CN104847129B - Construction method of reinforcement device for reinforced concrete beam and floor slab - Google Patents
Construction method of reinforcement device for reinforced concrete beam and floor slab Download PDFInfo
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 57
- 230000002787 reinforcement Effects 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 238000005452 bending Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 4
- 238000005034 decoration Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 230000035882 stress Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
本发明提出一种钢筋混凝土梁与楼板的加固装置的施工方法,其加固装置包括由下向上紧箍钢筋混凝土梁的U形的钢箍部,和两个穿过楼板分别与钢箍部的两端固定连接在一起的螺栓部,此螺栓部的螺母拧紧于螺栓部处于楼板上方的部分。采用上述技术方案后,本发明的钢筋混凝土梁与楼板的加固装置,由于其通过钢箍部和螺栓部的配合连接将钢筋混凝土梁与楼板预紧锁固在一起,与现有技术相比,其可有效避免传统加固装置的应力滞后效应产生,保持锚固的有效性,可有效保证加固效果,提高钢筋混凝土梁的抗剪强度,结构简单易于实现,且外观紧凑美观,综合实用性强;本发明的施工方法,步骤简洁清晰,可有效提高实施所述加固装置的效率。
The invention proposes a construction method of a reinforcement device for reinforced concrete beams and floors. The reinforcement device includes a U-shaped steel hoop that tightens the reinforced concrete beam from bottom to top, and two steel hoops that pass through the floor and respectively connect with the steel hoop. The bolts are fixedly connected together, and the nuts of the bolts are tightened on the part of the bolts above the floor. After adopting the above-mentioned technical scheme, the reinforced concrete beam and the floor slab reinforcement device of the present invention pre-tighten and lock the reinforced concrete beam and the floor slab through the matching connection of the steel hoop part and the bolt part, compared with the prior art, It can effectively avoid the stress hysteresis effect of traditional reinforcement devices, maintain the effectiveness of anchorage, effectively ensure the reinforcement effect, and improve the shear strength of reinforced concrete beams. The structure is simple and easy to implement, and the appearance is compact and beautiful, and the comprehensive practicability is strong; The inventive construction method has concise and clear steps, and can effectively improve the efficiency of implementing the reinforcing device.
Description
本申请是“一种钢筋混凝土梁与楼板的新型加固装置及其施工方法”的分案申请,原申请的申请日为2013年5月27日,申请号为:201310200557.5。This application is a divisional application of "A Novel Reinforcement Device for Reinforced Concrete Beams and Floors and Its Construction Method". The original application date was May 27, 2013, and the application number is 201310200557.5.
技术领域technical field
本发明涉及建筑加固技术领域,具体涉及一种钢筋混凝土梁与楼板的加固装置及其施工方法。The invention relates to the technical field of building reinforcement, in particular to a reinforcement device for reinforced concrete beams and floor slabs and a construction method thereof.
背景技术Background technique
在工程结构中,往往由于建筑物老化、使用功能变更、结构设计或施工失误、设防标准提高等因素,需对既有建筑物进行加固。钢筋混凝土梁的抗剪加固是建筑物加固的一项重要内容。钢筋混凝土梁抗剪加固方法很多,常用的加固方法有增大截面法、粘贴纤维增强复合材料加固法、粘钢加固法和钢绞线聚合物砂浆加固法等。这些传统加固方法普遍存以下问题:(1)应力滞后效应问题,使得加固材料与原有构件共同工作能力较差,大大影响加固效果。(2)由于楼板的存在,往往造成加固材料锚固长度不够,容易发生锚固端的剥离破坏。(3)传统加固方法不能改变原结构的受力状况,构件内存在的裂缝等内部损伤和缺陷不能弥合或减小,如果不施加预应力,加固材料就无法对既有裂缝发挥作用,大大影响其加固效果,制约了其在损伤构件中加固的使用。In engineering structures, it is often necessary to reinforce existing buildings due to factors such as building aging, changes in use functions, structural design or construction errors, and increased fortification standards. The shear reinforcement of reinforced concrete beams is an important part of building reinforcement. There are many shear strengthening methods for reinforced concrete beams, and the commonly used strengthening methods include enlarging section method, pasting fiber reinforced composite material reinforcement method, bonding steel reinforcement method and steel strand polymer mortar reinforcement method, etc. These traditional reinforcement methods generally have the following problems: (1) The problem of stress hysteresis effect, which makes the ability of the reinforcement material to work with the original components poor, which greatly affects the reinforcement effect. (2) Due to the existence of the floor slab, the anchorage length of the reinforcement material is often insufficient, and the peeling damage of the anchorage end is prone to occur. (3) The traditional reinforcement method cannot change the stress state of the original structure, and the internal damage and defects such as cracks in the components cannot be bridged or reduced. If no prestress is applied, the reinforcement material will not be able to play a role in the existing cracks, which will greatly affect Its reinforcement effect restricts its use in reinforcement of damaged components.
