CN106593059A - Dog-bone joint beam end buckling constraining device - Google Patents
Dog-bone joint beam end buckling constraining device Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 70
- 239000010959 steel Substances 0.000 claims abstract description 70
- 239000000945 filler Substances 0.000 claims abstract description 17
- 230000000452 restraining effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000003351 stiffener Substances 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 20
- 238000007906 compression Methods 0.000 abstract description 20
- 206010023230 Joint stiffness Diseases 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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Abstract
本发明提出了一种狗骨式节点梁端屈曲约束装置，该装置包括设置于带有狗骨式节点的钢梁(7)端上下翼缘削弱部位(7‑1)外侧的约束盖板(1)、翼缘削弱部位对应腹板两侧的约束槽钢(2)、约束盖板与约束槽钢之间的填充板(3)及将所述约束盖板、约束槽钢和填充板连接组成完整约束装置的连接螺栓(4)。地震时，梁端翼缘削弱部位先于其它部位及构件屈服，利用滞回特性耗散地震能量，而该约束装置可限制梁端翼缘削弱部位受压及对应腹板受压和受剪时在钢板平面外可能发生的大幅值屈曲，防止翼缘削弱部位疲劳寿命降低及节点刚度、强度退化，防止节点区钢梁(7)发生平面外整体屈曲，保证滞回曲线饱满，提高节点变形能力、延性及梁侧向稳定性。
The present invention proposes a dog-bone joint beam end buckling constraint device, which includes a restraint cover plate ( 1), the weakened part of the flange corresponds to the restraint channel steel on both sides of the web plate (2), the filler plate between the restraint cover plate and the restraint channel steel (3), and the connection of the restraint cover plate, restraint channel steel and filler plate The connecting bolts (4) that make up the complete restraint. During an earthquake, the weakened part of the beam end flange yields before other parts and components, and the hysteresis characteristic is used to dissipate the seismic energy, and the restraint device can limit the compression of the weakened part of the beam end flange and the corresponding web under compression and shearing outside the plane of the steel plate Large-scale buckling that may occur prevents fatigue life reduction at flange weakened parts and joint stiffness and strength degradation, prevents out-of-plane overall buckling of steel beams (7) in the joint area, ensures plump hysteretic curves, and improves joint deformation capacity, ductility and beam strength. lateral stability.
Description
技术领域technical field
本发明属于建筑工程领域，涉及钢框架结构，具体为一种应用于钢框架结构狗骨式节点梁端的屈曲约束装置。The invention belongs to the field of construction engineering and relates to a steel frame structure, in particular to a buckling restraint device applied to the end of a dog-bone joint beam of a steel frame structure.
背景技术Background technique
我国是一个地震多发区，随着钢结构在建筑结构中广泛应用，研究其抗震性能，提出合理的抗震设计对策显得尤为重要。而在1994年美国北岭地震和1995年日本阪神地震之后，人们越来越关注钢结构节点的结构形式和抗震性能，在对传统梁柱节点进行研究分析的基础上，提出了很多改进的新型节点形式，主要可分为加强型和削弱型两大类。近些年出现的狗骨式节点属于一种削弱型新型节点形式，在离梁柱连接处一定距离的梁端减小了翼缘尺寸，其基本设计思想是：通过梁端翼缘的削弱，诱导梁端塑性铰截面从梁柱连接处外移，以避开梁柱连接处残余应力集中区域，改善节点耗能性能的发挥。my country is an earthquake-prone area. With the widespread application of steel structures in building structures, it is particularly important to study their seismic performance and propose reasonable seismic design countermeasures. After the 1994 Northridge earthquake in the United States and the 1995 Hanshin earthquake in Japan, people paid more and more attention to the structural form and seismic performance of steel structure joints. On the basis of research and analysis of traditional beam-column joints, many improved new Node forms can be mainly divided into two categories: strengthened and weakened. The dog-bone joint that appeared in recent years belongs to a new type of weakened joint form. The size of the flange is reduced at the beam end at a certain distance from the beam-column connection. The basic design idea is: through the weakening of the beam end flange, induce the beam The end plastic hinge section is moved outward from the beam-column connection to avoid the residual stress concentration area at the beam-column connection and improve the energy dissipation performance of the joint.
