WO2019218679A1 - Cfrp悬带交叉索支结构 - Google Patents

Cfrp悬带交叉索支结构 Download PDF

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Publication number
WO2019218679A1
WO2019218679A1 PCT/CN2018/123667 CN2018123667W WO2019218679A1 WO 2019218679 A1 WO2019218679 A1 WO 2019218679A1 CN 2018123667 W CN2018123667 W CN 2018123667W WO 2019218679 A1 WO2019218679 A1 WO 2019218679A1
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cfrp
sling
outer ring
intersection
cross
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PCT/CN2018/123667
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English (en)
French (fr)
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刘越
田学帅
薛素铎
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北京工业大学
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/14—Suspended roofs

Definitions

  • the invention relates to a CFRP sling cross-rope structure, belonging to a novel single-layer cable-supporting structure system, which is mainly suitable for large-span spatial structure fields, such as a stadium, a gymnasium, an exhibition center and the like.
  • the cable-stayed structure is a load-bearing structure formed by a flexible cable and its edge members, and is mainly used in construction engineering.
  • the material of the cable can be made of steel wire bundle, steel wire rope, steel wire, chain, round steel and the like.
  • cable-stay structures are also widely used in large-span buildings such as stadiums, stadiums, exhibition halls and hangars.
  • the sling bridge is a load-bearing structure formed by a bridge deck supported by a flexible sling, and is mainly used in bridge engineering.
  • the material of the sling is mainly steel.
  • this paper proposes a CFRP sling cross-rope structure, which is used in the cable-stay structure.
  • the new material CFRP is used as a sling to replace steel.
  • the object of the present invention is to solve the problem that the existing building span is limited and the collapse resistance is insufficient, and a CFRP sling cross cable support structure is proposed.
  • the CFRP cable net can be set to a sunflower type, a square type or an irregular type as needed, and no inner ring is provided.
  • the CFRP sling is anchored to the outer ring of the circle, and the CFRP sling is clamped between the girders with gravity stiffness blocks.
  • the CFRP sling is deflected by the gravity of its own gravity and gravity stiffness to become a hovering line to withstand the downward load of the structure, such as its own weight and snow load; the upward wind suction is the gravity stiffness generated by the gravity stiffness block. resistance.
  • the CFRP sling cross-support structure adopts CFRP as the sling. Compared with the traditional steel sling, it can save material usage and reduce the structural weight, making the structure lighter and more economical.
  • the single-layer planar cable net is innovative in structural aesthetics; there is no inner ring, no key nodes, and the internal force of the structure is evenly distributed at each CFRP sling and node, and the structure has strong resistance to continuous collapse and good robustness.
  • the circular outer loop curve formula is as follows. Where r is the radius of the circle. In fact, it is the intersection of the xoy plane and the cylindrical surface. The origin of the xoy plane is the center point of the outer curve of the circle.
  • k, r are defined as the above irregular formula, Is a formula that is tangent to the vertical plane of the virtual inner ring, r 0 is the radius of the orthographic projection curve (which is a circle) of the virtual inner ring in the xoy plane, and (x 0 , y 0 ) is the orthographic projection curve (for a point on a ring).
  • the curve equation of the CFRP sling centerline is actually the catenary rotation surface intersecting with the vertical plane parallel to (or coincident with) the x-axis of the cylindrical surface or parallel to the y-axis ( Or coincident) the intersection of the vertical planes, and the two endpoints of the intersection are on the outer curve of the circle. Its formula is as follows:
  • k, r are defined as the above irregular formula
  • w is any real number, indicating the width of the square
  • i is an arbitrary natural number, only need to satisfy
  • r is the radius of the cylinder, ie the circle The radius of the outer loop curve of the orthographic projection curve (which is a circle) in the xoy plane.
  • k is the real constant determined by the density of the nodes with gravity stiffness and the density of the CFRP sling; a, b, c are the geometric parameters of the sling, which are any real numbers (only need to be satisfied) ), r is the radius of the cylinder, that is, the radius of the orthographic curve (which is a ring) of the outer curve of the circle in the xoy plane.
  • Construction process The side beams of the structure are assembled and spliced, and then all CFRP slings are assembled on the ground, then raised to a predetermined height, and the CFRP slings are step by step, and finally anchored to the side beams of the circular outer ring.
  • each CFRP sling can bear the load from the outside without using other CFRP slings, so it will not exit due to tearing of some other CFRP sling. Has a good resistance to continuous collapse performance.
  • the members in the structural system all adopt tensile members, and make full use of the excellent tensile properties of the CFRP sling, and the economy is remarkable.
  • the CFRP sling cross cable support structure of the invention has the advantages of superior structural component system, strong resistance to continuous collapse, good robustness, light structure, beautiful appearance and good economy.
  • Figure 1 is a schematic view of a sunflower pattern of a CFRP sling cross-cord structure
  • Figure 2 is a three-dimensional diagram of a sunflower type of a cross-support structure of CFRP sling
  • Figure 3 is a schematic diagram of a square lattice structure of a CFRP sling cross cable support structure
  • Figure 4 is a three-dimensional diagram of a CFRP sling cross cable support structure
  • Figure 5 is a schematic view of an irregular pattern of a cross-rope structure of a CFRP sling
  • Figure 6 is a three-dimensional diagram of an irregular type of CFRP sling cross cable support structure
  • Figure 7 is a schematic view of the CFRP sling
  • a CFRP sling cross cable support structure belongs to a novel cable net structure system and is mainly suitable for the space structure field.
  • the utility model comprises a cable net structure system in which a circular outer ring and a CFRP sling are alternately formed.
  • the CFRP sling web can be set to a sunflower type, a square type or an irregular type as needed, and no inner ring is provided.
  • the CFRP sling is anchored to the circular outer ring and the CFRP sling is clamped between the clamps.
  • the tensile force in the CFRP sling is provided by the compressed saddle-shaped side sill.
  • the utility model relates to a cross-supporting structure of a CFRP sling, which has the advantages of reasonable arrangement of structural members, strong resistance to continuous collapse, good robustness, light structure, beautiful appearance and good economy.
  • the outer ring of this structure is assembled and spliced, then all CFRP slings are assembled on the ground, then raised to the predetermined height, and the CFRP sling is step-by-step, and finally anchored on the side beam of the circular outer ring.

