CN206941858U - Band is encorbelmented the structure of attached prestressing force assembled power consumption frame strengthening outside plate framework - Google Patents
Band is encorbelmented the structure of attached prestressing force assembled power consumption frame strengthening outside plate framework Download PDFInfo
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- 238000005728 strengthening Methods 0.000 title claims abstract 10
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
- 239000010959 steel Substances 0.000 claims abstract description 55
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract 5
- 239000004567 concrete Substances 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 210000002435 tendon Anatomy 0.000 description 21
- 230000002787 reinforcement Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 241000173529 Aconitum napellus Species 0.000 description 3
- 229940023019 aconite Drugs 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
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- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
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- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
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Abstract
Description
技术领域technical field
本实用新型涉及土木工程抗震加固技术领域，具体是一种带悬挑板框架外附预应力装配式耗能框架加固的结构。The utility model relates to the technical field of anti-seismic reinforcement of civil engineering, in particular to a reinforced structure with a cantilevered plate frame and a prestressed assembled energy-dissipating frame.
背景技术Background technique
从传统意义上说，提高混凝土框架结构的抗震能力的途径大致可分为提高承载能力(强度型加固)、提高延性(延性型加固)、减少作用于结构上的地震力(消能减震加固)三种主要方式。提高承载能力是通过增加支撑、增加抗震墙、增设外部构架、加大原框架结构截面尺寸等方式，提高结构的抗震能力；提高延性是通过对构件进行延性加固，如对柱增加箍筋、外包钢板箍、碳纤维围束等方式提高构件延性从而提高结构的延性；设置消能减震装置则是通过设置阻尼器、隔震装置等耗散地震能力或隔断地震能量输入，以减轻地震造成的影响。In the traditional sense, the ways to improve the seismic capacity of concrete frame structures can be roughly divided into improving the bearing capacity (strength reinforcement), improving ductility (ductile reinforcement), and reducing the seismic force acting on the structure (energy dissipation and shock absorption reinforcement). ) in three main ways. Improving the bearing capacity is to improve the seismic capacity of the structure by adding supports, adding seismic walls, adding external frames, and increasing the cross-sectional size of the original frame structure, etc.; improving ductility is through ductile reinforcement of components, such as adding stirrups to columns and outsourcing steel plates hoops, carbon fiber enclosures, etc. to improve the ductility of components to improve the ductility of the structure; the installation of energy dissipation and shock absorbing devices is to reduce the impact of earthquakes by setting dampers, seismic isolation devices, etc. to dissipate seismic capacity or block seismic energy input.
附加整体子结构加固就是利用附加整体子结构与原有结构的协同工作，不但可以有效改善结构的整体受力状态，提高结构的抗震性能，而且在加固施工期间可以尽量不中断建筑结构的正常使用，还可以结合建筑的具体情况创造出丰富的建筑效果，是一种经济、合理、高效的结构体系加固方法。The reinforcement of the additional integral substructure is to use the cooperative work of the additional integral substructure and the original structure, which can not only effectively improve the overall stress state of the structure, improve the seismic performance of the structure, but also try not to interrupt the normal use of the building structure during the reinforcement construction , It can also create rich architectural effects in combination with the specific conditions of the building. It is an economical, reasonable and efficient structural system reinforcement method.
目前多数外附子结构加固需进行子结构的现浇作业，会产生污染和噪音，并且施工周期繁杂漫长。此外，外附子结构加固存在一种特殊的连接情况，即原框架结构外伸阳台或外走廊悬挑板，导致外附子结构无法与原框架结构贴合。At present, most external aconite structures need to be cast-in-place for substructures, which will generate pollution and noise, and the construction period is complicated and long. In addition, there is a special connection situation in the reinforcement of the external aconite structure, that is, the overhanging balcony or the cantilever plate of the external corridor of the original frame structure makes the external aconite structure unable to fit the original frame structure.