狗骨式节点在循环荷载作用下的性能以及破坏形式已经研究的比较透彻，试验和理论分析研究都显示其具备比普通钢框架节点更好的耗能能力。但随着荷载和循环次数的增加，梁端翼缘削弱部位受压特别是受压屈服后及对应腹板受压和受剪时可能产生钢板平面外的屈曲失稳现象，节点滞回曲线出现一定程度的刚度、强度退化。这种翼缘与腹板可能产生的钢板平面外屈曲失稳，轻则影响节点耗能能力的发挥，减少翼缘削弱部位的低周疲劳寿命，重则导致节点提前破坏。也有的试验表明，由于狗骨式节点削弱了节点区的翼缘截面，导致钢梁平面外刚度降低，容易产生钢梁平面外整体屈曲。The performance and failure mode of dog-bone joints under cyclic loads have been thoroughly studied. Experimental and theoretical analysis studies have shown that they have better energy dissipation capacity than ordinary steel frame joints. However, with the increase of the load and the number of cycles, the buckling instability of the steel plate outside the plane may occur when the weakened part of the beam end flange is under compression, especially after the compression yields and the corresponding web is under compression and shear, and the node hysteresis curve appears to a certain extent stiffness and strength degradation. The out-of-plane buckling instability of the steel plate that may be produced by the flange and the web may affect the energy dissipation capacity of the node at the slightest, reduce the low cycle fatigue life of the weakened part of the flange, and lead to premature failure of the joint at the worst. Some tests have also shown that the out-of-plane stiffness of the steel beam is reduced because the dog-bone joint weakens the flange section in the joint area, and the out-of-plane overall buckling of the steel beam is easy to occur.
另一方面，屈曲约束支撑BRB是一种通过外部约束部件约束支撑核心板并限制其受压屈曲的轴向受力构件，在强烈地震作用下能充分发挥核心板在循环拉压作用下的滞回性能，达到耗散地震能量的目的。若能通过类似措施限制狗骨式节点梁端上下翼缘削弱部位受压特别是受压屈服后及对应腹板受压和受剪时可能产生的平面外屈曲失稳，并利用约束装置的平面外刚度防止钢梁节点区侧向失稳，将有利于狗骨式节点耗能性能与耗能能力的稳定发挥。On the other hand, the buckling-restrained bracing BRB is an axially stressed member that constrains the core plate and limits its buckling under compression through external restraint components, and can fully exert the hysteresis of the core plate under cyclic tension and compression Back performance, to achieve the purpose of dissipating seismic energy. If similar measures can be used to limit the out-of-plane buckling instability that may occur when the weakened parts of the upper and lower flanges of the dog-bone joint beam end are under compression, especially after the compression yields and the corresponding web is under compression and shear, and the plane of the restraint device is used The external rigidity prevents the lateral instability of the steel beam joint area, which will be beneficial to the stable performance of the energy dissipation performance and energy dissipation capacity of the dog-bone joint.
针对上述问题，本发明提出一种狗骨式节点梁端屈曲约束装置：在狗骨式节点梁端上下翼缘削弱部位外侧设置约束盖板，并在梁端上下翼缘削弱部位对应腹板两侧设置约束槽钢，约束盖板与约束槽钢之间设置填充板，通过连接螺栓将约束盖板、约束槽钢与填充板连接组成完整的约束装置。该约束装置可有效限制梁端上下翼缘削弱部位受压特别是受压屈服后和对应腹板受压和受剪时钢板平面外可能发生的大幅值屈曲失稳，防止可能产生的翼缘削弱部位疲劳寿命降低及节点刚度、强度退化，防止节点区钢梁发生平面外整体屈曲，保证滞回曲线饱满，提高了节点变形能力、延性及梁的侧向稳定性，充分发挥狗骨式节点优良的耗能性能。In view of the above problems, the present invention proposes a dog-bone joint beam end buckling restraint device: a restraint cover plate is set outside the weakened part of the upper and lower flanges of the dog-bone joint beam end, and the weakened parts of the upper and lower flanges of the beam end correspond to the two webs. Constraint channel steel is arranged on the side, a filler plate is set between the restraint cover plate and the restraint channel steel, and the restraint cover plate, restraint channel steel and filler plate are connected by connecting bolts to form a complete restraint device. The restraint device can effectively limit the large value buckling instability that may occur outside the plane of the steel plate when the weakened parts of the upper and lower flanges of the beam end are under compression, especially after the compression yields and the corresponding web is under compression and shear, and prevent possible flange weakening Reduce fatigue life of parts and degrade joint stiffness and strength, prevent out-of-plane overall buckling of steel beams in the joint area, ensure full hysteretic curves, improve joint deformation capacity, ductility and lateral stability of beams, and give full play to the excellent dog-bone joints energy consumption performance.
