CN110158769A - Full assembled is bolted Self-resetting bean column node, installation method and self-resetting method - Google Patents
Full assembled is bolted Self-resetting bean column node, installation method and self-resetting method Download PDFInfo
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- CN110158769A CN110158769A CN201910409090.2A CN201910409090A CN110158769A CN 110158769 A CN110158769 A CN 110158769A CN 201910409090 A CN201910409090 A CN 201910409090A CN 110158769 A CN110158769 A CN 110158769A
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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Abstract
本发明公开了一种全装配式螺栓连接自复位梁柱节点、安装方法及自复位方法，梁柱节点包括预制混凝土柱、预制混凝土梁、梁内纵筋、粘弹性材料以及螺帽底座。梁内纵筋的一端伸出预制混凝土梁，穿过预制混凝土柱上的预留孔，此时梁柱对应预埋钢板端部对接，进而用摩擦型高强螺栓固定，形成梁柱螺栓连接节点，粘弹性材料置于预制柱预埋钢板套筒内，且螺纹钢筋穿过粘弹性材料中空部分，用螺帽底座与螺纹钢筋端部螺纹拧紧固定，最后通过柱预留灌浆孔少量灌浆。本发明全装配式螺栓连接自复位梁柱节点在地震作用下，节点处发生转动，梁纵向钢筋受力带动螺帽底座挤压粘弹性材料耗能，产生强恢复能力回拉钢筋，使结构形成自复位系统。
The invention discloses a fully assembled bolt-connected self-resetting beam-column node, an installation method and a self-resetting method. The beam-column node includes a prefabricated concrete column, a prefabricated concrete beam, longitudinal reinforcement in the beam, a viscoelastic material and a nut base. One end of the longitudinal reinforcement in the beam protrudes from the precast concrete beam and passes through the reserved hole on the precast concrete column. At this time, the beam and column correspond to the end of the embedded steel plate butt joint, and then fixed with friction-type high-strength bolts to form a beam-column bolt connection node. The viscoelastic material is placed in the pre-embedded steel plate sleeve of the prefabricated column, and the threaded steel bar passes through the hollow part of the viscoelastic material, and the nut base and the end of the threaded steel bar are screwed and fixed, and finally a small amount of grouting is grouted through the grouting hole reserved for the column. Under the action of an earthquake, the self-resetting beam-column node of the fully assembled bolt connection of the present invention rotates at the node, and the force on the longitudinal steel bar of the beam drives the nut base to squeeze the viscoelastic material to consume energy, thereby generating strong recovery ability and pulling back the steel bar, so that the structure is formed Self-resetting system.
Description
技术领域technical field
本发明具体涉及一种全装配式螺栓连接自复位梁柱节点、安装方法及自复位方法，适用于预制装配式混凝土框架结构的干连接节点，属于装配式建筑工程结构技术领域。The invention specifically relates to a fully assembled bolt-connected self-resetting beam-column node, an installation method and a self-resetting method, which are suitable for dry connection nodes of prefabricated assembled concrete frame structures, and belong to the technical field of assembled building engineering structures.
背景技术Background technique
装配式结构具有质量好、生产效率高、工人劳动强度低、保护环境等优点，因此工程界的专家积极倡导应用装配式混凝土结构。梁柱连接节点是预制混凝土结构的重要组成部分，主要有干连接和湿连接两种方式，湿连接节点抗震性能良好，基本接近现浇混凝土节点性能。但后浇节点狭小的作业空间，大大增加了其箍筋设置和混凝土浇筑的难度，施工质量难以保证。干连接节点能够确保刚度和承载力类似于现浇结构，不过恢复力性和延性较差，难以防止地震荷载作用下产生的破坏，但较于湿连接具有施工便捷的特点，更符合建筑产业化发展的趋势。Prefabricated structures have the advantages of good quality, high production efficiency, low labor intensity, and environmental protection. Therefore, experts in the engineering field actively advocate the application of prefabricated concrete structures. Beam-column joints are an important part of precast concrete structures. There are mainly two types of dry joints and wet joints. The wet joints have good seismic performance and are basically close to the performance of cast-in-place concrete joints. However, the narrow working space of post-pouring joints greatly increases the difficulty of setting stirrups and pouring concrete, and the construction quality is difficult to guarantee. Dry joints can ensure stiffness and bearing capacity similar to cast-in-place structures, but their resilience and ductility are poor, and it is difficult to prevent damage under earthquake loads. However, compared with wet joints, they have the characteristics of convenient construction and are more in line with building industrialization development trend.