实用新型内容Utility model content
实用新型目的：为了克服现有技术中存在的不足，本实用新型提供一种带悬挑板框架外附预应力装配式耗能框架加固的结构。Purpose of the utility model: In order to overcome the deficiencies in the prior art, the utility model provides a structure with a cantilevered plate frame externally attached with a prestressed assembled energy-dissipating frame.
技术方案：为解决上述技术问题，本实用新型的一种带悬挑板框架外附预应力装配式耗能框架加固的结构，包括待加固的原框架结构以及外附框架结构，外附框架结构为节点核心区摩擦耗能的预应力装配式结构，其包括预制钢筋混凝土梁和预制钢筋混凝土柱，预制钢筋混凝土梁与预制钢筋混凝土柱连接的端部设置钢套头，钢套头与预制钢筋混凝土柱之间设置摩擦软钢板，预制钢筋混凝土梁与预制钢筋混凝土柱内均设置预应力筋；预制钢筋混凝土梁向外延伸有悬挑板，在悬挑板上打连接孔；原框架结构上也向外延伸有悬挑板，并在悬挑板上打连接孔，预制钢筋混凝土梁上的悬挑板与原框架结构的悬挑板通过螺栓连接。Technical solution: In order to solve the above technical problems, a structure with a cantilevered plate frame and an external prestressed assembled energy-dissipating frame reinforcement of the utility model includes the original frame structure to be reinforced and the external frame structure, and the external frame structure It is a prestressed prefabricated structure for frictional energy dissipation in the core area of the node, which includes prefabricated reinforced concrete beams and prefabricated reinforced concrete columns. Friction soft steel plates are set between the prefabricated reinforced concrete beams and prefabricated reinforced concrete columns are equipped with prestressed tendons; the prefabricated reinforced concrete beams extend outwards with cantilevered plates, and connecting holes are drilled on the cantilevered plates; the original frame structure also A cantilevered slab is extended outside, and connecting holes are drilled on the cantilevered slab, and the cantilevered slab on the prefabricated reinforced concrete beam is connected with the cantilevered slab of the original frame structure through bolts.
其中，钢套头由四块矩形钢板焊接而成，两侧的两块钢板长度大于上方和下方的两 块钢板，两侧钢板伸出距离为预制钢筋混凝土柱截面高度的一半。Among them, the steel sleeve head is welded by four rectangular steel plates, the two steel plates on both sides are longer than the upper and lower two steel plates, and the protruding distance of the steel plates on both sides is half of the section height of the prefabricated reinforced concrete column.
其中，钢套头与预制钢筋混凝土梁通过抗剪栓钉进行连接，预制钢筋混凝土梁端部设有螺旋箍筋，防止预制钢筋混凝土梁端部的混凝土提前压溃，增强端部承载力。Among them, the steel sleeve head and the prefabricated reinforced concrete beam are connected by shear bolts, and the end of the prefabricated reinforced concrete beam is provided with spiral stirrups to prevent the concrete at the end of the prefabricated reinforced concrete beam from crushing in advance and enhance the bearing capacity of the end.
其中，两块摩擦软钢板分别放置在钢套头两侧钢板的内表面，并且在摩擦软钢板、钢套头、节点核心区对应位置打孔，通过穿入螺栓、螺栓两侧紧固螺帽将摩擦软钢板、钢套头、节点核心区紧密连接。Among them, two friction soft steel plates are respectively placed on the inner surface of the steel plates on both sides of the steel sleeve, and holes are drilled in the corresponding positions of the friction soft steel plate, steel sleeve and joint core area, and the friction Mild steel plates, steel sleeves, and node core areas are closely connected.
其中，预制钢筋混凝土柱在预制时一端外伸钢筋，另一端留有灌浆套筒或者波纹管；下层预制钢筋混凝土柱的上端外伸钢筋与上层预制钢筋混凝土柱的下端灌浆套筒或者波纹管进行套筒连接或浆锚搭接。Among them, when the prefabricated reinforced concrete column is prefabricated, one end of the outstretched steel bar is left, and the other end is left with a grouting sleeve or bellows; Sleeve connection or slurry anchor lap.