Abstract

CFRP悬带交叉索支结构适用于大跨度空间结构领域，包括一个平面圆形外环（1），CFRP悬带（2）采用波形锚锚固于圆形外环（1）上，CFRP悬带（2）两两交错形成平面索网，索网可根据需要设置成葵花型、方格型或不规则型，其交叉节点处布置重力刚度块（3）夹具夹持。本结构不设置内环，索力在CFRP悬带（2）中分布较为平均，一根CFRP悬带（2）的断裂不会引起结构整体的倒塌，结构抗连续倒塌的能力较强，结构的鲁棒性较好；本结构采用单层平面索网，利用各节点处的重力刚度块（3）抵抗风吸力，整体结构轻盈、美观；用CFRP悬带（2）替代传统的刚拉索，可节约用索量，降低结构总的造价，实现良好的经济性。

Description

CFRP悬带交叉索支结构 技术领域
本发明是一种CFRP悬带交叉索支结构，属于一种新型的单层索支结构体系，主要适用于大跨度空间结构领域，如体育场、体育馆、展览中心等。
背景技术
索支结构是由柔性受拉索及其边缘构件所形成的承重结构，主要应用于建筑工程中。其索的材料可以采用钢丝束、钢丝绳、钢铰线、链条、圆钢等材料。为了最大可能地形成室内无柱的大空间，以满足容纳比赛场地、大型展示和飞机的需要，像体育场、体育馆、展览馆和飞机库这样的大跨度建筑也广泛采用索支结构。
悬带桥是由柔性悬带支承其上的桥面板所形成的承重结构，主要应用于桥梁工程中。悬带的材料主要是采用钢材。
为了满足大空间、大跨度等的要求，同时为了使结构变的更加安全和轻盈，本文提出了一种CFRP悬带交叉索支结构，是把悬带桥的理念用在了索支结构中，并采用CFRP这种新材料作为悬带替代钢材。
发明内容：
本发明的目的是为了解决目前存在的建筑跨度受限制和抗倒塌能力不足的问题，提出了一种CFRP悬带交叉索支结构形式。
它包括一个圆型外环和CFRP悬带两两交错形成的索网结构体系。所述CFRP索网可根据需要设置成葵花型、方格型或不规则型，不设置内环。CFRP悬带锚固于圆外环上，CFRP悬带之间采用带重力刚度块的夹具夹持。CFRP悬带受自身重力和重力刚度块重力作用会下挠成为悬列线，以此来承受结构向下的荷载，比如自重和雪荷载；向上的风吸力由重力刚度块所产生的重力刚度来抵抗。该CFRP悬带交叉索支结构由于采用了CFRP作为悬带，相较于采用传统的钢悬带，可以节约材料用量，减轻结构自重，使结构更加轻盈、经 济；采用悬带两两交错形成的单层平面索网，在结构美学上具有创新性；不设置内环，无关键节点，结构内力在各CFRP悬带和节点处分布较为平均，结构抗连续倒塌能力强、鲁棒性好。
圆外环曲线公式如下。式中，r是圆的半径。其实就是xoy平面和圆柱形曲面的交线，xoy平面的原点就是圆外环曲线的中心点。
x 2+y 2＝r 2
CFRP悬带中心线的曲线方程，对于规则型中的葵花型，其实就是悬链线旋转曲面与相切于虚拟内环的竖直平面的交线段，且交线段的两个端点在圆外环曲线上。其公式如下：
Figure PCTCN2018123667-appb-000001
且其端点满足：
Figure PCTCN2018123667-appb-000002
式中，k,r的定义同上述不规则型的公式，
Figure PCTCN2018123667-appb-000003
是相切于虚拟内环的竖直平面的公式，r 0是虚拟内环在xoy平面内正投影曲线(为一个圆环)的半径，(x 0,y 0)是该正投影曲线(为一个圆环)上的点。