干连接中的螺栓连接由于其安装方便的施工特点备受业内关注。为了满足整体框架的结构要求，每个连接件必须能够安全地将剪切力和弯曲力矩从一个预制构件传递到另一个预制构件。梁和柱之间的力传递及其对整体框架性能的影响取决于连接件的特性。因此如何保障预制构件之间连接的性能和结构整体的性能是一项亟待解决的问题。The bolted connection in the dry connection has attracted much attention in the industry due to its convenient installation and construction characteristics. To meet the structural requirements of a monolithic frame, each connection must be able to safely transfer shear and bending moments from one precast element to another. The force transfer between beams and columns and its effect on overall frame performance depends on the properties of the connectors. Therefore, how to ensure the performance of the connection between prefabricated components and the performance of the overall structure is an urgent problem to be solved.
发明内容Contents of the invention
根据上述现有技术存在的一些弊端，本发明提供一种全装配式螺栓连接自复位梁柱节点，该节点采用螺栓连接方式：预制梁外伸螺纹钢筋穿过柱预留孔，此时梁柱对应预埋钢板端部对接，进而用摩擦型高强螺栓固定，形成梁柱螺栓连接节点，之后将粘弹性材料置于预制柱预埋钢板套筒内，且螺纹钢筋穿过粘弹性材料中空部分，进而用螺帽底座与螺纹钢筋端部螺纹拧紧固定，最后通过柱预留灌浆孔少量灌浆，使梁钢筋和柱有效连接，增加梁柱整体性。其中，带预埋钢板预制梁柱在工厂制作，现场拼接过程只有少量灌浆，属于干式连接，施工方便，节省工期。在地震作用下，节点处发生转动，导致梁纵向钢筋受力带动螺帽底座挤压粘弹性材料耗能，同时预埋钢板套筒对粘弹性材料的约束作用，产生强恢复能力回拉钢筋，使结构形成自复位系统，能有效提升建筑物的安全性能。According to some disadvantages of the above-mentioned prior art, the present invention provides a fully assembled bolt-connected self-resetting beam-column joint. The ends of the corresponding pre-embedded steel plates are butted, and then fixed with friction-type high-strength bolts to form a beam-column bolt connection node, and then the viscoelastic material is placed in the pre-embedded steel plate sleeve of the precast column, and the threaded steel bar passes through the hollow part of the viscoelastic material. Then use the nut base and the end of the threaded steel bar to be screwed and fixed, and finally grout a small amount through the grouting hole reserved for the column, so that the beam steel bar and the column are effectively connected, and the integrity of the beam and column is increased. Among them, the prefabricated beams and columns with pre-embedded steel plates are manufactured in the factory, and only a small amount of grouting is required in the on-site splicing process, which is a dry connection, which is convenient for construction and saves construction time. Under the action of the earthquake, the joints rotate, causing the longitudinal reinforcement of the beam to drive the nut base to squeeze the viscoelastic material to dissipate energy. At the same time, the pre-embedded steel plate sleeve restrains the viscoelastic material, resulting in a strong recovery ability to pull back the reinforcement. The structure forms a self-resetting system, which can effectively improve the safety performance of the building.