其中，预制钢筋混凝土梁、预制钢筋混凝土柱内均预留波纹管，以便张拉预应力筋；在本层所有的外附框架节点连接完成后，张拉梁中预应力筋，并在最外侧梁端锚固。Among them, bellows are reserved in the prefabricated reinforced concrete beams and prefabricated reinforced concrete columns to tension the prestressed tendons; Beam end anchorage.
其中，张拉预制钢筋混凝土梁及预制钢筋混凝土柱内的预应力筋前，在预制钢筋混凝土梁及预制钢筋混凝土柱的结合面上浇筑水泥砂浆或环氧砂浆，连接找平，保护节点核心区，同时减小预应力筋的压力损失。Among them, before stretching the prestressed tendons in the prefabricated reinforced concrete beams and prefabricated reinforced concrete columns, cement mortar or epoxy mortar is poured on the joint surface of the prefabricated reinforced concrete beams and prefabricated reinforced concrete columns to level the connection and protect the core area of the joints. At the same time reduce the pressure loss of prestressed tendons.
其中，预制钢筋混凝土柱另设基础，其中的预应力筋一端先锚固在基础中，在预制柱吊装、连接前，先将预应力筋穿过预制钢筋混凝土柱中预埋的波纹管，待所有的预制钢筋混凝土柱对位连接后，张拉其中的预应力筋，并将预应力筋的另一端锚固在柱顶。Among them, the prefabricated reinforced concrete column has another foundation, and one end of the prestressed tendon is first anchored in the foundation. After the prefabricated reinforced concrete columns are connected in place, the prestressed tendons are stretched, and the other end of the prestressed tendons is anchored to the top of the column.
有益效果：本实用新型的一种带悬挑板框架外附预应力装配式耗能框架加固的结构，具有以下有益效果：Beneficial effects: a structure with a cantilevered plate frame externally attached with a prestressed assembled energy-dissipating frame of the utility model has the following beneficial effects:
1、外附框架结构不但以其自身的抗震承载能力和耗能能力贡献于加固后的整体结构的抗震能力，还可改善原框架结构的受力状态和变形模式，使结构形成更合理的损伤屈服机制，从而使原框架结构的抗震能力得到更充分的利用。1. The external frame structure not only contributes to the seismic capacity of the reinforced overall structure with its own seismic bearing capacity and energy dissipation capacity, but also improves the stress state and deformation mode of the original frame structure, so that the structure forms a more reasonable damage Yield mechanism, so that the seismic capacity of the original frame structure can be more fully utilized.
2、外附框架结构外伸悬挑板与原框架结构外伸悬挑板通过螺栓连接，充分发挥了悬挑板的作用，减少现场湿作业，提高施工效率，加固工作在建筑物外部完成，不破坏建筑物的内部装修，不影响建筑物内部活动，外附框架另设基础，相当于原框架结构在该方向多出一跨，增加结构使用面积。2. The overhanging cantilever plate of the attached frame structure is connected with the original frame structure through bolts, which fully exerts the function of the cantilever plate, reduces on-site wet work, improves construction efficiency, and the reinforcement work is completed outside the building. Without destroying the interior decoration of the building, without affecting the internal activities of the building, a separate foundation is set up for the external frame, which is equivalent to adding an extra span to the original frame structure in this direction, increasing the usable area of the structure.
3、外附框架结构中的双向预应力筋实现结构的自复位，减小原框架结构本身的残余变形，并利用节点核心区的钢套头与软钢板的摩擦转动消耗能量，将损伤位置控制在钢套头与摩擦软钢板。3. The two-way prestressed tendons in the external frame structure realize the self-resetting of the structure, reduce the residual deformation of the original frame structure itself, and use the friction and rotation of the steel sleeve head in the core area of the node and the soft steel plate to consume energy, so as to control the damage position at Steel socket with friction soft steel plate.