CFRP悬带中心线的曲线方程，对于规则型中的方格型，其实就是悬链线旋转曲面与相交于圆柱形曲面的与x轴平行(或重合)的竖直平面或与y轴 平行(或重合)的竖直平面的交线段，且交线段的两个端点在圆外环曲线上。其公式如下：
Figure PCTCN2018123667-appb-000004
且其端点满足：
Figure PCTCN2018123667-appb-000005
或者
Figure PCTCN2018123667-appb-000006
且其端点满足：
Figure PCTCN2018123667-appb-000007
式中，k,r的定义同上述不规则型的公式，w为任意实数，表示方格的宽度，i是任意自然数，只需满足|iw|＜r，r是圆柱形的半径，即圆外环曲线在xoy平面内正投影曲线(为一个圆环)的半径。
CFRP悬带中心线的曲线方程，对于不规则型，其实就是悬链线旋转曲面 与相交于圆柱形曲面的竖直平面的交线段，且交线段的两个端点在圆外环曲线上，公式如下：
Figure PCTCN2018123667-appb-000008
且其端点满足：
Figure PCTCN2018123667-appb-000009
式中，k是由带重力刚度块节点的密度以及CFRP悬带密度决定的实常数；a,b,c是悬带的几何参数，为任意实数(只需满足
Figure PCTCN2018123667-appb-000010
)，r是圆柱形的半径，即圆外环曲线在xoy平面内正投影曲线(为一个圆环)的半径。
施工过程：本结构边梁组装拼接完成，然后在地面把全部CFRP悬带组装完成，然后提升至预定高度，分批分步张CFRP悬带，最终锚固于圆形外环的边梁上。
从结构体系的受力性能分析来看，每根CFRP悬带可以在不借助其他CFRP悬带的情况下承担来自外界的荷载，因此不会因为其他某根CFRP悬带发生撕裂而退出工作，具有很好地抗连续性倒塌性能。
所述的结构体系内的构件全部采用受拉构件，充分利用CFRP悬带优良的抗拉性能，经济性显著。
本发明的一种CFRP悬带交叉索支结构，具有结构构件体系优越、抗连续倒塌能力强、鲁棒性好、结构轻盈、美观、经济性好等优点。
附图说明
图1是一种CFRP悬带交叉索支结构葵花型示意图
图2是一种CFRP悬带交叉索支结构葵花型三维图
图3是一种CFRP悬带交叉索支结构方格型示意图
图4是一种CFRP悬带交叉索支结构方格型三维图
图5是一种CFRP悬带交叉索支结构不规则型示意图
图6是一种CFRP悬带交叉索支结构不规则型三维图
图7是CFRP悬带示意图
其中1、圆形外环
2、CFRP悬带
3、带重力刚度块的节点
具体实施方式
一种CFRP悬带交叉索支结构，属于一种新型索网结构体系，主要适用于空间结构领域。包括一个圆型外环和CFRP悬带两两交错形成的索网结构体系。所述CFRP悬带索网可根据需要设置成葵花型、方格型或不规则型，不设置内环。CFRP悬带锚固于圆形外环上，CFRP悬带之间采用夹具夹持。由受压马鞍形边梁提供CFRP悬带中的拉力。一种CFRP悬带交叉索支结构，具有结构构件布置合理、抗连续倒塌能力强、鲁棒性好、结构轻盈、美观、经济性好等优点。
具体操作：本结构外环组装拼接完成，然后在地面把全部CFRP悬带组装完成，然后提升至预定高度，分批分步张CFRP悬带，最终锚固于圆形外环的边梁上。

