鋼結(jié)構(gòu)交錯桁架體系的高等分析
發(fā)布時間：2019-02-13 04:27
【摘要】：交錯桁架結(jié)構(gòu)體系是鋼結(jié)構(gòu)中的一種新型承重結(jié)構(gòu)體系,國內(nèi)外對鋼結(jié)構(gòu)交錯桁架體系的結(jié)構(gòu)布置、經(jīng)濟(jì)性能、受力特點(diǎn)、樓板和鋼桁架共同作用、上下部結(jié)構(gòu)共同作用、結(jié)構(gòu)靜力和動力彈塑性分析、結(jié)構(gòu)靜力彈性實(shí)驗(yàn)、靜力和動力簡化計算方法、柱子計算長度、節(jié)點(diǎn)構(gòu)造等方面進(jìn)行了研究,也已建成了許多交錯桁架結(jié)構(gòu)體系的建筑,但至今還沒有人對鋼結(jié)構(gòu)交錯桁架體系的高等分析方法進(jìn)行研究。本文結(jié)合國家自然科學(xué)基金(50808096)資助項目,首次對鋼結(jié)構(gòu)交錯桁架體系的高等分析方法進(jìn)行了研究,旨在滿足結(jié)構(gòu)設(shè)計的需要,推動鋼結(jié)構(gòu)交錯桁架結(jié)構(gòu)體系的盡快發(fā)展,填補(bǔ)國內(nèi)外在鋼結(jié)構(gòu)交錯桁架結(jié)構(gòu)體系的高等分析研究方面的空白。 本論文主要完成了以下工作：首先,根據(jù)連續(xù)介質(zhì)力學(xué)理論構(gòu)造出鋼結(jié)構(gòu)交錯桁架體系空間單元的幾何剛度矩陣和彈塑性剛度矩陣,算例分析表明這些矩陣能準(zhǔn)確地計算出結(jié)構(gòu)的空間二階效應(yīng)和空間單元彈塑性桿端力增量,計算結(jié)果具有良好的精度。其次,通過對交錯桁架結(jié)構(gòu)的一些算例對比,首次提出了支撐交錯桁架結(jié)構(gòu)這一新型交錯桁架結(jié)構(gòu)體系,該體系很好的解決了傳統(tǒng)交錯桁架體系側(cè)向剛度較弱的問題。再次,為方便工程設(shè)計,本文首次提出了能同時考慮二階效應(yīng)、幾何缺陷、構(gòu)件截面的塑性發(fā)展和殘余應(yīng)力的交錯桁架結(jié)構(gòu)體系的簡化設(shè)計方法,該方法的優(yōu)點(diǎn)是利用基于精細(xì)塑性鉸方法修改后的單元剛度矩陣,比較準(zhǔn)確的計算鋼結(jié)構(gòu)交錯桁架體系的內(nèi)力和穩(wěn)定承載力,該方法具有較強(qiáng)的可操作性。 通過對交錯桁架結(jié)構(gòu)體系工作性能的研究,可以得出如下結(jié)論： 1.交錯桁架體系的縱向剛度明顯弱于橫向剛度,要保證縱向剛度滿足規(guī)范要求,宜設(shè)置支撐體系來增加結(jié)構(gòu)縱向剛度,改善結(jié)構(gòu)在兩個主軸方向剛度相差較大的現(xiàn)象； 2.縱向支撐的布置能明顯減小樓層位移和層間位移角,有效提高縱向抗側(cè)剛度,從而提高結(jié)構(gòu)的抗震和抗風(fēng)性能； 3.人字形支撐相比較于十字形支撐、V形支撐來說,適用性、經(jīng)濟(jì)性更好; 4.交錯桁架結(jié)構(gòu)中大部分構(gòu)件能均處于軸心受力的狀態(tài),可充分地發(fā)揮材料的性能,降低結(jié)構(gòu)的自重,從而達(dá)到節(jié)約材料,降低結(jié)構(gòu)造價的目的。 5.交錯桁架結(jié)構(gòu)體系的最大層間位移角都發(fā)生在底部幾層,因此,設(shè)計交錯桁架結(jié)構(gòu)體系時,應(yīng)加強(qiáng)底部幾層的設(shè)計。 6.結(jié)構(gòu)的高寬比變化對結(jié)構(gòu)的二階效應(yīng)和極限承載力的有較大的影響。當(dāng)高寬比增大時結(jié)構(gòu)的二階效應(yīng)增大,極限承載力減小。
[Abstract]:Staggered truss structure system is a new type of load-bearing structure system in steel structure. The static and dynamic elastoplastic analysis, the static elastic experiment, the simplified calculation method of static and dynamic force, the calculation length of columns and the structure of joints have been studied, and many buildings of staggered truss structure have been built. But up to now, no one has studied the advanced analysis method of staggered truss system of steel structure. In this paper, based on the project supported by the National Natural Science Foundation (50808096), the advanced analysis method of staggered truss system of steel structure is studied for the first time in order to meet the needs of structural design and promote the development of staggered truss structure system of steel structure as soon as possible. Fill in the gap in the advanced analysis and research of steel staggered truss structure system at home and abroad. The main work of this thesis is as follows: firstly, the geometric stiffness matrix