CN105569368A - Annular steel plate strengthening device for reinforced concrete column with circular cross section - Google Patents
Annular steel plate strengthening device for reinforced concrete column with circular cross section Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 79
- 239000010959 steel Substances 0.000 title claims abstract description 79
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 49
- 238000005728 strengthening Methods 0.000 title 1
- 230000002787 reinforcement Effects 0.000 abstract description 37
- 238000010276 construction Methods 0.000 abstract description 11
- 239000004567 concrete Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 17
- 238000012946 outsourcing Methods 0.000 description 8
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000264877 Hippospongia communis Species 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0225—Increasing or restoring the load-bearing capacity of building construction elements of circular building elements, e.g. by circular bracing
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Abstract
本发明公开了一种用于钢筋混凝土圆形截面柱的环形钢板加固装置。该装置包括两个半圆形钢板，在半圆形钢板的两个侧边外侧焊接连接件，连接件是一个钢质长方体构件，在连接件上开有螺栓孔，将两个半圆形钢板对称扣在待加固钢筋混凝土柱外侧，用螺栓穿过螺栓孔，将两个半圆形钢板的连接件连接，通过螺帽紧固螺栓，形成一种用于钢筋混凝土圆形截面柱的环形钢板加固装置。本发明装置能通过锚栓紧固对环形钢板施加一个环向拉应力，由此使得环向钢板对圆形钢筋混凝土柱施加一个径向压应力，使混凝土处于三向受力状态，能有效提高混凝土的极限抗压强度和被加固构件的抗压承载能力；本发明装置的构件均在工厂加工，施工现场工作量少且施工方便。
The invention discloses an annular steel plate reinforcement device for reinforced concrete circular section columns. The device consists of two semicircular steel plates, and the connecting piece is welded on the outside of the two sides of the semicircular steel plate. The connecting piece is a steel cuboid member with bolt holes on the connecting piece. Buckle symmetrically on the outside of the reinforced concrete column to be reinforced, use bolts to pass through the bolt holes, connect the connectors of the two semicircular steel plates, and fasten the bolts through nuts to form a circular steel plate for reinforced concrete circular cross-section columns Reinforcement device. The device of the present invention can apply a circumferential tensile stress to the annular steel plate through the fastening of anchor bolts, thereby enabling the circumferential steel plate to apply a radial compressive stress to the circular reinforced concrete column, so that the concrete is in a three-dimensional stress state, which can effectively improve The ultimate compressive strength of the concrete and the compressive bearing capacity of the reinforced components; the components of the device of the present invention are all processed in the factory, and the workload on the construction site is small and the construction is convenient.
Description
技术领域 technical field
本发明属于结构工程加固技术领域，特别涉及一种用于钢筋混凝土圆形截面柱的环形钢板加固装置，该环形钢板加固装置尤其适用于桥梁工程中钢筋混凝土圆形墩柱的加固。 The invention belongs to the technical field of structural engineering reinforcement, and particularly relates to an annular steel plate reinforcement device for reinforced concrete circular cross-section columns. The annular steel plate reinforcement device is especially suitable for reinforcement of reinforced concrete circular pier columns in bridge engineering.