鉴于此,本案发明人对上述问题进行深入研究,遂有本案产生。In view of this, the inventor of this case conducted in-depth research on the above-mentioned problem, and then this case was produced.
发明内容Contents of the invention
本发明的目的在于提供一种可有效避免传统加固装置的应力滞后效应产生,保持锚固的有效性的钢筋混凝土梁与楼板的加固装置,加固效果好,结构简单易于实现,且外观紧凑美观。The purpose of the present invention is to provide a reinforcement device for reinforced concrete beams and floors that can effectively avoid the stress hysteresis effect of traditional reinforcement devices and maintain the effectiveness of anchoring. The reinforcement effect is good, the structure is simple and easy to implement, and the appearance is compact and beautiful.
本发明的另一目的在于提供一种上述钢筋混凝土梁与楼板的加固装置的施工方法,步骤简洁清晰,实施效率高。Another object of the present invention is to provide a construction method of the reinforcement device for reinforced concrete beams and floors, which has simple and clear steps and high implementation efficiency.
为了达到上述目的,本发明采用这样的技术方案:In order to achieve the above object, the present invention adopts such technical scheme:
一种钢筋混凝土梁与楼板的加固装置,包括由下向上紧箍钢筋混凝土梁的U形的钢箍部,和两个穿过楼板分别与钢箍部的两端固定连接在一起的螺栓部,此螺栓部的螺母拧紧于螺栓部处于楼板上方的部分。A reinforcement device for a reinforced concrete beam and a floor slab, comprising a U-shaped steel hoop part that tightens the reinforced concrete beam from bottom to top, and two bolt parts that pass through the floor slab and are respectively fixedly connected to the two ends of the steel hoop part, The nut of this bolt part is screwed on the part above the floor of the bolt part.
上述螺栓部对应上述螺母设有处于螺母与楼板之间相对于螺母面积较大的垫片。Corresponding to the nut, the bolt portion is provided with a washer with a larger area between the nut and the floor plate than the nut.
上述钢箍部为宽度沿钢筋混凝土梁长度方向的钢板。The steel hoop part is a steel plate whose width is along the length direction of the reinforced concrete beam.
上述钢箍部与上述螺栓部具有连接部,此连接部在水平方向的各向尺寸均大于等于所述钢箍部和所述螺栓部的横截面的各向尺寸,所述连接部分别与所述钢箍部和所述螺栓部焊接在一起。The above steel hoop part and the above bolt part have a connection part, and the dimensions of the connection part in the horizontal direction are greater than or equal to the dimensions of the cross section of the steel hoop part and the bolt part, and the connection parts are respectively connected to the The steel hoop part and the bolt part are welded together.
上述钢箍部的弯折处为平滑弧形。The bending part of the steel hoop part is a smooth arc.
上述钢箍部在其弯折处对应钢筋混凝土梁设有匹配垫于二者之间相对于弯折处面积较大的钢垫板。Corresponding to the reinforced concrete beam at the bend of the above-mentioned steel hoop, a steel backing plate with a larger area relative to the bend is provided between the two.