发明内容Contents of the invention
技术问题，本发明的目的是提供一种应用于钢结构狗骨式节点梁端的屈曲约束装置，以有效限制梁端上下翼缘削弱部位受压特别是受压屈服后和对应腹板受压和受剪时在钢板平面外可能发生的大幅值屈曲失稳，防止可能产生的翼缘削弱部位疲劳寿命降低及节点刚度、强度退化，防止节点区钢梁发生平面外整体屈曲，保证滞回曲线饱满，提高了节点变形能力、延性及梁的侧向稳定性，充分发挥狗骨式节点优良的耗能性能。Technical problem, the purpose of the present invention is to provide a buckling restraint device applied to the beam end of the dog-bone joint of the steel structure, so as to effectively limit the compression of the weakened parts of the upper and lower flanges of the beam end, especially after the compression yields and the corresponding web compression and Large buckling instability that may occur outside the plane of the steel plate during shearing prevents possible fatigue life reduction of flange weakened parts and joint stiffness and strength degradation, prevents overall out-of-plane buckling of steel beams in the joint area, and ensures full hysteresis curves , improve the joint deformation capacity, ductility and lateral stability of the beam, and give full play to the excellent energy dissipation performance of the dog-bone joint.
技术方案：本发明采用的一种狗骨式节点梁端屈曲约束装置的技术方案为：Technical solution: The technical solution of a dog-bone joint beam end buckling restraint device adopted in the present invention is:
所述狗骨式节点梁端屈曲约束装置包括设置于狗骨式节点梁端上下翼缘削弱部位外侧的约束盖板、翼缘削弱部位对应腹板两侧的约束槽钢、约束盖板与约束槽钢之间的填充板及将所述约束盖板、约束槽钢和填充板连接组成完整约束装置的连接螺栓。The dog-bone joint beam end buckling restraint device includes a restraint cover plate arranged outside the weakened part of the upper and lower flanges of the dog-bone joint beam end, restraint channel steel corresponding to both sides of the web at the flange weakened part, restraint cover plate and restraint The filler plate between the channel steels and the connecting bolts connecting the constraint cover plate, the constraint channel steel and the filler plate to form a complete restraint device.
所述的约束盖板、约束槽钢及填充板上开有螺栓孔，便于连接螺栓对齐并穿过。Bolt holes are opened on the restraint cover plate, restraint channel steel and filler plate, so that the connecting bolts can be aligned and passed through.
优选的，所述的约束槽钢内部焊有避开所述螺栓孔位置的加劲肋。Preferably, the restraining channel steel is internally welded with stiffeners avoiding the positions of the bolt holes.
所述的约束盖板与约束槽钢的长度略大于所述狗骨式节点梁端上下翼缘削弱部位的长度。The length of the constraint cover plate and the constraint channel steel is slightly longer than the length of the weakened part of the upper and lower flanges of the dog-bone node beam end.
所述的约束槽钢高度略小于所述狗骨式节点梁端上下翼缘之间的净距离；所述约束槽钢布置于狗骨式节点梁端削弱翼缘和对应腹板之间的空间，其腹板与钢梁腹板相靠。所述的填充板厚度略大于所述狗骨式节点梁端上下翼缘厚度，形状与所述狗骨式节点梁端上下翼缘削弱部位形状一致；所述的填充板与约束槽钢连为一体或与所述的约束盖板连为一体。The height of the restraining channel steel is slightly smaller than the net distance between the upper and lower flanges of the dog-bone joint beam end; the restraining channel steel is arranged in the space between the weakened flange of the dog-bone joint beam end and the corresponding web , its web is close to the web of the steel beam. The thickness of the filling plate is slightly greater than the thickness of the upper and lower flanges of the dog-bone joint beam end, and its shape is consistent with the shape of the weakened part of the upper and lower flanges of the dog-bone joint beam end; the filling plate is connected with the restraining channel steel as Integral or integrated with the constraint cover plate.
所述屈曲约束装置与钢梁的接触面之间存在间隙；优选的，所述间隙中或填有无粘结材料。There is a gap between the contact surface of the buckling restraint device and the steel beam; preferably, the gap may be filled with non-bonding material.