and elastic-plastic stiffness matrix of spatial element of steel staggered truss system are constructed according to continuum mechanics theory. The numerical examples show that these matrices can accurately calculate the spatial second order effect of the structure and the end force increment of the elastic-plastic bar of the spatial element, and the calculation results have good accuracy. Secondly, through the comparison of some examples of staggered truss structure, a new type of staggered truss structure system is proposed for the first time, which solves the problem of weak lateral stiffness of traditional staggered truss system. Thirdly, in order to facilitate engineering design, a simplified design method of staggered truss structure system is proposed, which can take into account the second order effect, geometric defect, plastic development of member section and residual stress for the first time. The advantage of this method is that the internal force and stable bearing capacity of steel structure staggered truss system can be calculated accurately by using the modified element stiffness matrix based on the fine plastic hinge method. This method has strong maneuverability. Through the study of the performance of staggered truss structure system, the following conclusions can be drawn: 1. The longitudinal stiffness of staggered truss system is obviously weaker than that of transverse stiffness. In order to ensure that the longitudinal stiffness meets the requirements of the code, bracing system should be set up to increase the longitudinal stiffness of the structure, and to improve the phenomenon that the stiffness difference between the two main axes is large; 2. The arrangement of longitudinal bracing can obviously reduce the displacement angle between floor and floor, effectively improve the longitudinal lateral stiffness, thus improve the seismic and wind-resistant performance of the structure. 3. The herringbone bracing is more suitable and economical than the cross bracing and the V-shaped bracing. 4. Most of the members in staggered truss structure are in the state of axial force, which can give full play to the performance of material, reduce the weight of structure, and achieve the purpose of saving material and reducing the cost of structure. 5. The maximum interstory displacement angle of staggered truss structure system occurs in the bottom layers, so the design of the bottom layers should be strengthened when designing the staggered truss structure system. 6. The aspect ratio of the structure has great influence on the second order effect and ultimate bearing capacity of the structure. When the aspect ratio increases, the second order effect increases and the ultimate bearing capacity decreases.