附图说明Description of drawings
图1为本实用新型中外附预制框架节点构造示意图；Fig. 1 is a schematic diagram of the node structure of the attached prefabricated frame in the utility model;
图2为本实用新型中外附预制框架节点构造细部图；Fig. 2 is a detailed view of the node structure of the attached prefabricated frame in the utility model;
图3为本实用新型中外附预制框架节点构造正视图；Fig. 3 is the front view of the node structure of the external prefabricated frame in the utility model;
图4为本实用新型中外附预制框架节点构造俯视图；Fig. 4 is a top view of the node structure of the external prefabricated frame in the utility model;
图5为本实用新型中预制钢筋混凝土柱基础大样图；Fig. 5 is a large sample diagram of prefabricated reinforced concrete column foundation in the utility model;
图6为本实用新型中外附预制框架示意图(带悬挑板)；Fig. 6 is a schematic diagram of the external prefabricated frame (with cantilevered plate) in the utility model;
图7为本实用新型中原框架结构示意图(带悬挑板)；Fig. 7 is a structural schematic diagram of the Zhongyuan frame of the utility model (with cantilevered plate);
图8为本实用新型中外附框架与原框架连接方法示意图；Fig. 8 is a schematic diagram of the connection method between the external frame and the original frame in the utility model;
图9为本实用新型中外附框架与原框架连接方法侧视图；Fig. 9 is a side view of the connection method between the external frame and the original frame in the utility model;
图10为本实用新型中外附框架与原框架连接方法俯视图；Fig. 10 is a top view of the connection method between the external frame and the original frame in the utility model;
图11为本实用新型中外附框架连接完成示意图；Fig. 11 is a schematic diagram of completion of the connection of the external frame in the utility model;
图12为本实用新型中外附框架连接完成侧视图；Fig. 12 is a side view of the connection of the external attached frame in the utility model;
图13为本实用新型中外附框架连接完成俯视图；Fig. 13 is a top view of the connection of the external attached frame in the utility model;
图中：1-原框架结构，2-外附框架结构，3-预制钢筋混凝土梁，4-预制钢筋混凝土柱，5-悬挑板，6-悬挑板，7-外伸钢筋，9-节点核心区，10-梁端削弱面，11-节点核心区削弱截面，12-钢套头，13-摩擦软钢板，14-预应力筋，15-预应力筋，16-基础，17-连接孔，18-连接孔，19-钢套头连接孔，20-软钢板连接孔，21-节点核心区连接孔，22-对拉螺栓，23-螺帽，24-波纹管。In the figure: 1-original frame structure, 2-external frame structure, 3-prefabricated reinforced concrete beam, 4-prefabricated reinforced concrete column, 5-cantilevered slab, 6-cantilevered slab, 7-extruded steel bar, 9- Node core area, 10-beam end weakened surface, 11-node core area weakened section, 12-steel sleeve, 13-friction soft steel plate, 14-prestressed tendon, 15-prestressed tendon, 16-foundation, 17-connection hole , 18-connection hole, 19-steel sleeve connection hole, 20-mild steel plate connection hole, 21-joint core area connection hole, 22-pull bolt, 23-nut, 24-bellows.
具体实施方式detailed description
下面结合附图对本实用新型作更进一步的说明。Below in conjunction with accompanying drawing, the utility model is described further.
本实用新型提供了一种带悬挑板框架外附预应力装配式耗能框架加固的结构，利用原框架结构1中外伸的悬挑板6，将外附框架结构2与原框架结构1连接。预应力筋14、预应力筋15实现结构自复位，外附框架结构的节点核心区9摩擦实现耗能。The utility model provides a structure reinforced with a prestressed assembled energy-dissipating frame with a cantilevered plate frame. The externally attached frame structure 2 is connected to the original frame structure 1 by using the overhanging cantilevered plate 6 in the original frame structure 1. . The prestressed tendons 14 and the prestressed tendons 15 realize structural self-resetting, and the friction of the node core area 9 of the external frame structure realizes energy consumption.