背景技术 Background technique
工程中常用的钢筋混凝土圆形柱的加固方法有增大截面法、粘贴碳纤维布法和外粘钢板法。其中，增大截面法，可有效提高构件的承载能力，但须现场进行混凝土的浇筑、振捣和养护工作，施工不方便，增大钢筋混凝土的尺寸，减小有效使用面积或桥下过水面积；粘贴碳纤维布法，可提高钢筋混凝土的承载能力，但提高幅度较小，最大在10%左右，且耐久性不足，当粘结碳纤维丝的胶水老化后，碳纤维布容易破碎、脱落；外包钢加固法，需要在现场灌浆或粘胶水，施工工艺复杂。在建筑工程和桥梁工程中，构件本身自重占设计荷载的比重一般都在60%以上，个别甚至达到90%以上，增大截面法、粘贴碳纤维布法和外粘钢板法等加固方法所施加的材料只对加固后结构所承担的活载、地震作用等起作用，而对已经施加在构件上的、占设计荷载比重最高的自重并不起作用。 The reinforcement methods of reinforced concrete circular columns commonly used in engineering include enlarging section method, pasting carbon fiber cloth method and external bonding steel plate method. Among them, the method of increasing the section can effectively improve the bearing capacity of the components, but the concrete pouring, vibration and maintenance work must be carried out on site, which is inconvenient for construction, increasing the size of reinforced concrete, reducing the effective use area or passing water under the bridge area; sticking carbon fiber cloth method can improve the bearing capacity of reinforced concrete, but the increase is small, the maximum is about 10%, and the durability is insufficient. When the glue bonding carbon fiber filaments ages, the carbon fiber cloth is easy to break and fall off; Baotou steel reinforcement method requires on-site grouting or viscose water, and the construction process is complicated. In construction engineering and bridge engineering, the proportion of the self-weight of the component itself to the design load is generally more than 60%, and some even reach more than 90%. The material only acts on the live load and earthquake action borne by the reinforced structure, but does not act on the self-weight that has been applied to the component and accounts for the highest proportion of the design load.
本发明针对于此，提出一种用于钢筋混凝土圆形截面柱的环形钢板加固装置，施工过程中，对圆形钢筋混凝土柱施加一个径向压应力，确保加固装置与被加固构件形成整体共同受力，能使被加固构件的混凝土处于三向受压状态，在有效提高被加固构件的承载能力同时，能有效提高被加固构件混凝土的抗压强度和构件的承载能力，加固装置不但在后续荷载作用下起作用，对构件已经承受结构的自重也起作用，构造简单，施工方便。 Aiming at this, the present invention proposes an annular steel plate reinforcement device for reinforced concrete circular section columns. During the construction process, a radial compressive stress is applied to the circular reinforced concrete columns to ensure that the reinforcement device and the members to be reinforced form an integral joint. Stress can make the concrete of the reinforced member be in a three-way compression state. While effectively improving the bearing capacity of the reinforced member, it can effectively improve the compressive strength of the reinforced concrete and the bearing capacity of the member. The reinforcement device is not only in the follow-up It works under the action of load, and it also works on the self-weight of the structure that the component has already borne. The structure is simple and the construction is convenient.
中国发明专利公开号为CN104060848A的《钢筋混凝土圆柱加固装置及加固方法》，公开的方法是钢筋混凝土圆柱外面从下到上设有第一段外包钢板、第二段外包钢板和第三段外包钢板，所述第一段外包钢板两端设有四个灌浆孔，所述第二段外包钢板上端设有两个灌浆孔，所述第一段外包钢板、第二段外包钢板和第三段外包钢板焊接形成一个套箍于钢筋混凝土圆柱外的钢管，所述钢管和钢筋混凝土圆柱之间设有灌浆料。该方法公开的加固装置只在后续荷载作用下起作用，对构件已经承受结构的自重不起作用，现场需要焊接和灌浆，工艺复杂。 Chinese Invention Patent Publication No. CN104060848A "Reinforced Concrete Cylinder Reinforcement Device and Reinforcement Method", the disclosed method is that the outside of the reinforced concrete cylinder is provided with a first section of outsourcing steel plate, a second section of outsourcing steel plate and a third section of outsourcing steel plate from bottom to top , the two ends of the first section of outsourcing steel plate are provided with four grouting holes, the upper end of the second section of outsourcing steel plate is provided with two grouting holes, the first section of outsourcing steel plate, the second section of outsourcing steel plate and the third section of outsourcing steel plate The steel plate is welded to form a steel pipe hooped outside the reinforced concrete cylinder, and grouting material is arranged between the steel pipe and the reinforced concrete cylinder. The reinforcing device disclosed in this method only works under subsequent loads, and does not work on the self-weight of the structure already borne by the member. Welding and grouting are required on site, and the process is complicated.