通过上述措施使得当所述狗骨式节点承受弯矩和剪力时，所述约束装置在不直接参与轴向受力的同时，有效防止狗骨式节点梁端翼缘削弱部位受压特别是受压屈服后及对应腹板受压和受剪时在钢板平面外可能发生的大幅值屈曲失稳，并防止节点区钢梁发生侧向失稳。Through the above measures, when the dog-bone joint is subjected to bending moment and shear force, the restraint device can effectively prevent the weakened part of the beam end flange of the dog-bone joint from being compressed, especially under compression, while not directly participating in the axial force. After yielding and when the corresponding web is under compression and shear, the large-value buckling instability that may occur outside the plane of the steel plate is prevented, and the lateral instability of the steel beam in the joint area is prevented.
有益效果：Beneficial effect:
1狗骨式节点梁端屈曲约束装置可有效限制梁端上下翼缘削弱部位受压特别是受压屈服后及对应腹板受压和受剪时在钢板平面外可能发生的大幅值屈曲失稳，防止可能产生的翼缘削弱部位疲劳寿命降低及节点刚度、强度退化，保证滞回曲线饱满，充分发挥狗骨式节点优良的耗能性能。1 The buckling restraint device at the beam end of the dog-bone joint can effectively limit the compression of the weakened parts of the upper and lower flanges of the beam end, especially after the compression yields and the corresponding web is compressed and sheared. , to prevent the fatigue life reduction of the weakened part of the flange and the degradation of joint stiffness and strength, to ensure that the hysteresis curve is full, and to give full play to the excellent energy dissipation performance of the dog-bone joint.
2狗骨式节点梁端屈曲约束装置形式简单、施工安装方便、作用机理明确，能提高节点变形能力、延性及狗骨式节点梁侧向稳定性。2 The dog-bone joint beam end buckling restraint device has simple form, convenient construction and installation, and clear action mechanism, which can improve the joint deformation capacity, ductility and lateral stability of the dog-bone joint beam.
附图说明Description of drawings
图1为本发明的一个可实施例中，狗骨式节点梁端屈曲约束装置在狗骨式节点梁端安装示意图。Fig. 1 is a schematic diagram of installation of a dog-bone joint beam end buckling restraint device on a dog-bone joint beam end in a possible embodiment of the present invention.
图2为本发明的一个可实施例中，狗骨式节点梁端屈曲约束装置在狗骨式节点梁端拆解示意图未绘出连接螺栓与无粘结材料。Fig. 2 is a schematic diagram showing the disassembly of the dog-bone joint beam end buckling restraint device at the dog-bone joint beam end in a possible embodiment of the present invention without drawing the connecting bolts and unbonded materials.
图3为本发明的一个可实施例中，狗骨式节点梁端屈曲约束装置在狗骨式节点梁端的安装剖面图。Fig. 3 is an installation sectional view of the dog-bone joint beam end buckling restraint device at the dog-bone joint beam end in a possible embodiment of the present invention.
图中有：约束盖板1，约束槽钢2，加劲肋21，填充板3，连接螺栓4，螺栓孔5，无粘结材料6，带有狗骨式节点的钢梁7，翼缘削弱部位7-1，钢柱与钢梁的连接面8。In the figure there are: constrained cover plate 1, constrained channel steel 2, stiffener 21, filler plate 3, connecting bolt 4, bolt hole 5, unbonded material 6, steel beam with dog-bone joint 7, flange weakened Part 7-1, connection surface 8 of steel column and steel beam.
具体实施方式detailed description
所述狗骨式节点梁端屈曲约束装置包括设置于带有狗骨式节点的钢梁7端上下翼缘削弱部位7-1外侧的约束盖板1、翼缘削弱部位7-1对应腹板两侧的约束槽钢2、约束盖板1与约束槽钢2之间的填充板3及将所述约束盖板1、约束槽钢2和填充板3连接组成完整约束装置的连接螺栓4，所述的约束盖板1、约束槽钢2及填充板3上开有螺栓孔5，便于连接螺栓4对齐并穿过。The dog-bone joint beam end buckling constraint device includes a restraint cover plate 1 arranged outside the weakened part 7-1 of the upper and lower flanges of the steel beam with a dog-bone joint 7, and a web plate corresponding to the weakened part 7-1 of the flange The restraint channel steel 2 on both sides, the filler plate 3 between the restraint cover plate 1 and the restraint channel steel 2, and the connecting bolt 4 connecting the restraint cover plate 1, the restraint channel steel 2 and the filler plate 3 to form a complete restraint device, Bolt holes 5 are opened on the constraint cover plate 1 , the constraint channel steel 2 and the filling plate 3 , so that the connecting bolts 4 can be aligned and passed through.
