筒形交叉环管—索网幕墙设计与施工关键技术研究
发布时间：2019-06-02 08:23
【摘要】：筒形交叉环管-索网幕墙主要由交叉环管骨架和马鞍形单层索网组成。8个椭圆形环管以与地面呈一定角度放置,在空间上相互交叉形成56个区格,作为幕墙支承骨架；幕墙索网被骨架环管分割,形成相对独立的56片索网填充于骨架区格内。交叉环管和索网共同构成幕墙主体,底部通过支座与裙楼相连,顶部通过连接杆件与屋盖结构相连,立面上布置大量伞状支撑与主体结构相连,从而使幕墙依附于主体结构。此类结构具有体型大、造型美观等特点,但构件布置复杂,拉索数量巨大,索力相互影响大,结构受力复杂,给设计及施工都带来了相当大的难度。武汉万达汉秀剧场项目为大型水上表演中心,富有浓郁中国元素的传统“红灯笼”造型极好地诠释了汉文化的特点,而筒形交叉环管-索网幕墙形象地表现了这一造型。本文结合该项目,对筒形交叉环管-索网幕墙进行了索网找形-找力方法的应用研究,结构动力特性与荷载分析,施工方法及施工全过程模拟分析的研究,索夹抗滑移性能试验研究及关键节点性能研究。以下就此分别进行介绍：对索网结构的常见形式及工程应用进行了归纳总结。索网结构主要应用于场馆屋盖结构及玻璃幕墙中,而武汉万达汉秀剧场项目中索网结构应用于碟片式镂空幕墙中,与常规屋盖索网结构的水平向布置不同,又与封闭式玻璃幕墙不同,具有其独特之处。对该幕墙的工程概况及结构特点进行介绍。对索网结构的找形-找力进行了细致的研究。为了找到满足已知预应力状态力学平衡条件和结构边界条件的曲面,需要对结构进行找形分析,理论方面分别从非线性有限元法的拉索单元位移函数、UL坐标列式的拉索单元、非线性平衡方程的求解方法以及非线性有限元法找形的具体方法进行了研究。编制了相应的计算程序,利用小弹性模量找形法对索网进行找形,在不考虑拉索及索夹自重的条件下找到满足预定等效预张力的索网形态。同时从拉索等效预张力的施加、迭代法找力分析理论两个方面对结构找力分析进行了研究。同样在不考虑索网及索夹自重条件下找到与找形结果相对应的索力分布,并在此初始平衡态下考虑索网及索夹自重,得到恒载初始态下的索力分布。在几何大变形下求解结构平衡刚度,基于恒载初始态的刚度求解结构的动力特性,该幕墙结构自振频率密集,振型以局部弯曲为主。研究处于恒载初始态的索网结构在外荷载作用下的性能。索网幕墙自重轻、刚度小,属于风敏感型结构,重点研究在风荷载作用下的结构性能。由于镂空幕墙没有防水防撞等要求,故虽索网在正常使用极限状态下变形较大但仍能满足要求。承载能力极限状态下结构应力适中,安全且经济。在极限风荷载作用下钢结构部分未见明显刚度退化,而索网由于几何效应刚度更是有所增加。除风荷载外,温度作用对预应力索网结构的预张力将产生一定影响,进而影响索网的整体刚度,故温度作用也作为重要荷载进行分析。分析结果显示,±30℃的温度荷载对索网变形的影响为风荷载引起变形的1/27左右。索网幕墙结构拉索数量大,结构整体性强,不同的施工顺序对工程量、施工精度、工期等都有很大影响。通过协调各目标间的矛盾,确定合理的施工顺序,并据此进行施工全过程模拟分析,掌控施工过程结构安全并为拉索张拉控制力提供参考。索夹的抗滑移性能与关键节点的受力性能良好是满足结构设计假定的重要保证。对索夹抗滑移性能进行了试验研究,结果显示索夹的最大抵抗不平衡力约为11kN。对关键节点的受力性能进行实体有限元分析,对不满足结构要求的节点提出针对性的加固措施。最后,对本文的研究工作进行了总结,指出本文的主要研究结论及需要继续研究的问题。
[Abstract]:The cylindrical cross-loop-cable net curtain wall is mainly composed of a cross-loop framework and a saddle-shaped single-layer cable net, And a relatively independent 56-piece cable mesh is formed in the framework region lattice. The cross loop and the cable net together form a curtain wall main body, the bottom of the curtain wall body is connected with the skirt building through a support, the top part is connected with the roof structure through the connecting rod, a large number of umbrella-shaped support is arranged on the vertical surface and is connected with the main body structure, and the curtain wall is attached to the main body structure. The structure has the characteristics of large body size, beautiful shape and the like, but the structure of the component is complex, the number of the cables is large, the cable force is large, the structure is complex, and the design and the construction are very difficult. Wuhan Wanda-Hanxiu Theater project is a large-scale water performance center, and the traditional "red lantern" of the rich Chinese elements has a good interpretation of the characteristics of the Han culture, while the cylindrical cross-loop-cable-net curtain wall has shown this shape. In this paper, the research on the application of the cable-net-finding-force-finding method for the cylindrical cross-loop-cable-net curtain wall is carried out in this paper, and the research of the structural dynamic characteristics and the load analysis, the construction method and the simulation and analysis of the whole process of the construction, the research on the anti-slip performance of the cable clamp and the performance of the key nodes are studied. The general form and application of the cable net structure are summarized in this paper. The structure of the cable net is mainly applied to the structure of the roof of the venue and the glass curtain wall, and the structure of the cable net in the project of the Wuhan Wanda Hanxiu Theater is applied to the disc-type hollow curtain wall, and is different from the horizontal direction of the conventional roof cable net structure, and is different from the closed glass curtain wall, and has the unique advantages. The general situation and structural characteristics of the curtain wall are introduced. The finding-finding force of the cable net structure is studied in detail. in ord to find a curved surface that