中国发明专利公开号为CN103669635A的《预应力角钢板加固装置》，公开的装置是一种预应力角钢板加固装置，属于建筑结构抗震加固领域。它主要包括四块角钢板、连接件和高强预应力螺栓，每块角钢板的两端固定着连接件，高强预应力螺栓通过连接件将相邻的两块角钢板连接在一起形成一个与被加固构件截面相适配的闭环加固装置。该装置适于用矩形截面柱。 Chinese Invention Patent Publication No. CN103669635A "Prestressed Angle Steel Reinforcement Device", the disclosed device is a prestressed angle steel reinforcement device, which belongs to the field of seismic reinforcement of building structures. It mainly includes four angle steel plates, connecting pieces and high-strength prestressed bolts. The two ends of each angle steel plate are fixed with connecting pieces. The high-strength prestressed bolts connect two adjacent angle steel plates through the connecting pieces to form a A closed-loop reinforcement device that matches the section of the reinforcement member. The device is suitable for use with columns of rectangular cross-section.
发明内容 Contents of the invention
本发明的目的是针对现有钢筋混凝土柱加固方法存在的问题，提供一种用于钢筋混凝土圆形截面柱的环形钢板加固装置。 The object of the present invention is to provide an annular steel plate reinforcement device for reinforced concrete columns with circular cross-sections, aiming at the problems existing in the existing reinforcement methods for reinforced concrete columns.
本发明的技术方案： Technical scheme of the present invention:
一种用于钢筋混凝土圆形截面柱的环形钢板加固装置，包括两个半圆形钢板，在半圆形钢板的两个侧边外侧焊接连接件，连接件是一个钢质长方体构件，在连接件上开有螺栓孔，将两个半圆形钢板对称扣在待加固钢筋混凝土柱外侧，用螺栓穿过螺栓孔，将两个半圆形钢板的连接件连接，通过螺帽紧固螺栓，形成用于钢筋混凝土圆形截面柱的环形钢板加固装置。 A ring-shaped steel plate reinforcement device for reinforced concrete circular cross-section columns, including two semi-circular steel plates, and connecting pieces are welded on the outside of the two sides of the semi-circular steel plates. The connecting piece is a steel cuboid member. Bolt holes are opened on the parts, and the two semicircular steel plates are buckled symmetrically on the outside of the reinforced concrete column to be reinforced, and the bolts are passed through the bolt holes to connect the connecting parts of the two semicircular steel plates, and the bolts are fastened through nuts. Forming ring-shaped steel plate reinforcements for reinforced concrete columns of circular section.
所述半圆形钢板内侧半径等于待加固钢筋混凝土柱的半径，每个半圆形钢板的圆弧角采用178~179°。 The inner radius of the semicircular steel plate is equal to the radius of the reinforced concrete column to be reinforced, and the arc angle of each semicircular steel plate is 178-179°.
一个所述连接件对应的所述螺栓的数量≥2个。 The number of the bolts corresponding to one connecting piece is more than or equal to 2.
本发明的优点： Advantages of the present invention:
(1)本发明装置能通过锚栓紧固对环形钢板施加一个环向拉应力，由此使得环向钢板对圆形钢筋混凝土柱施加一个径向压应力，使混凝土处于三向受力状态，能有效提高混凝土的极限抗压强度和被加固构件的抗压承载能力。 (1) The device of the present invention can apply a circumferential tensile stress to the annular steel plate through the fastening of anchor bolts, thereby causing the circumferential steel plate to apply a radial compressive stress to the circular reinforced concrete column, so that the concrete is in a three-way stressed state, It can effectively improve the ultimate compressive strength of concrete and the compressive bearing capacity of reinforced components.
(2)本发明装置的构件均在工厂加工，施工现场工作量少且施工方便。 (2) The components of the device of the present invention are all processed in the factory, so the workload on the construction site is small and the construction is convenient.
附图说明 Description of drawings
图1为本发明的用于钢筋混凝土圆形截面柱的环形钢板加固装置的平面图。 Fig. 1 is a plan view of the circular steel plate reinforcement device for reinforced concrete columns with circular cross section according to the present invention.
图2为本发明的用于钢筋混凝土圆形截面柱的环形钢板加固装置的立面图。 Fig. 2 is an elevation view of the circular steel plate reinforcement device for reinforced concrete columns with circular cross-sections according to the present invention.