上述钢箍部的竖向部分设有检测此处应力的应力检测装置。The vertical part of the steel hoop part is provided with a stress detection device for detecting the stress here.
上述应力检测装置为贴设于上述钢箍部上的电阻应变计。The above-mentioned stress detection device is a resistance strain gauge attached to the above-mentioned steel hoop.
一种钢筋混凝土梁与楼板的加固装置的施工方法:A construction method of a reinforcing device for a reinforced concrete beam and a floor slab:
(1)去除钢筋混凝土梁要加固处的粉刷层和楼板相应处的装修层;(1) Remove the stucco layer where the reinforced concrete beam is to be reinforced and the decoration layer where the floor slab is to be reinforced;
(2)确定楼板供螺栓部穿过的孔的位置、钢筋混凝土梁对应上述钢箍部弯折处的位置以及钢筋混凝土梁对应上述连接部的位置;(2) Determine the position of the hole in the floor slab for the bolt to pass through, the position of the reinforced concrete beam corresponding to the bend of the steel hoop, and the position of the reinforced concrete beam corresponding to the above connection;
(3)在楼板上确定的上述孔的位置进行钻孔,在上述钢筋混凝土梁上确定的对应上述钢箍部弯折处的位置进行与此弯折处相匹配的倒角处理,并在此倒角处衬垫上述钢垫板,在钢筋混凝土梁上确定的对应上述连接部的位置敲凿出与此连接部相应的凹坑;(3) Drill holes at the positions of the above-mentioned holes determined on the floor, and perform chamfering processing matched with the bends at the positions corresponding to the bends of the above-mentioned steel hoops determined on the above-mentioned reinforced concrete beams, and here The above-mentioned steel backing plate is lined at the chamfer, and the corresponding pit corresponding to the above-mentioned connection part is knocked out at the position corresponding to the above-mentioned connection part determined on the reinforced concrete beam;
(4)将焊接好的上述钢箍部和上述螺栓部对应上述孔由下向上箍住钢筋混凝土梁,在楼板上方将上述垫片套设在露出的所述螺栓部上,然后用螺母拧紧进行预应力施加安装。(4) Hoop the reinforced concrete beam from the bottom to the top with the welded steel hoop part and the above-mentioned bolt part corresponding to the above-mentioned hole, set the above-mentioned gasket on the exposed bolt part above the floor, and then tighten it with nuts. Prestressed installation.
采用上述技术方案后,本发明的钢筋混凝土梁与楼板的加固装置,由于其通过钢箍部和螺栓部的配合连接将钢筋混凝土梁与楼板预紧锁固在一起,与现有技术相比,其可有效避免传统加固装置的应力滞后效应产生,保持锚固的有效性,可有效保证加固效果,提高钢筋混凝土梁的抗剪强度,结构简单易于实现,且外观紧凑美观,综合实用性强;After adopting the above technical scheme, the reinforcement device for reinforced concrete beams and floors of the present invention, because it pre-tightens and locks the reinforced concrete beams and floors together through the matching connection of steel hoops and bolts, compared with the prior art, It can effectively avoid the stress hysteresis effect of traditional reinforcement devices, maintain the effectiveness of anchorage, effectively ensure the reinforcement effect, and improve the shear strength of reinforced concrete beams. The structure is simple and easy to implement, and the appearance is compact and beautiful, and the comprehensive practicability is strong;
本发明还提出一种上述加固装置的施工方法,步骤简洁清晰,可有效提高实施所述加固装置的效率。The present invention also proposes a construction method of the above-mentioned reinforcing device, the steps are simple and clear, and can effectively improve the efficiency of implementing the reinforcing device.