satisfy that mechanical balance condition and the structural boundary condition of the known pre-stressed state, the structure can be shaped and analyzed, the cable unit of the cable unit of the non-linear finite element method, the cable unit of the UL coordinate system are respectively derived from the theoretical aspect, The solution of the nonlinear equilibrium equation and the method of finding the shape of the nonlinear finite element method are studied. A corresponding calculation program was prepared to find the shape of the cable net by using the method of small elastic modulus to find the shape of the cable net satisfying the pre-tension of the cable and the cable clamp under the condition of not considering the self weight of the cable and the cable clamp. At the same time, the force analysis of the structure is studied in terms of the application of the equivalent pre-tension of the cable, the iterative method and the theory of force analysis. And the cable force distribution corresponding to the finding result is found under the condition that the cable net and the cable clamp are not taken into consideration, and the cable net and the cable clamp self-weight are taken into consideration in the initial equilibrium state to obtain the cable force distribution under the constant load initial state. The dynamic characteristic of the structure is solved by the stiffness of the initial state of the constant load, and the natural frequency of the curtain wall structure is dense and the vibration mode is mainly based on the local bending. The performance of the cable net structure under the influence of the external load is studied. The cable net curtain wall has light self-weight and small rigidity, and belongs to the wind-sensitive structure, and focuses on the structural performance under the action of wind load. Because the hollow curtain wall does not have the requirements of water-proof and anti-collision, the deformation of the cable net in the normal use limit state can still meet the requirements. The structural stress is moderate, safe and economical in the limit state of bearing capacity. There is no significant stiffness degradation of the steel structure under the limit wind load, and the stiffness of the cable net is increased due to the geometric effect. In addition to the wind load, the effect of temperature on the pre-tension of the pre-stressed cable net structure will have a certain effect, and further influence the overall stiffness of the cable net, so the temperature effect is also analyzed as an important load. The results show that the effect of the temperature load of 30 鈩，
本文编号：2490957
[Abstract]:The cylindrical cross-loop-cable net curtain wall is mainly composed of a cross-loop framework and a saddle-shaped single-layer cable net, And a relatively independent 56-piece cable mesh is formed in the framework region lattice. The cross loop and the cable net together form a curtain wall main body, the bottom of the curtain wall body is connected with the skirt building through a support, the top part is connected with the roof structure through the connecting rod, a large number of umbrella-shaped support is arranged on the vertical surface and is connected with the main body structure, and the curtain wall is attached to the main body structure. The structure has the characteristics of large body size, beautiful shape and the like, but the structure of the component is complex, the number of the cables is large, the cable force is large, the structure is complex, and the design and the construction are very difficult. Wuhan Wanda-Hanxiu Theater project is a large-scale water performance center, and the traditional "red lantern" of the rich Chinese elements has a good interpretation of the characteristics of the Han culture, while the cylindrical cross-loop-cable-net curtain wall has shown this shape. In this