图3为本发明的用于钢筋混凝土圆形截面柱的环形钢板加固装置的连接件的轴测图。 Fig. 3 is an axonometric view of the connecting piece of the circular steel plate reinforcement device for reinforced concrete columns with a circular section according to the present invention.
图4为本发明实施例中用于钢筋混凝土圆形截面柱的环形钢板加固装置的其中一块半圆形钢板的平面图。 Fig. 4 is a plan view of one of the semicircular steel plates of the circular steel plate reinforcement device for reinforced concrete circular cross-section columns in the embodiment of the present invention.
图中标记：1-半圆形钢板；2-连接件；3-螺栓；4-螺帽；5-待加固钢筋混凝土柱；6-螺栓孔。 Marks in the figure: 1-semicircular steel plate; 2-connector; 3-bolt; 4-nut; 5-reinforced concrete column to be reinforced; 6-bolt hole.
具体实施方式 detailed description
实施例：Example:
本实施例以半径为0.6m的待加固钢筋混凝土柱为加固对象，下面结合附图作进一步详细描述： In this embodiment, the reinforced concrete column to be reinforced with a radius of 0.6m is used as the reinforcement object, and is further described in detail below in conjunction with the accompanying drawings:
如图1-4所示，一种用于钢筋混凝土圆形截面柱的环形钢板加固装置，包括：两个半圆形钢板1，在半圆形钢板1的两个侧边外侧焊接连接件2，连接件2是一个钢质长方体构件，在连接件2上开有螺栓孔6，将两个半圆形钢板1对称扣在待加固钢筋混凝土柱5外侧，用螺栓3穿过螺栓孔6，将两个半圆形钢板1的连接件2连接，通过螺帽4紧固螺栓3，形成一种用于钢筋混凝土圆形截面柱的环形钢板加固装置。 As shown in Figure 1-4, a circular steel plate reinforcement device for reinforced concrete columns with circular cross-sections, including: two semicircular steel plates 1, and connecting pieces 2 welded on the outside of the two sides of the semicircular steel plates 1 , the connector 2 is a steel rectangular parallelepiped member, and a bolt hole 6 is opened on the connector 2, two semicircular steel plates 1 are buckled symmetrically on the outside of the reinforced concrete column 5 to be reinforced, and the bolt 3 is passed through the bolt hole 6, The connecting piece 2 of two semicircular steel plates 1 is connected, and the bolt 3 is fastened by the nut 4 to form a circular steel plate reinforcement device for reinforced concrete circular section columns.
所述半圆形钢板1内侧半径等于待加固钢筋混凝土柱5的半径，即为0.6m，半圆形钢板1的高度取0.3m，每个半圆形钢板1的圆弧角采用178°。 The inner radius of the semicircular steel plate 1 is equal to the radius of the reinforced concrete column 5 to be reinforced, which is 0.6m, the height of the semicircular steel plate 1 is 0.3m, and the arc angle of each semicircular steel plate 1 is 178°.
一个所述连接件2对应的所述螺栓3的数量为2个。 The number of the bolts 3 corresponding to one connecting piece 2 is two.
利用上述环形钢板加固装置对半径为0.6m的待加固钢筋混凝土柱5进行加固，具体步骤为： The reinforced concrete column 5 to be reinforced with a radius of 0.6 m is reinforced by using the above-mentioned annular steel plate reinforcement device, and the specific steps are as follows:
(1)在工厂加工半圆形钢板1和连接件2，将半圆形钢板1和连接件2焊接成整体，在连接件2上安装螺栓3的位置钻螺栓孔6。 (1) Process the semicircular steel plate 1 and the connecting piece 2 in the factory, weld the semicircular steel plate 1 and the connecting piece 2 into a whole, and drill the bolt hole 6 at the position where the bolt 3 is installed on the connecting piece 2.
