CN207348220U - Active constraint formula cast in place frame bean column node system based on retarded adhesive prestressed technology - Google Patents
Active constraint formula cast in place frame bean column node system based on retarded adhesive prestressed technology Download PDFInfo
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- 235000010627 Phaseolus vulgaris Nutrition 0.000 title 1
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Abstract
本实用新型提供一种基于缓粘结预应力技术的主动约束式现浇框架梁柱节点体系，属于土木及结构工程领域。该体系包括现浇框架梁柱节点、缓粘结预应力筋和楔形锚具；所述的现浇框架梁柱节点为十字形结构，包括左侧现浇混凝土梁、右侧现浇混凝土梁、上侧现浇混凝土柱、下侧现浇混凝土柱和节点核心区，楔形锚具布置在柱与梁端的连接部位，其直角边分别与梁、柱的表面吻合。缓粘结预应力筋呈弧形埋置在现浇结构内部，两端分别与相邻梁柱节点角部的楔形锚具连接。现浇框架梁柱节点周围的缓粘结预应力筋张拉后，通过楔形锚具对现浇框架梁柱节点提供X形的主动约束。本实用新型提高了节点的抗震性能，减小了框架结构的侧向位移，使体系更加方便施工。
The utility model provides an active constraint type cast-in-place frame beam-column joint system based on slow bonding prestressing technology, which belongs to the field of civil engineering and structural engineering. The system includes cast-in-place frame beam-column joints, slow bonded prestressed tendons and wedge-shaped anchors; the cast-in-place frame beam-column joints are cross-shaped structures, including left-side cast-in-place concrete beams, right-side cast-in-place concrete beams, The upper side cast-in-place concrete column, the lower side cast-in-place concrete column and the joint core area, the wedge-shaped anchorage is arranged at the connection part of the column and the beam end, and its right-angled sides coincide with the surface of the beam and column respectively. Slowly bonded prestressed tendons are embedded in the cast-in-place structure in an arc shape, and both ends are respectively connected with wedge-shaped anchors at the corners of adjacent beam-column joints. After the slow-bonded prestressed tendons around the beam-column joints of the cast-in-place frame are stretched, an X-shaped active constraint is provided to the beam-column joints of the cast-in-place frame through wedge-shaped anchors. The utility model improves the anti-seismic performance of the nodes, reduces the lateral displacement of the frame structure, and makes the construction of the system more convenient.
Description
技术领域technical field
本实用新型属于土木及结构工程领域，涉及一种主动约束式现浇框架梁柱节点体系，该体系中主动约束主要通过缓粘结预应力技术实现。The utility model belongs to the field of civil engineering and structural engineering, and relates to an active restraint type cast-in-place frame beam-column joint system, in which the active restraint is mainly realized through slow bond prestressing technology.
背景技术Background technique
梁柱节点是钢筋混凝土现浇框架结构体系中的关键构件。在地震或风等横向荷载作用下，节点将传递梁和柱子之间的弯矩和剪力，并允许梁端出现塑性铰消耗能量，从而保护主体结构在较大侧向位移下不发生倒塌。因此，梁柱节点需要具有很强的抗剪切承载力，防止其先于梁端发生剪切破坏。目前，常规的梁柱节点设计及施工主要存在两方面问题：首先，梁柱节点区域的混凝土在反复荷载作用下，会沿主拉应力方向开裂，从而导致节点的滞回性能下降，表现为刚度的持续退化。因此，混凝土对于梁柱节点的抗剪性能的贡献很小；其次，梁柱节点区域的抗剪切承载力是通过构造措施来实现的，这就导致在梁柱节点区域会布置大量的钢筋，用来提高节点核心区的抗剪性能。同时，为了保证塑性铰的转动能力，梁端或柱端的钢筋都会穿过节点区域并锚固，导致节点区域钢筋更加集中，不利于施工。在此背景下，亟待提出一种具有良好的抗剪切性能，且便于施工的现浇框架梁柱节点体系。Beam-column joints are key components in reinforced concrete cast-in-place frame structures. Under the action of lateral loads such as earthquake or wind, the joints will transmit the bending moment and shear force between the beam and the column, and allow the plastic hinge at the end of the beam to consume energy, so as to protect the main structure from collapsing under large lateral displacement. Therefore, the beam-column joint needs to have a strong shear bearing capacity to prevent it from shear failure before the beam end. At present, there are two main problems in the design and construction of conventional beam-column joints: first, under repeated loads, the concrete in the beam-column joint area will crack along the direction of the main tensile stress, resulting in a decrease in the hysteretic performance of the joint, which is manifested as stiffness continued degradation. Therefore, the contribution of concrete to the shear performance of beam-column joints is very small; secondly, the shear capacity of the beam-column joint area is realized through construction measures, which leads to the arrangement of a large number of steel bars in the beam-column joint area, It is used to improve the shear performance of the core area of the joint. At the same time, in order to ensure the rotation capacity of the plastic hinge, the steel bars at the beam end or column end will pass through the joint area and be anchored, resulting in more concentrated steel bars in the joint area, which is not conducive to construction. In this context, it is urgent to propose a cast-in-place frame beam-column joint system that has good shear resistance and is easy to construct.
