CN206468033U - A kind of steel plate reinforcement structure - Google Patents
A kind of steel plate reinforcement structure Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 230000002787 reinforcement Effects 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 4
- 238000003908 quality control method Methods 0.000 abstract 1
- 230000000750 progressive effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
本实用新型公开了一种钢板加固结构，包括框架梁、框架柱、条形钢板、L型钢板、U型件、锚栓、螺栓、钢压板和粘接材料，条形钢板包括紧贴在框架梁上表面的粘贴区和位于粘贴区两端的附加区，L型钢板包括紧贴在条形钢板附加区上的水平端和紧贴在框架柱表面的竖直端，竖直端外设有U型件，U型件的内表面分别紧贴在L型钢板的竖直端框架柱表面。本实用新型在于提高既有钢筋混凝土结构悬链线效应，通过在框架梁和框架柱上设置钢板加固结构来提高既有钢筋混凝土结构的悬链线效应，进而提高结构的抗竖向连续性倒塌性能。本实用新型不仅取材简单，施工方便，而且质量易于控制，另外钢板适用于各种恶劣环境，对高温和强腐蚀性等环境具有很好的实用性。
The utility model discloses a steel plate reinforcement structure, which comprises frame beams, frame columns, strip-shaped steel plates, L-shaped steel plates, U-shaped pieces, anchor bolts, bolts, steel pressure plates and bonding materials. The sticking area on the upper surface of the beam and the additional area located at both ends of the sticking area, the L-shaped steel plate includes a horizontal end that is close to the additional area of the strip steel plate and a vertical end that is close to the surface of the frame column, and there is a U on the outside of the vertical end The inner surfaces of the U-shaped parts and the U-shaped parts are respectively attached to the surface of the vertical end frame column of the L-shaped steel plate. The utility model aims at improving the catenary effect of the existing reinforced concrete structure, and improving the catenary effect of the existing reinforced concrete structure by arranging steel plate reinforcement structures on the frame beams and frame columns, thereby improving the vertical continuous collapse resistance of the structure performance. The utility model is not only simple in material acquisition, convenient in construction, but also easy in quality control. In addition, the steel plate is suitable for various harsh environments, and has good practicability for high temperature and strong corrosive environments.
Description
技术领域technical field
本实用新型涉及建筑领域，尤其涉及一种提高既有钢筋混凝土结构悬链线效应的钢板加固结构。The utility model relates to the construction field, in particular to a steel plate reinforcement structure for improving the catenary effect of the existing reinforced concrete structure.
背景技术Background technique
结构连续性倒塌是指结构由于突发事件的发生造成结构发生初始局部破坏，继而引起与破坏构件相连的构件连续破坏，最终导致结构的整体倒塌或者大范围的倒塌。Structural progressive collapse refers to the initial local damage of the structure due to the occurrence of emergencies, which then causes the continuous damage of the components connected to the damaged components, and finally leads to the overall collapse or large-scale collapse of the structure.
国内现阶段对结构抗连续性倒塌的研究尚未成熟。我国所有现行设计规范仅有《混凝土结构设计规范》GB 50010-2010的3.6节和《高层建筑混凝土结构技术规程》JGJ 3-2010第3.12.1条中给出结构的防连续性倒塌设计原则，并没有具体的、具有可操作性的设计方法和流程，更没有提高既有结构抗倒塌能力的方法，结构连续倒塌依然是土木工程界无法避免的重大问题。At present, domestic research on progressive collapse resistance of structures is not yet mature. All the current design codes in my country only provide the progressive collapse prevention design principles in Section 3.6 of "Code for Design of Concrete Structures" GB 50010-2010 and Article 3.12.1 of "Technical Regulations for Concrete Structures of High-Rise Buildings" JGJ 3-2010. There is no specific and operable design method and process, and there is no method to improve the collapse resistance of existing structures. The continuous collapse of structures is still a major problem that cannot be avoided in the civil engineering field.