所述的约束槽钢2内部焊有避开所述螺栓孔5位置的加劲肋21。Stiffeners 21 that avoid the positions of the bolt holes 5 are welded inside the restraining channel steel 2 .
所述的约束盖板1与约束槽钢2的长度略大于所述狗骨式节点梁端上下翼缘削弱部位7-1的长度。The lengths of the constrained cover plate 1 and the constrained channel steel 2 are slightly longer than the length of the weakened parts 7-1 of the upper and lower flanges at the end of the dog-bone node beam.
所述的约束槽钢2高度略小于所述狗骨式节点梁端上下翼缘之间的净距离；所述约束槽钢2布置于狗骨式节点梁端削弱部位翼缘和对应腹板之间的空间，其腹板与钢梁腹板相靠。The height of the restraining channel steel 2 is slightly smaller than the net distance between the upper and lower flanges of the dog-bone joint beam end; the restraining channel steel 2 is arranged between the flange of the weakened part of the dog-bone joint beam end and the corresponding web The space between, its web and steel girder web close to each other.
所述的填充板3厚度略大于所述狗骨式节点梁端上下翼缘厚度，形状与所述狗骨式节点梁端上下翼缘削弱部位7-1形状互补；所述的填充板3或可与所述的约束盖板1连为一体。The thickness of the filling plate 3 is slightly greater than the thickness of the upper and lower flanges of the dog-bone joint beam end, and its shape is complementary to that of the weakened part 7-1 of the upper and lower flanges of the dog-bone joint beam end; the filling plate 3 or It can be integrated with the constraining cover plate 1 described above.
所述屈曲约束装置与钢梁的接触面之间存在间隙。There is a gap between the buckling restraint and the contact surface of the steel beam.
所述间隙中或填有无粘结材料6。The gap may be filled with non-adhesive material 6 .
下面以本发明的一个可实施例为例，说明本发明的具体实施方式。The specific implementation manner of the present invention will be described below by taking a possible embodiment of the present invention as an example.
本发明所提出的用于钢结构狗骨式节点梁端的屈曲约束装置，将安装在梁端翼缘削弱部位。The buckling restraint device proposed by the invention for the beam end of a dog-bone joint of a steel structure will be installed at the weakened part of the flange of the beam end.
1屈曲约束装置加工1 Buckling restraint device processing
根据狗骨式节点梁端削弱部位尺寸、翼缘宽度、翼缘厚度及上下翼缘之间的净距，选取并加工相应尺寸的约束盖板1、约束槽钢2、填充板3及连接螺栓4，在约束盖板1、约束槽钢2及填充板3上开螺栓孔5，在约束槽钢2内部避让螺栓孔5位置焊接加劲肋21。According to the size of the weakened part of the beam end of the dog-bone joint, the width of the flange, the thickness of the flange and the clear distance between the upper and lower flanges, select and process the restraint cover plate 1, restraint channel steel 2, filler plate 3 and connecting bolts of corresponding size 4. Open the bolt holes 5 on the restraint cover plate 1, the restraint channel steel 2 and the filler plate 3, and weld the stiffener 21 inside the restraint channel steel 2 to avoid the position of the bolt hole 5.
2屈曲约束装置安装2 Buckling restraint installation
将约束盖板1、约束槽钢2及填充板3三者与钢梁的接触面涂上无粘结材料6，在狗骨式节点梁端翼缘削弱部位7-1周围通过连接螺栓4组合成为完整约束装置，包围削弱翼缘及对应腹板。Coat the contact surfaces of restraint cover plate 1, restraint channel steel 2 and filler plate 3 with the steel beam with non-adhesive material 6, and combine them with connecting bolts 4 around the weakened part 7-1 of the dog-bone node beam end flange to form a complete Constraints enclosing the weakened flange and corresponding web.
3梁柱安装3 Beam and column installation
在现场进行常规的钢结构梁柱安装。Routine beam and column installation of steel structure is carried out on site.
梁柱安装过程也可先于屈曲约束装置安装过程进行。The beam-column installation process can also be performed prior to the buckling restraint installation process.
以上实施例是参照附图，对本发明的优选实施例进行详细说明，本领域的技术人员通过对上述实施例进行各种形式上的修改或变更，但不背离本发明的实质的情况下，都落在本发明的保护范围。The above embodiments are detailed descriptions of the preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the essence of the present invention. Fall within the protection scope of the present invention.
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