实用新型内容Utility model content
本实用新型旨在提供一种基于缓粘结预应力技术的主动约束式梁柱节点体系，适用于现浇混凝土框架结构。其特点是具有更好的抗震性能，且施工操作方便。The utility model aims to provide an active restraint beam-column joint system based on slow bonding prestressing technology, which is suitable for cast-in-place concrete frame structures. It is characterized by better seismic performance and convenient construction and operation.
本实用新型的技术方案为：The technical scheme of the utility model is:
一种基于缓粘结预应力技术的主动约束式现浇框架梁柱节点体系，包括现浇框架梁柱节点、缓粘结预应力筋和楔形锚具。所述的现浇框架梁柱节点为十字形结构，包括左侧现浇混凝土梁、右侧现浇混凝土梁、上侧现浇混凝土柱、下侧现浇混凝土柱和节点核心区，十字形结构中心部分为节点核心区。An actively restrained cast-in-place frame beam-column joint system based on slow-bonded prestressing technology, including cast-in-place frame beam-column joints, slow-bonded prestressed tendons and wedge anchors. The cast-in-place frame beam-column joint is a cross-shaped structure, including a left-side cast-in-place concrete beam, a right-side cast-in-place concrete beam, an upper side cast-in-place concrete column, a lower side cast-in-place concrete column and a node core area, and the cross-shaped structure The central part is the node core area.
所述的楔形锚具布置在柱与梁端的连接部位，其直角边分别与梁、柱的表面吻合；从任一现浇框架梁柱节点的左上角开始，沿顺时针方向，楔形锚具分别命名为第一楔形锚具、第二楔形锚具、第三楔形锚具和第四楔形锚具。The wedge-shaped anchors are arranged at the joint between the column and the beam end, and their right-angled sides coincide with the surfaces of the beams and columns respectively; starting from the upper left corner of any cast-in-place frame beam-column node, clockwise, the wedge-shaped anchors are respectively Named first wedge anchor, second wedge anchor, third wedge anchor and fourth wedge anchor.
所述的缓粘结预应力筋呈弧形埋置在现浇框架梁柱节点的内部，两端分别与相邻的现浇框架梁柱节点角部的楔形锚具连接；从任一现浇框架梁柱节点左上角开始，沿顺时针方向，被锚固的缓粘结预应力筋分别命名为第一缓粘结预应力筋、第二缓粘结预应力筋、第三缓粘结预应力筋和第四缓粘结预应力筋。所述的缓粘结预应力筋在现浇框架梁柱节点内通过定位钢筋实现弧形布置，定位钢筋沿梁长度方向均匀固定在梁钢筋架立筋上，通过改变定位钢筋的长度，限制缓粘结预应力筋的弧度。浇筑混凝土前完成缓粘结预应力筋的布置，将缓粘结预应力筋布置在模板中，其中弧形部分通过定位钢筋实现。The slow bonded prestressed tendons are embedded in the interior of the cast-in-place frame beam-column joints in an arc shape, and the two ends are respectively connected with the wedge-shaped anchors at the corners of the adjacent cast-in-place frame beam-column joints; Starting from the upper left corner of the frame beam-column joints, along the clockwise direction, the anchored slow-bonded prestressed tendons are respectively named the first slow-bonded prestressed tendons, the second slow-bonded prestressed tendons, and the third slow-bonded prestressed tendons. tendons and the fourth slow bonded prestressed tendons. The slow-bonded prestressed tendons are arranged in an arc-shaped manner in the beam-column joints of the cast-in-place frame through positioning steel bars, and the positioning steel bars are evenly fixed on the vertical bars of the beam reinforcement frame along the length direction of the beam. By changing the length of the positioning steel bars, the slow The radian of the bonded tendon. Before pouring concrete, the arrangement of slow-bonded prestressed tendons is completed, and the slow-bonded prestressed tendons are arranged in the formwork, and the arc-shaped part is realized by positioning steel bars.