在偶然荷载(强震、爆炸、飓风等)作用下，框架结构竖向受力构件失效后，约束梁会依次进入弹性阶段、弹塑性阶段，进而屈服产生塑性铰，成为瞬变机构，此时梁构件的计算跨度和变形突然增大，形成悬链线效应。结构的悬链线效应能够大幅度减缓因偶然荷载导致柱失效后可能触发的连续倒塌，并成为抗连续性倒塌的最后一道防线。而既有的结构大多数的梁上部纵向钢筋被截断，对结构形成悬链线效应起到严重的削弱，不利于抗竖向连续性倒塌。所以，如何提高既有结构的悬链线效应，使结构竖向受力构件失效后能防止整体的连续性倒塌，是工程设计中抗连续性倒塌的重要环节。Under the action of accidental loads (strong earthquakes, explosions, hurricanes, etc.), after the vertical stress members of the frame structure fail, the restraint beams will enter the elastic stage and elastic-plastic stage in turn, and then yield to produce plastic hinges, becoming a transient mechanism. The calculated span and deformation of the beam members increase suddenly, forming a catenary effect. The catenary effect of the structure can greatly slow down the progressive collapse that may be triggered after the failure of the column due to accidental load, and become the last line of defense against progressive collapse. However, in the existing structures, most of the longitudinal steel bars on the upper part of the beams are cut off, which seriously weakens the catenary effect of the structure, which is not conducive to the resistance to vertical continuous collapse. Therefore, how to improve the catenary effect of the existing structure and prevent the overall progressive collapse after the failure of the vertical stress members of the structure is an important part of the progressive collapse resistance in engineering design.
实用新型内容Utility model content
本实用新型的目的是提供一种能够提高既有结构悬链线效应的钢板加固结构，通过在框架梁和框架柱上设置钢板加固结构来提高既有钢筋混凝土结构的悬链线效应，进而提高结构的抗竖向连续性倒塌性能。The purpose of this utility model is to provide a steel plate reinforcement structure that can improve the catenary effect of the existing structure, by setting the steel plate reinforcement structure on the frame beam and frame column to improve the catenary effect of the existing reinforced concrete structure, and then improve The vertical continuous collapse resistance of the structure.
为实现目的，本实用新型的技术方案是：一种钢板加固结构，包括框架梁、框架柱，所述框架梁为梁体存在上部钢筋截断设计的既有钢筋混凝土梁，框架梁上部纵向受力钢筋的钢筋走向相同且位于多条平行直线上，所述钢筋走向上的受力钢筋之间的无钢筋区域为框架梁的钢筋截断区，还包括In order to achieve the purpose, the technical solution of the utility model is: a steel plate reinforced structure, including frame beams and frame columns, the frame beams are existing reinforced concrete beams designed for the truncation of upper steel bars in the beam body, and the upper part of the frame beams is longitudinally stressed The steel bars have the same trend and are located on multiple parallel straight lines, and the unreinforced area between the stressed steel bars on the steel bar is the bar truncated area of the frame beam, which also includes
条形钢板，包括粘贴区和位于粘贴区两端的附加区，所述条形钢板紧贴在框架梁上表面，且粘贴区覆盖钢筋截断区，附加区设有间隔设置的螺栓孔；条形钢板紧贴框架梁一侧设有粘接材料；The strip-shaped steel plate includes a paste area and an additional area located at both ends of the paste area. The strip-shaped steel plate is close to the upper surface of the frame beam, and the paste area covers the cut-off area of the steel bar. The additional area is provided with bolt holes arranged at intervals; the strip-shaped steel plate Adhesive material is provided on one side close to the frame beam;
L型钢板，所述L型钢板包括紧贴在条形钢板附加区的水平端和紧贴在框架柱表面的竖直端，水平端设有间隔设置的螺栓孔，竖直端沿远离水平端方向依次设有U型件和螺栓孔；L型钢板的螺栓孔外设有紧贴在水平端、竖直端的钢压板，所述钢压板设有螺栓孔，螺栓孔内设有螺栓；L型钢板紧贴框架梁或框架柱或条形钢板一侧设有粘接材料；L-shaped steel plate, the L-shaped steel plate includes a horizontal end close to the additional area of the strip steel plate and a vertical end close to the surface of the frame column, the horizontal end is provided with bolt holes arranged at intervals, and the vertical end is far away from the horizontal end The direction is provided with U-shaped parts and bolt holes in turn; outside the bolt holes of the L-shaped steel plate, there are steel pressure plates close to the horizontal end and vertical end, and the steel pressure plate is provided with bolt holes, and bolts are arranged in the bolt holes; L-shaped steel plate Adhesive materials are provided on the side of the steel plate close to the frame beam or frame column or strip steel plate;
所述U型件的内表面分别紧贴在L型钢板的竖直端和竖直端两侧的框架柱表面，U型件设有压力孔，压力孔内设有锚栓，用于将U型件和框架柱固定连接；U型件内表面设有粘接材料。The inner surface of the U-shaped piece is respectively attached to the vertical end of the L-shaped steel plate and the surface of the frame column on both sides of the vertical end. The U-shaped piece is provided with a pressure hole, and an anchor bolt is arranged in the pressure hole for connecting the U-shaped The shaped piece and the frame column are fixedly connected; the inner surface of the U-shaped piece is provided with bonding material.