附图说明Description of drawings
图1为本发明的结构示意图;Fig. 1 is a structural representation of the present invention;
图2为本发明的使用状态示意图;Fig. 2 is a schematic diagram of the use state of the present invention;
图3为本发明另一角度的使用状态示意图。Fig. 3 is a schematic diagram of the use state of the present invention from another angle.
图中:In the picture:
1-钢箍部 11-弯折处1-steel hoop 11-bend
12-钢垫板12-steel backing plate
2-螺栓部 21-螺母2-bolt part 21-nut
22-垫片22-gasket
3-连接部3-Connection part
4-应力监测装置 5-钢筋混凝土梁4-Stress monitoring device 5-Reinforced concrete beam
6-楼板6- Floor
具体实施方式detailed description
为了进一步解释本发明的技术方案,下面通过具体实施例进行详细阐述。In order to further explain the technical solutions of the present invention, specific examples are given below to illustrate in detail.
本发明的一种钢筋混凝土梁与楼板的加固装置,如图1-3所示,包括钢箍部1和两个螺栓部2。A reinforcing device for reinforced concrete beams and floors of the present invention, as shown in FIGS. 1-3 , includes a steel hoop part 1 and two bolt parts 2 .
钢箍部1呈U形,由下向上紧箍钢筋混凝土梁5,两个螺栓部2穿过楼板6并分别与钢箍部1的两端固定连接在一起,螺栓部2的螺母21拧紧于螺栓部2露出于楼板6上方的部分,通过旋紧螺栓部2实现钢箍部1预应力的张拉,对钢筋混凝土梁5施加横向预应力,且将钢筋混凝土梁5与楼板6牢牢紧箍在一起,实现对钢筋混凝土梁5的抗剪加固。The steel hoop part 1 is U-shaped, tightening the reinforced concrete beam 5 from bottom to top, two bolt parts 2 pass through the floor 6 and are fixedly connected with both ends of the steel hoop part 1, and the nuts 21 of the bolt part 2 are tightened on the The bolt part 2 is exposed above the floor 6. By tightening the bolt part 2, the prestressed tension of the hoop part 1 is realized, and the transverse prestress is applied to the reinforced concrete beam 5, and the reinforced concrete beam 5 and the floor 6 are tightly fastened. Hoop together to realize the shear reinforcement of the reinforced concrete beam 5.
优选地,螺栓部2对应螺母21设有处于螺母21与楼板6之间并相对于螺母21面积较大的垫片22,垫片22可有效降低螺母21对楼板6的预紧力压强,增强楼板6及整个结构的承载强度。Preferably, the nut 21 of the bolt part 2 is provided with a gasket 22 between the nut 21 and the floor 6 and has a larger area relative to the nut 21. The gasket 22 can effectively reduce the pre-tightening force of the nut 21 on the floor 6, and enhance The bearing strength of the floor 6 and the whole structure.
优选地,钢箍部1为宽度沿钢筋混凝土梁5长度方向的钢板,此结构可增强钢箍部1对钢筋混凝土梁5的紧箍效果。Preferably, the steel hoop part 1 is a steel plate whose width is along the length direction of the reinforced concrete beam 5 , and this structure can enhance the tightening effect of the steel hoop part 1 on the reinforced concrete beam 5 .
优选地,钢箍部1与螺栓部2具有连接部3,此连接部3在水平方向的各向尺寸均大于等于钢箍部1和螺栓部2的横截面的各向尺寸,连接部3分别与钢箍部1和螺栓部2焊接在一起,即连接部3与钢箍部1和螺栓部2焊接的面积不小于钢箍部1和螺栓部2各自的横截面积,可有效利用钢箍部1和螺栓部2的横向尺寸,尽可能增大焊接面积,以提高连接的可靠性。Preferably, the steel hoop part 1 and the bolt part 2 have a connecting part 3, and the dimensions of the connecting part 3 in the horizontal direction are greater than or equal to the dimensions of the cross-sections of the steel hoop part 1 and the bolt part 2, and the connecting parts 3 are respectively It is welded together with the steel hoop part 1 and the bolt part 2, that is, the welding area of the connecting part 3 and the steel hoop part 1 and the bolt part 2 is not less than the respective cross-sectional areas of the steel hoop part 1 and the bolt part 2, which can effectively utilize the steel hoop The lateral dimensions of part 1 and bolt part 2 should increase the welding area as much as possible to improve the reliability of the connection.