paper, the research on the application of the cable-net-finding-force-finding method for the cylindrical cross-loop-cable-net curtain wall is carried out in this paper, and the research of the structural dynamic characteristics and the load analysis, the construction method and the simulation and analysis of the whole process of the construction, the research on the anti-slip performance of the cable clamp and the performance of the key nodes are studied. The general form and application of the cable net structure are summarized in this paper. The structure of the cable net is mainly applied to the structure of the roof of the venue and the glass curtain wall, and the structure of the cable net in the project of the Wuhan Wanda Hanxiu Theater is applied to the disc-type hollow curtain wall, and is different from the horizontal direction of the conventional roof cable net structure, and is different from the closed glass curtain wall, and has the unique advantages. The general situation and structural characteristics of the curtain wall are introduced. The finding-finding force of the cable net structure is studied in detail. in ord to find a curved surface that satisfy that mechanical balance condition and the structural boundary condition of the known pre-stressed state, the structure can be shaped and analyzed, the cable unit of the cable unit of the non-linear finite element method, the cable unit of the UL coordinate system are respectively derived from the theoretical aspect, The solution of the nonlinear equilibrium equation and the method of finding the shape of the nonlinear finite element method are studied. A corresponding calculation program was prepared to find the shape of the cable net by using the method of small elastic modulus to find the shape of the cable net satisfying the pre-tension of the cable and the cable clamp under the condition of not considering the self weight of the cable and the cable clamp. At the same time, the force analysis of the structure is studied in terms of the application of the equivalent pre-tension of the cable, the iterative method and the theory of force analysis. And the cable force distribution corresponding to the finding result is found under the condition that the cable net and the cable clamp are not taken into consideration, and the cable net and the cable clamp self-weight are taken into consideration in the initial equilibrium state to obtain the cable force distribution under the constant load initial state. The dynamic characteristic of the structure is solved by the stiffness of the initial state of the constant load, and the natural frequency of the curtain wall structure is dense and the vibration mode is mainly based on the local bending. The performance of the cable net structure under the influence of the external load is studied. The cable net curtain wall has light self-weight and small rigidity, and belongs to the wind-sensitive structure, and focuses on the structural performance under the action of wind load. Because the hollow curtain wall does not have the requirements of water-proof and anti-collision, the deformation of the cable net in the normal use limit state can still meet the requirements. The structural stress is moderate, safe and economical in the limit state of bearing capacity. There is no significant stiffness degradation of the steel structure under the limit wind load, and the stiffness of the cable net is increased due to the geometric effect. In addition to the wind load, the effect of temperature on the pre-tension of the pre-stressed cable net structure will have a certain effect, and further influence the overall stiffness of the cable net, so the temperature effect is also analyzed as an important load. The results show that the effect of the temperature load of 30 鈩，
本文编号：2490957
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2490957.html
