部混凝土構(gòu)件為符合雙線性隨動強化模型； (2)對考慮下部混凝土結(jié)構(gòu)協(xié)同工作的雙層柱面網(wǎng)殼進行靜力、模態(tài)分析,依據(jù)靜力以及模態(tài)分析結(jié)果得出結(jié)構(gòu)變形特性、節(jié)點各向位移分布以及自振頻率,并依此合理考慮屈曲約束支撐布置位置及數(shù)量； (3)動力時程分析,通過對結(jié)構(gòu)輸入三維地震波,得出關(guān)鍵節(jié)點各向位移減震規(guī)律以及桿件軸力減震規(guī)律,然后分析對比不同布置方式的減震規(guī)律,總結(jié)不同的布置方式對結(jié)構(gòu)減震性能的影響； (4)對一實例模型分別采用不同種類地震波以及不同加速度峰值地震波,進行結(jié)構(gòu)計算分析,比較減震效果之間的差異,并總結(jié)出相關(guān)規(guī)律。
[Abstract]:With the rapid development of large span space structures, more and more attention has been paid to the seismic behavior of latticed shell structures. In recent decades, experts and scholars have done a lot of work on the energy dissipation and shock absorption of structures, and have achieved fruitful results. From now on, structural design is no longer simply relying on strengthening the stiffness of beams, walls and columns to achieve the purpose of resisting earthquake. Instead, energy dissipation devices can be used to reduce the damage caused by earthquakes more effectively. Buckling restrained bracing (BRBs) is a kind of shock absorption member which can effectively avoid the instability of braces. It is mainly composed of external restrained members and core steel members. When the axial load is acting on the braces, When the core part of buckling restrained braces is pulled and subjected to pressure, the bracing can be completely subdued, and the process of bracing yield plays a role of energy dissipation, thus protecting the main structure. However, at present, the research and application of buckle-constrained braces are limited to general structures, but the study of seismic absorption performance in long-span spatial structures is still at a preliminary stage. In engineering, the stability of single-layer latticed shell structure is very serious. With the increasing span of new structure, many latticed shell structures are designed as double-layer latticed shells. In this paper, the applicability of buckling restrained braces in the structure and the regularity of vibration absorption are discussed by using the double-layer cylindrical reticulated shell with consideration of the lower concrete structure as the research object. The main work is as follows: 1) using finite element analysis software ANSYS, according to the structure form of double-layer cylindrical latticed shell and the rules of link connection, the automatic modeling is realized. In the model, it is assumed that the latticed shell member and buckling restrained bracing member are ideal elastic-plastic model, while the lower part of concrete member is in accordance with the bilinear follow-up strengthening model. (2) static and modal analysis of double-layer cylindrical reticulated shell considering the cooperative work of lower concrete structure is carried out. According to the results of static and modal analysis, the deformation characteristics of the structure, the displacement distribution in each direction of the node and the natural vibration frequency are obtained. According to this, the position and quantity of buckling restrained bracing are considered reasonably. The dynamic time history analysis, through the input of 3D seismic wave to the structure, the law of vibration absorption of every direction displacement of the key node and the law of the axial force damping of the member are obtained. Then it analyzes and compares the seismic absorption laws of different arrangement modes, summarizes the influence of different arrangement modes on the seismic absorption performance of the structure, and applies different kinds of seismic waves and different acceleration peak seismic waves to an example model. The structural calculation and analysis are carried out to compare the difference between the effect of shock absorption and to summarize the relevant laws.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU33;TU352.1

【參考文獻】

相關(guān)期刊論文 前10條

1 郭海山,錢宏亮,沈世釗;地震作用下單層球面網(wǎng)殼結(jié)構(gòu)的動力穩(wěn)定性[J];地震工程與工程振動;2003年01期

2 王秀麗;王磊;;新型橢球網(wǎng)殼減震體系性能分析[J];工程抗震與加固改造;2007年04期

3 陳國棟,郭彥林;非加勁板抗剪極限承載力[J];工程力學(xué);2003年02期

4 郭彥林,董全利;鋼板剪力墻的發(fā)展與研究現(xiàn)狀[J];鋼結(jié)構(gòu);2005年01期

5 王秀麗;陳祥勇;殷占忠;;約束屈曲支撐對K6型球面網(wǎng)殼減震效果的分析[J];甘肅科學(xué)學(xué)報;2007年01期

6 王秀麗;閆志剛;陳繼云;;單層球面網(wǎng)殼新型減震體系整體性能研究[J];廣西科學(xué);2008年03期

7 羅樹青,鄧長根,�；瘧�;抑制屈曲支撐的穩(wěn)定研究[J];華東船舶工業(yè)學(xué)院學(xué)報(自然科學(xué)版);2005年03期

8 曹資,張毅剛;單層球面網(wǎng)殼地震反應(yīng)特征分析[J];建筑結(jié)構(gòu);1998年08期

9 陳國棟,郭彥林;十字加勁鋼板剪力墻的抗剪極限承載力[J];建筑結(jié)構(gòu)學(xué)報;2004年01期

10 陳國棟,郭彥林,范珍,韓艷;鋼板剪力墻低周反復(fù)荷載試驗研究[J];建筑結(jié)構(gòu)學(xué)報;2004年02期

相關(guān)會議論文 前1條

1 沈世釗;;中國空間結(jié)構(gòu)理論研究20年進展[A];第十屆空間結(jié)構(gòu)學(xué)術(shù)會議論文集[C];2002年

相關(guān)碩士學(xué)位論文 前1條

1 蘇成江;約束屈曲支撐性能分析及在鋼框架中的應(yīng)用研究[D];蘭州理工大學(xué);2007年

，

本文編號：2042175