【學(xué)位授予單位】：蘭州大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：TU391
本文編號：2421178
[Abstract]:Staggered truss structure system is a new type of load-bearing structure system in steel structure. The static and dynamic elastoplastic analysis, the static elastic experiment, the simplified calculation method of static and dynamic force, the calculation length of columns and the structure of joints have been studied, and many buildings of staggered truss structure have been built. But up to now, no one has studied the advanced analysis method of staggered truss system of steel structure. In this paper, based on the project supported by the National Natural Science Foundation (50808096), the advanced analysis method of staggered truss system of steel structure is studied for the first time in order to meet the needs of structural design and promote the development of staggered truss structure system of steel structure as soon as possible. Fill in the gap in the advanced analysis and research of steel staggered truss structure system at home and abroad. The main work of this thesis is as follows: firstly, the geometric stiffness matrix and elastic-plastic stiffness matrix of spatial element of steel staggered truss system are constructed according to continuum mechanics theory. The numerical examples show that these matrices can accurately calculate the spatial second order effect of the structure and the end force increment of the elastic-plastic bar of the spatial element, and the calculation results have good accuracy. Secondly, through the comparison of some examples of staggered truss structure, a new type of staggered truss structure system is proposed for the first time, which solves the problem of weak lateral stiffness of traditional staggered truss system. Thirdly, in order to facilitate engineering design, a simplified design method of staggered truss structure system is proposed, which can take into account the second order effect, geometric defect, plastic development of member section and residual stress for the first time. The advantage of this method is that the internal force and stable bearing capacity of steel structure staggered truss system can be calculated accurately by using the modified element stiffness matrix based on the fine plastic hinge method. This method has strong maneuverability. Through the study of the performance of staggered truss structure system, the following conclusions can be drawn: 1. The longitudinal stiffness of staggered truss system is obviously weaker than that of transverse stiffness. In order to ensure that the longitudinal stiffness meets the requirements of the code, bracing system should be set up to increase the longitudinal stiffness of the structure, and to improve the phenomenon that the stiffness difference between the two main axes is large; 2. The arrangement of longitudinal bracing can obviously reduce the displacement angle between floor and floor, effectively improve the longitudinal lateral stiffness, thus improve the seismic and wind-resistant performance of the structure. 3. The herringbone bracing is more suitable and economical than the cross bracing and the V-shaped bracing. 4. Most of the members in staggered truss structure are in the state of axial force, which can give full play to the performance of material, reduce the weight of structure, and achieve the purpose of saving material and reducing the cost of structure. 5. The maximum interstory displacement angle of staggered truss structure system occurs in the bottom layers, so the design of the bottom layers should be strengthened when designing the staggered truss structure system. 6. The aspect ratio of the structure has great influence on the second order effect and ultimate bearing capacity of the structure. When the aspect ratio increases, the second order effect increases and the ultimate bearing capacity decreases.
【學(xué)位授予單位】：蘭州大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：TU391
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 劉永健,姜美文,魏遵祥;水平荷載作用下交錯桁架結(jié)構(gòu)的簡化計算[J];長沙交通學(xué)院學(xué)報;2003年04期
2 周緒紅,周期石,黃湘湘;豎向荷載作用下交錯桁架結(jié)構(gòu)的內(nèi)力計算[J];工程力學(xué);2004年03期
3 周緒紅,莫濤,蔡益燕,魏潮文;新型交錯桁架結(jié)構(gòu)體系的應(yīng)用[J];鋼結(jié)構(gòu);2000年02期
4 周緒紅,莫濤,劉永健;輕鋼交錯桁架結(jié)構(gòu)體系與鋼框架的對比分析[J];鋼結(jié)構(gòu);2001年02期
5 蔡益燕,張躍峰,申林;交錯桁架體系抗震性能[J];鋼結(jié)構(gòu);2001年04期
6 張躍峰;建筑中的錯列桁架結(jié)構(gòu)體系[J];鋼結(jié)構(gòu);2001年05期
7 李君,張耀春;高層鋼結(jié)構(gòu)的非線性動力全過程分析方法[J];哈爾濱建筑大學(xué)學(xué)報;2000年01期
8 張文元,張耀春;高層鋼結(jié)構(gòu)雙重非線性分析的塑性鉸法[J];哈爾濱建筑大學(xué)學(xué)報;2000年06期
9 張文元,張耀春;空間受力鋼柱的雙重非線性分析[J];哈爾濱建筑大學(xué)學(xué)報;2000年06期
10 梁啟智,梁平;高層建筑跳層桁架體系側(cè)力作用的結(jié)構(gòu)分析[J];華南理工大學(xué)學(xué)報(自然科學(xué)版);1996年06期
，本文編號：2421178
本文鏈接：http://sikaile.net/kejilunwen/sgjslw/2421178.html
最近更新
教材專著