优选地,钢箍部1的弯折处11为平滑弧形,以避免此弯折处11应力集中,提高其承载强度。Preferably, the bending portion 11 of the steel hoop portion 1 is in a smooth arc shape, so as to avoid stress concentration at the bending portion 11 and improve its bearing strength.
优选地,钢箍部1在其弯折处11对应钢筋混凝土梁5设有匹配垫于二者之间并相对于弯折处11面积较大的钢垫板12,钢垫板12可有效降低弯折处11对钢筋混凝土梁5的预紧力压强,增强钢筋混凝土梁5及整个结构的承载强度。Preferably, the steel hoop part 1 is provided with a matching steel backing plate 12 corresponding to the reinforced concrete beam 5 at its bending point 11 and having a larger area relative to the bending point 11. The steel backing plate 12 can effectively reduce the The pre-tightening pressure of the bent part 11 on the reinforced concrete beam 5 increases the bearing strength of the reinforced concrete beam 5 and the entire structure.
优选地,钢箍部1的竖向部分设有检测此处应力的应力检测装置4,可使人们对钢箍部1的预紧应力水平进行监测,便于更好地进行预紧操作的控制。Preferably, the vertical part of the steel hoop part 1 is provided with a stress detection device 4 for detecting the stress there, so that people can monitor the pre-tightening stress level of the steel hoop part 1, so as to better control the pre-tightening operation.
优选地,应力检测装置4为贴设于钢箍部1上的电阻应变计。Preferably, the stress detection device 4 is a resistance strain gauge attached to the hoop part 1 .
本发明还提出根据前述各实施例中的钢筋混凝土梁与楼板的加固装置的施工方法:The present invention also proposes the construction method of the reinforcement device for the reinforced concrete beam and the floor slab according to the foregoing embodiments:
(1)去除钢筋混凝土梁5要加固处的粉刷层和楼板6相应处的装修层;(1) remove the plastering layer at the reinforcing place of the reinforced concrete beam 5 and the decoration layer at the corresponding place of the floor slab 6;
(2)确定楼板6供螺栓部2穿过的孔的位置、钢筋混凝土梁5对应弯折处11的位置以及钢筋混凝土梁5对应连接部3的位置;(2) Determine the position of the hole through which the bolt portion 2 passes through the floor 6, the position of the corresponding bend 11 of the reinforced concrete beam 5, and the corresponding position of the connecting portion 3 of the reinforced concrete beam 5;
(3)在楼板6上确定的上述孔的位置进行钻孔,在钢筋混凝土梁5上确定的对应弯折处11的位置进行与此弯折处11相匹配的倒角处理,并在此倒角处衬垫钢垫板12,在钢筋混凝土梁5上确定的对应连接部3的位置敲凿出与此连接部3形状和尺寸等相应的凹坑;(3) Carry out drilling at the position of the above-mentioned hole determined on the floor 6, and carry out the chamfering processing matched with this bend 11 at the position of the corresponding bend 11 determined on the reinforced concrete beam 5, and chamfer at this Liner steel backing plate 12 at the corner, knock out corresponding pits corresponding to the shape and size of the connecting part 3 at the position of the corresponding connecting part 3 determined on the reinforced concrete beam 5;
(4)将焊接好的钢箍部1和螺栓部2对应上述孔由下向上箍住钢筋混凝土梁5,并在弯折处11与钢筋混凝土梁5的倒角处之间垫设钢垫板12,在楼板6上方将垫片22套设在露出的螺栓部2上,然后用螺母21拧紧进行预应力施加安装安装。(4) Hoop the reinforced concrete beam 5 from the bottom to the top with the welded steel hoop part 1 and the bolt part 2 corresponding to the above-mentioned holes, and set up a steel backing plate between the bend 11 and the chamfer of the reinforced concrete beam 5 12. Set the gasket 22 on the exposed bolt part 2 above the floor 6, and then tighten it with the nut 21 to perform prestressing installation and installation.