所述的缓粘结预应力筋与楔形锚具的连接方式为：第一缓粘结预应力筋的一端与现浇框架梁柱节点左上角的第一楔形锚具连接，另一端与相邻现浇框架梁柱节点右上角的第二楔形锚具连接；第四缓粘结预应力筋的一端与现浇框架梁柱节点左下角的第四楔形锚具连接，另一端与相邻现浇框架梁柱节点右下角的第三楔形锚具连接。现浇框架梁柱节点周围的缓粘结预应力筋张拉后，通过楔形锚具对现浇框架梁柱节点提供X形的主动约束。The connection mode of the slow bonded prestressed tendons and wedge anchors is as follows: one end of the first slow bonded prestressed tendons is connected with the first wedge anchor at the upper left corner of the cast-in-place frame beam-column joint, and the other end is connected with the adjacent The second wedge-shaped anchor in the upper right corner of the cast-in-place frame beam-column joint is connected; one end of the fourth slow bonded prestressed tendon is connected with the fourth wedge-shaped anchor in the lower left corner of the cast-in-place frame beam-column joint, and the other end is connected with the adjacent cast-in-place The third wedge anchor connection in the lower right corner of the frame beam-to-column joint. After the slow-bonded prestressed tendons around the beam-column joints of the cast-in-place frame are stretched, an X-shaped active constraint is provided to the beam-column joints of the cast-in-place frame through wedge-shaped anchors.
所述的缓粘结预应力筋可替换为缓粘结预应力钢绞线。The slow-bonding prestressed tendons can be replaced by slow-bonding prestressed steel strands.
本实用新型的有益效果：The beneficial effects of the utility model:
(1)本体系提高了节点的抗震性能。在预应力筋或钢绞线提供的主动约束作用下，节点处混凝土处于多轴应力状态，其极限破坏强度和破坏应变都会提高。同时，主动约束也改善了核心区内钢筋的粘结性能，使其在地震等反复荷载作用下的锚固更加可靠。呈X形布置的预应力筋或钢绞线沿对角线方向对节点核心区形成拉结，约束了其变形，使节点具有更好的抗剪切能力。(1) This system improves the seismic performance of the nodes. Under the active restraint provided by prestressed tendons or steel strands, the concrete at the joints is in a state of multiaxial stress, and its ultimate failure strength and failure strain will both increase. At the same time, the active restraint also improves the bonding performance of the steel bars in the core area, making its anchorage more reliable under repeated loads such as earthquakes. The prestressed tendons or steel strands arranged in an X shape form a tie to the core area of the node along the diagonal direction, constraining its deformation and making the node have better shear resistance.
(2)本体系减小了框架结构的侧向位移。由于预应力筋的存在，梁端混凝土的开裂被延迟，在小震等情况下梁端保持弹性，大震情况下预应力筋会提供额外的恢复力，从而将框架整体侧向位移减小。(2) This system reduces the lateral displacement of the frame structure. Due to the presence of prestressed tendons, the cracking of the concrete at the beam ends is delayed, and the beam ends remain elastic under small earthquakes, etc., and the prestressed tendons will provide additional restoring force under large earthquakes, thereby reducing the overall lateral displacement of the frame.
(3)本体系更加方便施工。通过施加主动约束，梁柱节点的抗剪切性能得到提高。因此，可以进一步减少核心区箍筋的配置，从而使施工作业更加便捷。由于本实用新型使用了缓粘结预应力筋，省去了预留孔道，埋置波纹管等工序，并不增加额外的施工负担。(3) This system is more convenient for construction. By imposing active restraints, the shear performance of beam-column joints is improved. Therefore, the configuration of stirrups in the core area can be further reduced, thereby making the construction work more convenient. Because the utility model uses slow-bonded prestressed tendons, the processes of reserving holes and embedding corrugated pipes are omitted, and additional construction burdens are not added.
附图说明Description of drawings
图1本实用新型框架梁柱节点体系的侧视图。Fig. 1 is a side view of the frame beam-column joint system of the utility model.
图2本实用新型框架梁柱节点体系的剖视图。Fig. 2 is a sectional view of the frame beam-column joint system of the utility model.
图3本实用新型框架梁柱节点体系的模板施工示意图。Fig. 3 is a schematic diagram of formwork construction of the frame beam-column joint system of the present invention.
图中：1现浇框架梁柱节点；2缓粘结预应力筋；3楔形锚具；4左侧现浇混凝土梁；5右侧现浇混凝土梁；6上侧现浇混凝土柱；7下侧现浇混凝土柱；8节点核心区；9模板；10定位钢筋；In the figure: 1 cast-in-place frame beam-column joint; 2 slow bonded prestressed tendons; 3 wedge anchor; 4 left cast-in-place concrete beam; 5 right cast-in-place concrete beam; 6 upper cast-in-place concrete column; 7 lower Side cast-in-place concrete column; 8-node core area; 9 formwork; 10 positioning reinforcement;
2a第一缓粘结预应力筋；2b第二缓粘结预应力筋；2c第三缓粘结预应力筋；2d 第四缓粘结预应力筋；3a第一楔形锚具；3b第二楔形锚具；3c第三楔形锚具；3d 第四楔形锚具。2a the first slow bonded prestressed tendon; 2b the second slow bonded prestressed tendon; 2c the third slow bonded prestressed tendon; 2d the fourth slow bonded prestressed tendon; 3a the first wedge anchor; 3b the second Wedge anchorage; 3c third wedge anchorage; 3d fourth wedge anchorage.