具体地，如图1-4所示，本实用新型包括待加固的原框架结构1，外附框架结构2以及两者之间的悬挑板5和悬挑板6。外附框架结构2为节点核心区9摩擦耗能的预应力装配式结构，由预制钢筋混凝土梁3、预制钢筋混凝土柱4、钢套头12、摩擦软钢板13等组成，并在装配完成后张拉预制钢筋混凝土梁3中预应力筋14，节点无后浇段。预制钢筋混凝土柱4在楼层中部进行连接，其中穿有预应力筋15。Specifically, as shown in Figures 1-4, the utility model includes an original frame structure 1 to be reinforced, an external frame structure 2, and a cantilevered plate 5 and a cantilevered plate 6 between them. The external frame structure 2 is a prestressed prefabricated structure with frictional energy consumption in the node core area 9, which is composed of prefabricated reinforced concrete beams 3, prefabricated reinforced concrete columns 4, steel sleeves 12, friction soft steel plates 13, etc., and tensioned after the assembly is completed. Pull the prestressed tendon 14 in the prefabricated reinforced concrete beam 3, and the node has no post-cast section. Prefabricated reinforced concrete columns 4 are connected in the middle of the floor, and prestressed tendons 15 are pierced therein.
钢套头12由四块矩形钢板焊接而成，两侧的两块钢板长度大于上下两面的钢板长度；预制钢筋混凝土梁3端部局部削弱，以便套上钢套头12。外附框架梁3在吊装前，将钢套头12与梁端削弱面10通过抗剪栓钉进行连接；预制钢筋混凝土梁3端部设有螺旋箍筋，防止梁端混凝土提前压溃，进一步增强预制钢筋混凝土梁3端部承载力。The steel sleeve 12 is welded by four rectangular steel plates, and the length of the two steel plates on both sides is greater than the length of the steel plates on the upper and lower sides; Before the external frame beam 3 is hoisted, the steel sleeve 12 and the beam end weakened surface 10 are connected by shear bolts; the end of the prefabricated reinforced concrete beam 3 is provided with spiral stirrups to prevent the concrete at the beam end from crushing in advance and further strengthen the Prefabricated reinforced concrete beam 3 end bearing capacity.
节点核心区9局部削弱，并嵌入摩擦软钢板13；摩擦软钢板13外侧与钢套头12外伸的钢板相连，钢套头12外表面与预制钢筋混凝土梁3侧面在同一平面。钢套头12、 摩擦软钢板13、节点核心区9对应位置打钢套头连接孔19、软钢板连接孔20、节点核心区连接孔21，并保证孔贯通连接。穿入对拉螺栓22并紧固螺帽23，将钢套头12、摩擦软钢板13、节点核心区9紧密连接。The joint core area 9 is partially weakened and embedded with a friction soft steel plate 13; the outer side of the friction soft steel plate 13 is connected with the steel plate extending from the steel collar 12, and the outer surface of the steel collar 12 is on the same plane as the side of the prefabricated reinforced concrete beam 3. Steel sleeve head 12, friction soft steel plate 13, joint core area 9 corresponding positions punch steel sleeve head connection hole 19, mild steel plate connection hole 20, joint core area connection hole 21, and ensure that the holes are connected. Penetrate the pull bolts 22 and tighten the nuts 23 to tightly connect the steel sleeve 12, the friction soft steel plate 13 and the node core area 9.
预制钢筋混凝土柱4在预制时一端外伸钢筋7，另一端预留孔洞；下层柱上端外伸钢筋7与上层柱下端的预留孔洞进行套筒连接或浆锚搭接。When the prefabricated reinforced concrete column 4 is prefabricated, one end of the outrigger 7 is reserved, and the other end is reserved for holes; the upper end of the lower column for the outstretched steel bar 7 is connected with the reserved hole for the lower end of the upper column by sleeve connection or slurry anchor lap.
