架空結(jié)構(gòu)快速拋填方案及構(gòu)件受力特性研究
發(fā)布時間：2018-11-05 14:01
【摘要】：基于目前的填海造地工程填料需求量大、施工工期長,本文探索一種新的快速填海方式,通過拋填大量的預(yù)制鋼筋混凝土構(gòu)件,依靠構(gòu)件之間的相互穿插、鉗制形成架空結(jié)構(gòu),構(gòu)件不斷堆積后,露出水面形成陸域。本文設(shè)計并制作了4種構(gòu)件的模型,分別為:箱籠型構(gòu)件、短四腳錐體構(gòu)件、長四腳錐體構(gòu)件和直桿構(gòu)件。通過大量的拋填試驗,以長四腳錐體構(gòu)件為底層,其余3種構(gòu)件以每層不同數(shù)量的組合制定出9種拋填方案,進行逐次拋填,并對拋填后的結(jié)構(gòu)進行靜載荷試驗,獲得荷載與沉降量的關(guān)系曲線。用正交試驗的數(shù)據(jù)處理方法分析每種方案結(jié)構(gòu)產(chǎn)生的單位沉降量,以單位沉降量最小者為最優(yōu)拋填方案;然后用最優(yōu)拋填方案進行拋填,逐個記錄每個構(gòu)件上所受作用力的位置和來源,用數(shù)理統(tǒng)計的方法對受力頻數(shù)進行分析,研究拋填后各種構(gòu)件的受力特性;最后用有限元軟件ABAQUS初步探索了受力方向?qū)γ糠N構(gòu)件最大拉應(yīng)力的影響規(guī)律。本文主要得到以下結(jié)論:(1)設(shè)計的9種拋填方案中,以每層均勻拋填直桿構(gòu)件效果最好,因為直桿起到了相鄰層箱籠型構(gòu)件之間的連接、鉗制作用,對減少沉降有利。(2)箱籠型構(gòu)件棱上受到作用力的位置最有可能在整個棱邊1/7處的附近,面上受到作用力概率最高的位置是外表面的正中間方孔邊的中點處。短四腳錐體和長四腳錐體的圓桿上,受到作用力的位置最有可能在桿頂部附近。直桿上最有可能受到作用力的位置是直桿的底部附近。(3)箱籠型構(gòu)件棱上受到作用力的來源主要是箱籠型構(gòu)件和短四腳錐體,面上的受力來源主要是短四腳錐體和直桿構(gòu)件。短四腳錐體受到作用力最主要的來源是箱籠型構(gòu)件。直桿構(gòu)件和長四腳錐體受力主要來源于箱籠型構(gòu)件和地面的支撐。(4)根據(jù)有限元軟件的計算結(jié)果,分析得到作用力方向?qū)ο浠\型構(gòu)件的最大拉應(yīng)力影響不大,對短四腳錐體、直桿構(gòu)件和長四腳錐體影響較大。
[Abstract]:Based on the large demand for filling materials and the long construction period, this paper explores a new rapid reclamation method. By throwing a large number of precast reinforced concrete members and relying on the interlacing of the members, an overhead structure is formed. After the continuous accumulation of components, exposed water to form a land. In this paper, the models of four kinds of components are designed and made, which are box cage member, short four-legged cone member, long four-legged cone member and straight bar member. Through a large number of dumping tests, taking the long four-legged pyramidal component as the bottom layer, the remaining three kinds of components are combined with different numbers of each layer to work out 9 kinds of throwing schemes, and to carry out successive dumping and static load tests on the structure after throwing. The curve of relationship between load and settlement is obtained. The data processing method of orthogonal test is used to analyze the unit settlement produced by each scheme structure. Then, the optimal scheme is used to fill each member. The position and source of the force acting on each member are recorded one by one. The force frequency of each member is analyzed by mathematical statistics method, and the mechanical characteristics of each member are studied. Finally, the influence of stress direction on the maximum tensile stress of each member is preliminarily investigated by using the finite element software ABAQUS. The main conclusions of this paper are as follows: (1) among the nine kinds of throwing schemes designed, the straight bar member with uniform throwing bar on each floor is the best, because the straight bar acts as a connection between the cage members of the adjacent layer box and acts as a clamping effect. (2) the position where the force is applied on the edge of the cage member is most likely to be near 1 / 7 of the whole edge, and the position with the highest probability of the force on the surface is at the middle point of the middle hole edge of the outer surface. The position of force is most likely near the top of the short quadruped cone and the long four-legged cone. The position where the force is most likely to be applied on the straight bar is near the bottom of the bar. (3) the source of the force on the edge of the cage member is mainly the box cage member and the short four-legged cone. The stress source on the plane is mainly short quadruped cone and straight bar member. The main source of the force acting on the short quadruped cone is the cage member. The force of straight bar member and long four-legged cone is mainly from box cage member and ground support. (4) according to the calculation results of finite element software, it is concluded that the direction of force has little effect on the maximum tensile stress of box cage member. It has a great influence on the short quadruped cone, the straight bar member and the long quadruped cone.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P756.8
本文編號：2312298
[Abstract]:Based on the large demand for filling materials and the long construction period, this paper explores a new rapid reclamation method. By throwing a large number of precast reinforced concrete members and relying on the interlacing of the members, an overhead structure is formed. After the continuous accumulation of components, exposed water to form a land. In this paper, the models of four kinds of components are designed and made, which are box cage member, short four-legged cone member, long four-legged cone member and straight bar member. Through a large number of dumping tests, taking the long four-legged pyramidal component as the bottom layer, the remaining three kinds of components are combined with different numbers of each layer to work out 9 kinds of throwing schemes, and to carry out successive dumping and static load tests on the structure after throwing. The curve of relationship between load and settlement is obtained. The data processing method of orthogonal test is used to analyze the unit settlement produced by each scheme structure. Then, the optimal scheme is used to fill each member. The position and source of the force acting on each member are recorded one by one. The force frequency of each member is analyzed by mathematical statistics method, and the mechanical characteristics of each member are studied. Finally, the influence of stress direction on the maximum tensile stress of each member is preliminarily investigated by using the finite element software ABAQUS. The main conclusions of this paper are as follows: (1) among the nine kinds of throwing schemes designed, the straight bar member with uniform throwing bar on each floor is the best, because the straight bar acts as a connection between the cage members of the adjacent layer box and acts as a clamping effect. (2) the position where the force is applied on the edge of the cage member is most likely to be near 1 / 7 of the whole edge, and the position with the highest probability of the force on the surface is at the middle point of the middle hole edge of the outer surface. The position of force is most likely near the top of the short quadruped cone and the long four-legged cone. The position where the force is most likely to be applied on the straight bar is near the bottom of the bar. (3) the source of the force on the edge of the cage member is mainly the box cage member and the short four-legged cone. The stress source on the plane is mainly short quadruped cone and straight bar member. The main source of the force acting on the short quadruped cone is the cage member. The force of straight bar member and long four-legged cone is mainly from box cage member and ground support. (4) according to the calculation results of finite element software, it is concluded that the direction of force has little effect on the maximum tensile stress of box cage member. It has a great influence on the short quadruped cone, the straight bar member and the long quadruped cone.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P756.8
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 樸正;馬小舟;董國海;;斜坡式防波堤人工護面塊體穩(wěn)定重量計算公式研究[J];中國港灣建設(shè);2013年03期
，本文編號：2312298
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