(2)在工地现场，用砂轮打磨待加固钢筋混凝土柱5表面的杂物，并用压缩空气吹掉待加固钢筋混凝土柱5表面浮尘，用水泥砂浆修补待加固钢筋混凝土柱5表面的蜂窝、空洞和缺损。 (2) At the construction site, use a grinding wheel to polish the sundries on the surface of the reinforced concrete column 5 to be reinforced, blow off the floating dust on the surface of the reinforced concrete column 5 to be reinforced with compressed air, and repair the honeycombs and cavities on the surface of the reinforced concrete column 5 to be reinforced with cement mortar and defects.
(3)自待加固钢筋混凝土柱5的下部开始，将两块半圆形钢板1扣在待加固钢筋混凝土柱5的外侧，就位后，插上螺栓3，拧上螺帽4，初步紧固螺栓3，将环形钢板加固装置固定在待加固钢筋混凝土柱5上。 (3) Starting from the lower part of the reinforced concrete column 5 to be reinforced, buckle two semicircular steel plates 1 on the outer side of the reinforced concrete column 5 to be reinforced. After they are in place, insert the bolts 3 and screw on the nuts 4 for preliminary tightening. Fix the bolt 3, and fix the ring-shaped steel plate reinforcement device on the reinforced concrete column 5 to be reinforced.
(4)确定相邻两个环形钢板加固装置的净距取0.2cm，依次向上再安装其他环形钢板加固装置，上下相邻的环形钢板加固装置的连接件2、螺栓3在竖直方向上不能处于同一条直线，错开90°。 (4) Determine the clear distance between two adjacent ring-shaped steel plate reinforcement devices to take 0.2cm, and then install other ring-shaped steel plate reinforcement devices in turn. In the same straight line, staggered by 90°.
(5)当待加固钢筋混凝土柱5上的全部环形钢板加固装置固定就位后，从上往下依次紧固环形钢板加固装置的螺栓3至设计拉力，半圆形钢板1同时对待加固钢筋混凝土柱5施加径向压应力。 (5) After all the annular steel plate reinforcement devices on the reinforced concrete column 5 to be reinforced are fixed in place, the bolts 3 of the annular steel plate reinforcement devices are tightened sequentially from top to bottom to the design tension, and the semicircular steel plates 1 are simultaneously treated to reinforce the reinforced concrete Column 5 exerts radial compressive stress.
(6)环形钢板加固装置全部紧固完毕后，做好装置表面的防腐处理，即完成加固施工。 (6) After all the ring-shaped steel plate reinforcement devices are fastened, the anti-corrosion treatment of the surface of the device is done, and the reinforcement construction is completed.
本申请中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。 The specific embodiments described in this application are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.
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| CN201510942948.3A CN105569368A (en) | 2015-12-16 | 2015-12-16 | Annular steel plate strengthening device for reinforced concrete column with circular cross section |
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| CN201510942948.3A CN105569368A (en) | 2015-12-16 | 2015-12-16 | Annular steel plate strengthening device for reinforced concrete column with circular cross section |
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| CN201510942948.3A Pending CN105569368A (en) | 2015-12-16 | 2015-12-16 | Annular steel plate strengthening device for reinforced concrete column with circular cross section |
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| CN108360837A (en) * | 2018-03-14 | 2018-08-03 | 成都理工大学 | A kind of bracing means, concrete strengthening structure and confined concrete reinforcement means |
| CN112983044A (en) * | 2021-04-22 | 2021-06-18 | 江西汉唐特种工程技术有限公司 | Rectangular concrete member outsourcing shaped steel is consolidated and is used fastener |
| US20220178158A1 (en) * | 2020-12-07 | 2022-06-09 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed frp sheet and high strength steel wire rope |
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| CN108360837A (en) * | 2018-03-14 | 2018-08-03 | 成都理工大学 | A kind of bracing means, concrete strengthening structure and confined concrete reinforcement means |
| US20220178158A1 (en) * | 2020-12-07 | 2022-06-09 | Fuzhou University | Device and method for reinforcing round section wood beam by combination of prestressed frp sheet and high strength steel wire rope |
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| CN112983044A (en) * | 2021-04-22 | 2021-06-18 | 江西汉唐特种工程技术有限公司 | Rectangular concrete member outsourcing shaped steel is consolidated and is used fastener |
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