作为本方案的一种优选方案，所述螺栓采用M12螺栓。As a preferred solution of this solution, the bolts are M12 bolts.
作为本方案的一种优选方案，所述锚栓采用M16锚栓。As a preferred solution of this solution, the anchor bolts are M16 anchor bolts.
本实用新型的有益效果是：The beneficial effects of the utility model are:
1、本实用新型通过在框架梁和框架柱上粘贴钢板，可以较好地解决既有框架结构大变形截断悬链线效应不足的问题，增强既有结构的抗竖向连续性倒塌能力。另外，本实用新型除采用粘接材料粘接钢板外，还通过锚固件固定，在框架结构变形过程中，结构构件的面内切力受力初期通过胶体传递，受力后期通过螺栓传递，两种加固手段分别针对不同时期结构变形。1. By pasting steel plates on the frame beams and frame columns, the utility model can better solve the problem of insufficient catenary effect due to large deformation of the existing frame structure, and enhance the vertical continuous collapse resistance of the existing structure. In addition, in addition to using adhesive materials to bond steel plates, the utility model is also fixed by anchors. During the deformation process of the frame structure, the in-plane shear force of the structural members is transmitted through the colloid at the initial stage of stress, and is transmitted through bolts in the later stage of stress. These reinforcement methods are respectively aimed at structural deformation in different periods.
2、本实用新型采用钢板作为加固材料，不仅取材简单，施工方便，而且质量易于控制，另外钢板适用于各种恶劣环境，对高温和强腐蚀性等环境具有很好的实用性。2. The utility model adopts the steel plate as the reinforcing material, which is not only easy to obtain materials, convenient to construct, but also easy to control the quality. In addition, the steel plate is suitable for various harsh environments, and has good practicability for high temperature and strong corrosive environments.
附图说明Description of drawings
图1为本实用新型加固状态的结构示意图；Fig. 1 is the structural representation of the utility model reinforcement state;
图2为本实用新型加固状态的俯视图；Fig. 2 is the plan view of the utility model reinforcement state;
图3为本实用新型布置于框架柱柱顶时的结构示意图。Fig. 3 is a schematic structural view of the utility model when it is arranged on the top of a frame column.
具体实施方式detailed description
下面将结合附图对本实用新型实施例中的技术方案进行清楚、完整地描述。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
如图1-3所示，一种钢板加固结构，包括框架梁1、框架柱2，所述框架梁1为梁体存在上部钢筋截断设计的既有钢筋混凝土梁，框架梁1上部纵向受力钢筋的钢筋走向相同且位于多条平行直线上，所述钢筋走向上的受力钢筋之间的无钢筋区域为框架梁1的钢筋截断区，还包括As shown in Figure 1-3, a steel plate reinforcement structure includes a frame beam 1 and a frame column 2. The frame beam 1 is an existing reinforced concrete beam designed with the upper part of the beam truncated, and the upper part of the frame beam 1 is longitudinally stressed. The reinforcing bars have the same trend and are located on multiple parallel straight lines. The unreinforced area between the stressed reinforcing bars on the reinforcing bar is the bar truncated area of the frame beam 1, which also includes
条形钢板3，包括粘贴区5和位于粘贴区5两端的附加区6，所述条形钢板3紧贴在框架梁1上表面，且粘贴区5覆盖钢筋截断区，附加区6设有间隔设置的螺栓孔(图中未标出)；条形钢板3紧贴框架梁1一侧设有粘接材料(图中未标出)；The strip-shaped steel plate 3 includes a pasting area 5 and an additional area 6 located at both ends of the pasting area 5. The strip-shaped steel plate 3 is closely attached to the upper surface of the frame beam 1, and the pasting area 5 covers the cut-off area of the steel bar. The additional area 6 is provided with an interval The set bolt holes (not marked in the figure); the side of the strip steel plate 3 close to the frame beam 1 is provided with an adhesive material (not marked in the figure);