为实现上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种全装配式螺栓连接自复位梁柱节点，包括预制混凝土梁、预制混凝土柱，所述的预制混凝土梁端部设有第一钢板，所述的预制混凝土柱靠近梁侧设有第二钢板，背对梁侧设有第三钢板，所述预制混凝土梁端部的第一钢板和预制混凝土柱的第二钢板之间通过螺栓连接；A fully assembled bolt-connected self-resetting beam-column node, including a precast concrete beam and a precast concrete column, the end of the precast concrete beam is provided with a first steel plate, and the precast concrete column is provided with a second steel plate near the beam A third steel plate is provided on the side facing away from the beam, and the first steel plate at the end of the precast concrete beam and the second steel plate of the precast concrete column are connected by bolts;
所述预制混凝土梁内部设有梁内纵筋，所述梁内纵筋的一端伸出所述预制混凝土梁设置，并且梁内纵筋伸出部分的末端具有螺纹连接部；The inside of the precast concrete beam is provided with beam inner longitudinal reinforcement, one end of the beam inner longitudinal reinforcement protrudes from the precast concrete beam, and the end of the beam inner longitudinal reinforcement protruding part has a threaded connection;
所述预制混凝土柱、以及预制混凝土柱两侧的第二钢板和第三钢板上均预留供所述梁内纵筋穿过的孔道；The prefabricated concrete column, as well as the second steel plate and the third steel plate on both sides of the precast concrete column are reserved for the passage of the longitudinal reinforcement in the beam;
预制混凝土梁之间通过第二钢板内侧焊接弯起钢筋，所述弯起钢筋与预制柱内部的钢筋笼绑扎组合；The prefabricated concrete beams are bent and bent by welding the inner side of the second steel plate, and the bent steel bars are combined with the reinforcement cage inside the prefabricated column;
第三钢板的外侧对应所述孔道的位置固定设有中空钢套筒，所述中空钢套筒内嵌套设有粘弹性材料耗能单元，所述粘弹性耗能单元的中心设有供所述梁内纵筋穿过的孔道，所述梁内纵筋带螺纹连接部的一端依次穿过第二钢板、预制混凝土柱、第三钢板以及粘弹性耗能单元后与一螺帽底座螺纹连接，当所述梁内纵筋受力时带动所述螺帽底座挤压粘弹性耗能单元在所述中空钢套筒中变形挤压耗能；The outer side of the third steel plate is fixedly provided with a hollow steel sleeve corresponding to the position of the tunnel, and a viscoelastic material energy dissipation unit is embedded in the hollow steel sleeve, and the center of the viscoelastic energy dissipation unit is provided with a The tunnel through which the longitudinal reinforcement in the beam passes, one end of the threaded connection part of the longitudinal reinforcement in the beam passes through the second steel plate, the prefabricated concrete column, the third steel plate and the viscoelastic energy dissipation unit in sequence, and then is screwed to a nut base , when the longitudinal reinforcement in the beam is stressed, the nut base is driven to extrude the viscoelastic energy dissipation unit to deform and extrude energy dissipation in the hollow steel sleeve;
预制混凝土柱上设置灌浆孔，所述灌浆孔与所述孔道相连通。A grouting hole is arranged on the prefabricated concrete column, and the grouting hole communicates with the tunnel.
所述中空钢套筒与所述梁内纵筋同轴心，并且梁内纵筋伸出第三钢板一侧长度与中空钢套筒的长度相同。The hollow steel sleeve is coaxial with the inner longitudinal reinforcement of the beam, and the length of the inner longitudinal reinforcement of the beam protruding from the side of the third steel plate is the same as the length of the hollow steel sleeve.
所述粘弹性耗能单元为内嵌在中空刚套筒内腔中的柱形粘弹性材料，所述柱形粘弹性材料的中间设有供梁内纵筋穿过的孔道，柱形粘弹性材料的外径比中空钢套筒内径小，柱形粘弹性材料的长度为中空钢套筒长度与螺帽底座长度之差。The viscoelastic energy-dissipating unit is a cylindrical viscoelastic material embedded in the inner cavity of the hollow rigid sleeve, and a hole is provided in the middle of the cylindrical viscoelastic material for the longitudinal ribs in the beam to pass through, and the cylindrical viscoelastic The outer diameter of the material is smaller than the inner diameter of the hollow steel sleeve, and the length of the cylindrical viscoelastic material is the difference between the length of the hollow steel sleeve and the length of the nut base.
所述螺栓为摩擦型高强螺栓。The bolts are high-strength friction bolts.
本发明进一步公开了一种基于所述全装配式螺栓连接自复位梁柱节点的安装方法，所述预制混凝土柱与预制混凝土梁在工厂预制完成，将梁内纵筋向外伸出的螺纹连接部依次穿过第二钢板、预制混凝土柱、第三钢板以及粘弹性耗能单元后与一螺帽底座螺纹连接，此时，梁端第一钢板和柱侧第二钢板接触顶死，进而将预制混凝土梁、预制混凝土柱一侧第二钢板之间通过对应的螺栓孔对齐，用螺栓拧紧固定，形成螺栓连接节点；The invention further discloses an installation method based on the self-resetting beam-column joint of the fully-assembled bolt connection, the prefabricated concrete column and the prefabricated concrete beam are prefabricated in the factory, and the longitudinal reinforcement in the beam is screwed together part passes through the second steel plate, the prefabricated concrete column, the third steel plate and the viscoelastic energy dissipation unit in sequence, and then is screwed to a nut base. Align the precast concrete beam and the second steel plate on one side of the precast concrete column through the corresponding bolt holes, and tighten and fix them with bolts to form a bolt connection node;
最后通过所述灌浆孔向预制混凝土柱内少量灌浆，使预制混凝土梁内的梁内纵筋和预制混凝土柱之间有效连接，增加梁柱整体性。Finally, a small amount of grout is poured into the precast concrete column through the grouting hole, so that the longitudinal reinforcement in the beam in the precast concrete beam is effectively connected with the precast concrete column, and the integrity of the beam column is increased.