预制钢筋混凝土梁3、预制钢筋混凝土柱4内均预留波纹管24，以便张拉预应力筋14、预应力筋15。在本层所有的外附框架结构2节点核心区9连接完成后，张拉梁中预应力筋14，并在最外侧梁端锚固；张拉预应力筋14前，在梁柱结合面上浇筑水泥砂浆或环氧砂浆，连接找平，保护节点核心区9，同时减小预应力筋14的压力损失。Bellows 24 are reserved in the prefabricated reinforced concrete beam 3 and the prefabricated reinforced concrete column 4 so as to stretch the prestressed tendons 14 and 15 . After the connection of the core area 9 of all the external frame structures 2 nodes of this floor is completed, the prestressed tendons 14 in the tension beam are anchored at the outermost beam ends; before the prestressed tendons 14 are stretched, pouring Cement mortar or epoxy mortar, leveling the connection, protecting the joint core area 9, and reducing the pressure loss of the prestressed tendon 14 at the same time.
如图5所示，预制钢筋混凝土柱4另设基础16，柱中预应力筋15一端先锚固在基础16中，在预制柱4吊装、连接前，先将预应力筋15穿过柱中预埋波纹管24，待所有的预制钢筋混凝土柱4对位连接后，张拉柱中预应力筋15，并将预应力筋15的另一端锚固在柱顶。As shown in Figure 5, the prefabricated reinforced concrete column 4 is provided with a foundation 16, and one end of the prestressed tendon 15 in the column is first anchored in the foundation 16. Buried bellows 24, after all the prefabricated reinforced concrete columns 4 are connected in position, the prestressed tendons 15 in the tensioned columns, and the other end of the prestressed tendons 15 are anchored on the top of the column.
如图6-13所示，外附框架结构2外伸悬挑板5，悬挑板5与预制钢筋混凝土梁3一起预制，并在悬挑板5上打连接孔17；悬挑板5与预制钢筋混凝土梁的连接面在预制钢筋混凝土梁侧面中线以下，悬挑板5不经过预制钢筋混凝土梁的梁端削弱面10。在原结构外伸悬挑板6打连接孔18，连接孔18位置与外附框架外伸悬挑板5的连接孔17位置相对应，并通过对拉螺栓22连接。连接孔17、连接孔18应该避开悬挑板5、悬挑板6内部的纵筋以及构造筋。As shown in Figure 6-13, the external frame structure 2 protrudes from the cantilevered slab 5, and the cantilevered slab 5 is prefabricated together with the prefabricated reinforced concrete beam 3, and the connecting holes 17 are drilled on the cantilevered slab 5; the cantilevered slab 5 and the The connecting surface of the prefabricated reinforced concrete beam is below the midline of the side of the prefabricated reinforced concrete beam, and the cantilevered plate 5 does not pass through the weakened surface 10 of the beam end of the prefabricated reinforced concrete beam. Drill connecting holes 18 on the overhanging cantilever plate 6 of the original structure, and the position of the connecting hole 18 corresponds to the position of the connecting hole 17 of the overhanging cantilever plate 5 of the external attached frame, and is connected by the pull bolt 22 . The connecting holes 17 and 18 should avoid the longitudinal ribs and structural ribs inside the cantilevered plate 5 and the cantilevered plate 6 .
以上所述仅是本实用新型的优选实施方式，应当指出：对于本技术领域的普通技术人员来说，在不脱离本实用新型原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本实用新型的保护范围。The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.
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| CN107152097A (en) * | 2017-05-12 | 2017-09-12 | 东南大学 | Band attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening |
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| CN107152097A (en) * | 2017-05-12 | 2017-09-12 | 东南大学 | Band attached prestressing force assembled outside plate framework of encorbelmenting consumes energy the structure of frame strengthening |
| CN108277998A (en) * | 2018-04-04 | 2018-07-13 | 四川森宇建筑工程有限公司 | A kind of concrete strengthening wall body structure |
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| CN110735538A (en) * | 2019-08-20 | 2020-01-31 | 东南大学 | Assembled reinforced structure with external contact surface energy consumption of existing structure |
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