L型钢板4，所述L型钢板4包括紧贴在条形钢板3附加区6的水平端7和紧贴在框架柱2表面的竖直端8，水平端7设有间隔设置的螺栓孔，竖直端8沿远离水平端7方向依次设有U型件9和螺栓孔；L型钢板4的螺栓孔外设有紧贴在水平端7、竖直端8的钢压板11，所述钢压板11设有螺栓孔，螺栓孔内设有螺栓12，作为本实施例的一种优选，所述螺栓12采用M12螺栓；L型钢板紧贴框架梁1或框架柱2或条形钢板3一侧设有粘接材料；L-shaped steel plate 4, said L-shaped steel plate 4 includes a horizontal end 7 close to the additional area 6 of the strip steel plate 3 and a vertical end 8 close to the surface of the frame column 2, and the horizontal end 7 is provided with bolt holes arranged at intervals , the vertical end 8 is sequentially provided with U-shaped parts 9 and bolt holes along the direction away from the horizontal end 7; the bolt hole of the L-shaped steel plate 4 is provided with a steel pressure plate 11 that is close to the horizontal end 7 and the vertical end 8. Steel platen 11 is provided with bolt hole, and bolt hole is provided with bolt 12, as a kind of preference of this embodiment, described bolt 12 adopts M12 bolt; Adhesive material is provided on one side;
所述U型件9的内表面分别紧贴在L型钢板4的竖直端8和竖直端8两侧的框架柱2表面，U型件9设有压力孔(图中未标出)，压力孔内设有锚栓10，用于将U型件9和框架柱2固定连接，作为本实施例的一种优选，所述锚栓10采用M16锚栓；U型件9内表面设有粘接材料。The inner surface of the U-shaped part 9 is respectively attached to the vertical end 8 of the L-shaped steel plate 4 and the surface of the frame column 2 on both sides of the vertical end 8, and the U-shaped part 9 is provided with a pressure hole (not marked in the figure) , the pressure hole is provided with an anchor bolt 10, which is used to fix the U-shaped piece 9 and the frame column 2. As a preferred embodiment of this embodiment, the anchor bolt 10 adopts an M16 anchor bolt; the inner surface of the U-shaped piece 9 is set With adhesive material.
一种钢板加固结构的施工方法包括：A construction method for a steel plate reinforced structure comprises:
步骤1)计算条形钢板3尺寸，Step 1) calculate the size of strip steel plate 3,
条形钢板宽度w为：The width w of the strip steel plate is:
w＝f′y*A′s/ff*hw=f' y *A' s /f f *h
其中，f′y为受力钢筋的抗拉强度设计值，A′s为受力钢筋的截面面积，ff为条形钢板3的抗拉强度设计值；Wherein, f ' y is the tensile strength design value of stressed steel bar, A ' s is the cross-sectional area of stressed steel bar, f f is the tensile strength design value of strip steel plate 3;
粘贴区5长度l0为：条形钢板3所在的钢筋截断区内钢筋走向上的两端截断钢筋截断处距离的最大值；The length l of the pasting area 5 is: the maximum value of the distance between the two ends of the truncated steel bar on the direction of the steel bar in the steel bar truncated area where the strip steel plate 3 is located;
附加区6长度lsp为：The length l sp of the additional area 6 is:
lsp≥fsp*tsp/fbd+200mml sp ≥f sp *t sp /f bd +200mm
其中，fsp为条形钢板3的抗拉强度设计值，tsp为条形钢板3总厚度，fbd为条形钢板3与混凝土之间的粘结强度设计值；Wherein, f sp is the tensile strength design value of strip steel plate 3, t sp is the total thickness of strip steel plate 3, and f bd is the bond strength design value between strip steel plate 3 and concrete;
步骤2)计算L型钢板4尺寸，Step 2) calculate the size of the L-shaped steel plate 4,
L型钢板4宽度wL为：wL≥w；水平端7长度为1000mm；竖直端8长度为500mm；The width w L of the L-shaped steel plate 4 is: w L ≥ w; the length of the horizontal end 7 is 1000 mm; the length of the vertical end 8 is 500 mm;
步骤3)根据步骤1)、步骤2)和现场施工环境加工条形钢板3和L型钢板4；Step 3) processing strip steel plate 3 and L-shaped steel plate 4 according to step 1), step 2) and on-site construction environment;