所述灌浆为灌注比结构所用高一等级的混凝土或钢纤维混凝土或环氧树脂。The grouting is pouring a grade of concrete or steel fiber concrete or epoxy resin higher than that used in the structure.
本发明进一步公开了一种基于所述全装配式螺栓连接自复位梁柱节点的自复位方法，在地震作用下，混凝土梁柱连接节点处产生转动，连接钢板屈服变形后，梁内纵筋受力带动螺帽底座挤压粘弹性材料耗能，同时预埋钢板套筒对粘弹性材料的约束作用，产生强恢复能力回拉钢筋，使结构形成自复位系统。The invention further discloses a self-resetting method based on the self-resetting beam-column joint of the fully assembled bolt connection. The force drives the nut base to extrude the viscoelastic material to dissipate energy, and at the same time, the pre-embedded steel plate sleeve restrains the viscoelastic material, producing strong recovery ability to pull back the steel bar, so that the structure forms a self-resetting system.
相比于现有技术，本发明技术方案具有的有益效果为：Compared with the prior art, the technical solution of the present invention has the beneficial effects of:
一、干连接中的螺栓节点是一种半刚性节点，在耗能能力上优于焊接及牛腿刚性连接，但承载力通常比刚性节点差，本发明利用预埋钢板及摩擦型高强螺栓将预制梁柱连接成整体，用加设在柱预埋钢板上的粘弹性挤压耗能装置与梁内纵筋相连，在地震作用下，节点处发生转动，导致梁纵向钢筋受力带动螺帽底座挤压粘弹性材料可耗散一部分地震作用对节点造成的损伤，变相的增加了螺栓节点的承载力。1. The bolt joint in the dry connection is a semi-rigid joint, which is superior to welding and corbel rigid joints in terms of energy dissipation capacity, but the bearing capacity is usually worse than that of rigid joints. The present invention utilizes embedded steel plates and friction-type high-strength bolts to The prefabricated beam-column is connected as a whole, and the viscoelastic extrusion energy-dissipating device added to the pre-embedded steel plate of the column is connected with the longitudinal reinforcement of the beam. The extruded viscoelastic material of the base can dissipate part of the damage caused by the earthquake to the joints, and increase the bearing capacity of the bolted joints in a disguised form.
二、由于粘弹性材料在受挤压后可恢复变形的这一固有特性，以及钢套筒在粘弹性材料变形后的一个约束作用，在钢筋变形带动挤压粘弹性之后，使结构回拉，形成了一种具有自复位功能的新型干连接耗能减震螺栓节点。2. Due to the inherent characteristic that the viscoelastic material can recover its deformation after extrusion, and the restraining effect of the steel sleeve after the deformation of the viscoelastic material, the structure will be pulled back after the deformation of the steel bar drives the extrusion viscoelasticity. A new type of energy-dissipating shock-absorbing bolt joint of dry connection with self-resetting function is formed.
附图说明Description of drawings
图1是本发明一种全装配式螺栓连接自复位梁柱节点的结构示意图；Fig. 1 is a structural schematic diagram of a self-resetting beam-column node of a fully assembled bolt connection of the present invention;
图2是本发明预制混凝土柱连接第一钢板一侧的侧视图；Fig. 2 is a side view of the side of the first steel plate connected to the precast concrete column of the present invention;
图3是本发明预制混凝土柱连接第二钢板一侧的侧视图；Fig. 3 is a side view of one side of the second steel plate connected to the prefabricated concrete column of the present invention;
图4是预制混凝土柱的立体图；Fig. 4 is a perspective view of a prefabricated concrete column;
图5是本发明预制混凝土梁的结构示意图；Fig. 5 is the structural representation of prefabricated concrete beam of the present invention;
图6是预制混凝土梁的立体图；Fig. 6 is a perspective view of a prefabricated concrete beam;
图7是本发明螺纹钢筋结构示意图；Fig. 7 is a structural schematic diagram of threaded steel bar of the present invention;
图8是本发明粘弹性材料结构示意图；Fig. 8 is a schematic structural view of the viscoelastic material of the present invention;
图9是本发明螺帽底座示意图；Fig. 9 is a schematic diagram of a nut base of the present invention;
图10是本发明未加底部螺帽示意图；Fig. 10 is a schematic diagram of the present invention without adding a bottom nut;
图11是图1的立体图；Figure 11 is a perspective view of Figure 1;
图12是节点在地震作用下的变形图；Fig. 12 is a deformation diagram of a node under an earthquake;
图中：1、预制混凝土柱；1-1、预留灌浆孔；2、预制混凝土梁；2-1、梁内纵筋；3、摩擦型高强螺栓；4、粘弹性材料；5、螺帽底座。In the figure: 1. Precast concrete column; 1-1. Reserved grouting hole; 2. Precast concrete beam; 2-1. Longitudinal reinforcement inside the beam; 3. Friction-type high-strength bolt; 4. Viscoelastic material; 5. Nut base.