Claims (6)

  1. 一种CFRP悬带交叉索支结构，其特征在于：包括一个平面圆形外环、CFRP悬带两两交错形成的索支结构体系和各节点处布置的重力刚度块；所述CFRP悬带索支体系设置成葵花型、方格型或不规则型，且没有内环；CFRP悬带采用波形锚锚固于圆形外环上，CFRP悬带之间采用布置重力刚度块的夹具夹持。
  2. 根据权利要求1所述的一种CFRP悬带交叉索支结构，其特征在于：
    平面圆形外环，方程为
    x 2+y 2＝r 2
    式中，r是圆形外环的半径。
  3. 根据权利要求1所述的一种CFRP悬带交叉索支结构，其特征在于：
    CFRP悬带采用CFRP单层悬带。
  4. 根据权利要求1所述的一种CFRP悬带交叉索支结构，其特征在于：
    CFRP悬带与CFRP悬带之间采用布置重力刚度块的夹具夹持，利用该重力刚度块产生的重力刚度来抵抗风吸力。
  5. 根据权利要求1所述的一种CFRP悬带交叉索支结构，其特征在于：
    葵花型，是悬链线旋转曲面与相切于虚拟内环的竖直平面的交线段，且交线段的两个端点在圆外环曲线上；
    方格型，是悬链线旋转曲面与相交于圆柱形曲面的与x轴平行或重合的竖直平面的交线段，或悬链线旋转曲面与相交于圆柱形曲面的与y轴平行或重合的竖直平面的交线段，且交线段的两个端点在圆外环曲线上；
    不规则型，是悬链线旋转曲面与相交于圆柱形曲面的竖直平面的交线段，且交线段的两个端点在圆外环曲线上。
  6. 安装如权利要求1-5任意一项所述一种CFRP悬带交叉索支结构的方法，其特征在于：本结构外环组装拼接完成，然后在地面把全部CFRP悬带索网组装完成，然后提升至预定高度，分批分步张CFRP悬带，最终锚固于外环的边梁上。
PCT/CN2018/123667 2018-12-18 2018-12-26 Cfrp悬带交叉索支结构 WO2019218679A1 (zh)

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