步骤4)通过粘接材料将条形钢板3粘贴在框架梁1上表面，且粘贴区5沿长度方向覆盖钢筋截断区；Step 4) Paste the strip steel plate 3 on the upper surface of the frame beam 1 with an adhesive material, and the pasting area 5 covers the cut-off area of the steel bar along the length direction;
步骤5)通过粘接材料将L型钢板4的水平端7和竖直端8外表面分别粘贴在条形钢板3和框架柱2表面，且水平端7螺栓孔与附加区6螺栓孔形成通孔；Step 5) Paste the outer surfaces of the horizontal end 7 and the vertical end 8 of the L-shaped steel plate 4 on the surface of the strip steel plate 3 and the frame column 2 respectively through the bonding material, and the bolt holes of the horizontal end 7 and the bolt holes of the additional area 6 form a connection. hole;
步骤6)在竖直端8靠近水平端7的内表面设置U型件9，U型件9内环面通过粘接材料分别粘贴在竖直端8表面和竖直端8两侧的框架柱2表面，并在U型件9两端压力孔内设置锚栓10，锚栓10穿过螺栓孔14并插入框架柱2内；Step 6) A U-shaped piece 9 is arranged on the inner surface of the vertical end 8 close to the horizontal end 7, and the inner ring surface of the U-shaped piece 9 is respectively pasted on the surface of the vertical end 8 and the frame columns on both sides of the vertical end 8 through an adhesive material 2 surface, and anchor bolts 10 are set in the pressure holes at both ends of the U-shaped piece 9, and the anchor bolts 10 pass through the bolt holes 14 and are inserted into the frame column 2;
步骤7)在竖直端8的螺栓孔外设置钢压板11，螺栓12依次穿过钢压板11和竖直端8的螺栓孔并插入框架柱2内；在水平端7的螺栓孔外设置钢压板11，螺栓12依次穿过钢压板11、水平端7和附加区6的螺栓孔并插入框架梁1内。Step 7) Steel plate 11 is set outside the bolt hole of vertical end 8, and bolt 12 passes through steel plate 11 and the bolt hole of vertical end 8 successively and inserts in frame column 2; The pressure plate 11 and the bolts 12 pass through the bolt holes of the steel pressure plate 11 , the horizontal end 7 and the additional area 6 in sequence and are inserted into the frame beam 1 .
作为本实施例的一种优选，所述L型钢板4设置在框架柱2顶端时，L型钢板4的水平端7和竖直端8内表面分别粘贴在条形钢板3和框架柱2表面，且竖直端8长度为800mm。As a preference of this embodiment, when the L-shaped steel plate 4 is arranged on the top of the frame column 2, the inner surfaces of the horizontal end 7 and the vertical end 8 of the L-shaped steel plate 4 are pasted on the strip steel plate 3 and the surface of the frame column 2 respectively. , and the length of the vertical end 8 is 800mm.
作为本实施例的一种优选，所述条形钢板3需要搭接时，相邻两层钢板的截断位置应错开不小于300mm，并在截断处加设钢压板11和螺栓12进行锚固。As a preference of this embodiment, when the strip-shaped steel plates 3 need to be overlapped, the truncation positions of two adjacent layers of steel plates should be staggered by no less than 300 mm, and steel pressure plates 11 and bolts 12 are added at the truncation positions for anchoring.
所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型的范围。The described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of the present utility model.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106907014A (en) * | 2017-01-23 | 2017-06-30 | 福建工程学院 | A kind of steel plate reinforcement structure and its construction method |
| CZ308319B6 (en) * | 2018-11-07 | 2020-05-06 | České vysoké učenà technické v Praze | Equipment for securing masonry barrel vaults |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907014A (en) * | 2017-01-23 | 2017-06-30 | 福建工程学院 | A kind of steel plate reinforcement structure and its construction method |
| CZ308319B6 (en) * | 2018-11-07 | 2020-05-06 | České vysoké učenà technické v Praze | Equipment for securing masonry barrel vaults |
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