具体实施方式Detailed ways
为了使发明内容更加易懂，下面根据附图叙述具体实施方式：In order to make the content of the invention more understandable, the following describes the specific implementation according to the accompanying drawings:
实施例1Example 1
如图1至图10所示，本发明所述的是一种全装配式螺栓连接自复位梁柱节点，其中，所述预制混凝土柱1与预制混凝土梁2在工厂预制完成，预制混凝土柱的一端端部两侧预埋钢板焊弯起钢筋，与柱钢筋笼绑扎组合且置于柱截面两侧正中心槽口的位置。As shown in Figures 1 to 10, what the present invention describes is a fully assembled bolt-connected self-resetting beam-column node, wherein the prefabricated concrete column 1 and the prefabricated concrete beam 2 are prefabricated in the factory, and the prefabricated concrete column The pre-embedded steel plates on both sides of one end end are welded to bend the steel bars, bound and combined with the column reinforcement cage, and placed at the center notches on both sides of the column section.
梁内纵筋2-1穿过梁端预埋钢板预留孔，此时梁柱预埋钢板顶死，进而将预制混凝土梁、预制混凝土柱上的预埋钢板通过对应的四个螺栓孔对齐，用摩擦型高强螺栓3拧紧固定，形成螺栓连接节点，进而将粘弹性材料4置于预制柱预埋钢板套筒内，且梁内纵筋2-1穿过粘弹性材料4中空部分，进而用螺帽底座5与螺纹钢筋端部螺纹拧紧固定，最后通过柱预留灌浆孔1-1少量灌浆，使梁钢筋和柱有效连接，增加梁柱整体性。The longitudinal reinforcement 2-1 in the beam passes through the reserved hole of the pre-embedded steel plate at the end of the beam. At this time, the pre-embedded steel plate on the beam column is topped, and then the pre-embedded steel plate on the precast concrete beam and precast concrete column is aligned through the corresponding four bolt holes. , tighten and fix with friction type high-strength bolts 3 to form a bolt connection node, and then place the viscoelastic material 4 in the pre-embedded steel plate sleeve of the prefabricated column, and the longitudinal rib 2-1 in the beam passes through the hollow part of the viscoelastic material 4, and then Use the nut base 5 to tighten and fix the threads on the end of the threaded steel bar, and finally grout a small amount of grout through the reserved grouting hole 1-1 of the column, so that the beam steel bar and the column are effectively connected, and the integrity of the beam and column is increased.
在地震作用下，混凝土梁柱连接节点处产生转动，连接钢板屈服变形后，梁内纵筋受力带动螺帽底座挤压粘弹性材料耗能，同时预埋钢板套筒对粘弹性材料的约束作用，产生强恢复能力回拉钢筋，使结构形成自复位系统，能有效提升建筑物的安全性能。Under the action of the earthquake, the joints of the concrete beam-column joints rotate, and after the connecting steel plate yields and deforms, the longitudinal reinforcement in the beam drives the nut base to squeeze the viscoelastic material to dissipate energy, and at the same time, the embedded steel plate sleeve constrains the viscoelastic material It produces a strong recovery ability to pull back the steel bars, so that the structure forms a self-resetting system, which can effectively improve the safety performance of the building.
实施例2Example 2
本发明一个优选实施例中，该形式可用于墙柱连接，具体连接方法与实施例1类似。上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。在上述说明的基础上还可以做出其它不同形式的变化或变动。In a preferred embodiment of the present invention, this form can be used for wall stud connection, and the specific connection method is similar to Embodiment 1. The above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. On the basis of the above description, other changes or changes in different forms can also be made.
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Application publication date: 20190823 |