本发明的钢筋混凝土梁与楼板的加固装置及其施工方法,应力监测装置有选为电阻应变计,也可根据实际要求选取其它形式;刚垫片在保证面积大于钢箍部的弯折处且与钢筋混凝土梁的倒角相应的情况下,其具体形状和尺寸等可根据实际要求进行调整和设计;钢箍部的弯折处的具体形状可根据实际要求进行调整和设计;连接部的具体尺寸和形状等可根据实际要求进行调整和设计;钢箍部优选为钢板,也可根据实际要求进行选取;垫片在保证面积大于螺母面积的情况下,其具体形状和尺寸等可根据实际要求进行调整和设计。The reinforcing device of reinforced concrete beam and floor slab and construction method thereof of the present invention, stress monitoring device has to be selected as resistance strain gauge, also can select other forms according to actual requirement; In the case of corresponding to the chamfer of the reinforced concrete beam, its specific shape and size can be adjusted and designed according to actual requirements; the specific shape of the bending part of the steel hoop can be adjusted and designed according to actual requirements; the specific shape of the connection part The size and shape can be adjusted and designed according to actual requirements; steel hoops are preferably steel plates, which can also be selected according to actual requirements; when the area of the gasket is guaranteed to be larger than the nut area, its specific shape and size can be determined according to actual requirements Make adjustments and design.
本发明的产品形式并非限于本案图示和实施例,任何人对其进行类似思路的适当变化或修饰,皆应视为不脱离本发明的专利范畴。The product form of the present invention is not limited to the illustrations and examples of this case, and anyone who makes appropriate changes or modifications of similar ideas to it shall be deemed not to depart from the scope of the patent of the present invention.
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CN105672688B (en) * | 2016-02-16 | 2017-12-08 | 福州大学 | The prestressing force intensifier and its construction method of a kind of continued access timber structure |
CN105937307A (en) * | 2016-06-07 | 2016-09-14 | 江西赣粤高速公路股份有限公司 | Prestress-steel-wire-rope-bending-shearing-reinforced concrete T beam and reinforcing method thereof |
CN106320189A (en) * | 2016-08-30 | 2017-01-11 | 中铁四局集团第四工程有限公司 | Transverse reinforcing construction method of existing railway line T beam |
CN107816218B (en) * | 2017-10-28 | 2019-11-12 | 温州威泰建设有限公司 | A kind of bracing means and its construction method of beams of concrete and plate |
CN108343259A (en) * | 2018-02-06 | 2018-07-31 | 广东省基础工程集团有限公司 | A kind of prestressed reinforcement beam and its construction method |
CN108894123A (en) * | 2018-09-04 | 2018-11-27 | 南京林业大学 | A kind of quick Shear Strengthening box-beam structure of Prestressed U type muscle and method |
CN109653533A (en) * | 2019-02-13 | 2019-04-19 | 程勇俊 | A kind of concrete floor reinforced construction method |
CN110593600B (en) * | 2019-10-15 | 2023-12-22 | 广东省建筑工程集团有限公司 | Beam slab reinforcement construction method of existing building |
CN111305468B (en) * | 2020-03-05 | 2021-08-31 | 深圳市第一建筑工程有限公司 | Superstrong reinforced concrete roof beam |
CN114753669B (en) * | 2022-04-27 | 2023-04-21 | 华中科技大学 | Combined FRP shearing-resistant reinforcing device and application thereof |
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JP2001032530A (en) * | 1999-07-16 | 2001-02-06 | Mitsui Constr Co Ltd | Reinforcing device and method for concrete columnar structure |
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