具体实施方式Detailed ways
以下结合附图和技术方案，进一步说明本实用新型的具体实施方法。Below in conjunction with accompanying drawing and technical scheme, further illustrate the specific implementation method of the utility model.
一种基于缓粘结预应力技术的主动约束式现浇框架梁柱节点体系，包括现浇框架梁柱节点1、缓粘结预应力筋2和楔形锚具3。所述的现浇框架梁柱节点1为十字形结构，包括左侧现浇混凝土梁4、右侧现浇混凝土梁5、上侧现浇混凝土柱6、下侧现浇混凝土柱7和节点核心区8，十字形结构中心部分为节点核心区8。An active restraint cast-in-place frame beam-column joint system based on slow-bonded prestressing technology, including cast-in-place frame beam-column joints 1, slow-bonded prestressed tendons 2 and wedge anchors 3. The cast-in-place frame beam-column node 1 is a cross-shaped structure, including the left cast-in-place concrete beam 4, the right cast-in-place concrete beam 5, the upper side cast-in-place concrete column 6, the lower side cast-in-place concrete column 7 and the node core Zone 8, the central part of the cross-shaped structure is the node core zone 8.
所述的楔形锚具3布置在柱与梁端的连接部位，其直角边分别与梁、柱的表面吻合。所述的缓粘结预应力筋2呈弧形埋置在现浇框架梁柱节点1的内部，两端分别与相邻的现浇框架梁柱节点1角部的楔形锚具3连接。所述的缓粘结预应力筋2 与楔形锚具3的连接方式为：第一缓粘结预应力筋2a的一端与现浇框架梁柱节点左上角的第一楔形锚具3a连接，另一端与相邻现浇框架梁柱节点右上角的第二楔形锚具3b连接；第四缓粘结预应力筋2d的一端与现浇框架梁柱节点左下角的第四楔形锚具3d连接，另一端与相邻现浇框架梁柱节点右下角的第三楔形锚具3c连接。现浇框架梁柱节点1周围的缓粘结预应力筋2张拉后，通过楔形锚具3对现浇框架梁柱节点提供X形的主动约束。The wedge-shaped anchorage 3 is arranged at the joint between the column and the beam end, and its right-angled sides coincide with the surfaces of the beam and the column respectively. The slow bonded prestressed tendons 2 are embedded in the interior of the cast-in-place frame beam-column joint 1 in an arc shape, and the two ends are respectively connected with the wedge-shaped anchors 3 at the corners of the adjacent cast-in-place frame beam-column joint 1 . The connection mode of the described slow bonding prestressed tendon 2 and wedge anchor 3 is: one end of the first slow bonded prestressed tendon 2a is connected with the first wedge anchor 3a at the upper left corner of the cast-in-place frame beam-column node, and the other One end is connected with the second wedge-shaped anchorage 3b at the upper right corner of the adjacent cast-in-place frame beam-column joint; one end of the fourth slow bonded prestressed tendon 2d is connected with the fourth wedge-shaped anchorage 3d at the lower left corner of the cast-in-place frame beam-column joint, The other end is connected with the third wedge-shaped anchor 3c at the lower right corner of the adjacent cast-in-place frame beam-column node. After the slow bonded prestressed tendons 2 around the beam-column joints 1 of the cast-in-place frame are stretched, the wedge-shaped anchor 3 provides active restraint in an X shape to the beam-column joints of the cast-in-place frame.
上述基于缓粘结预应力技术的主动约束式现浇框架梁柱节点体系的制备方法如下：The preparation method of the above-mentioned active restraint cast-in-place frame beam-column joint system based on slow bonding prestressing technology is as follows:
(1)布设缓粘结预应力筋2。浇筑混凝土前完成缓粘结预应力筋2的布置，即在绑扎梁、柱钢筋时，将缓粘结预应力筋2按照图3所示布置在模板9中，其中弧形弯曲部分通过定位钢筋10实现。定位钢筋10沿梁长度方向均匀绑扎在梁钢筋架立筋11上，通过改变定位钢筋10的长度，限制缓粘结预应力筋2的弯曲形状。预应力筋应保留足够长度伸出梁柱钢筋骨架。(1) Delayed bonded prestressed tendons 2 are laid out. Complete the arrangement of slow bonded prestressed tendons 2 before pouring concrete, that is, when binding beams and column steel bars, arrange slow bonded prestressed tendons 2 in the formwork 9 as shown in Figure 3, wherein the arc-shaped curved part passes through the positioning steel bars 10 achieved. The positioning reinforcement bars 10 are uniformly bound on the vertical bars 11 of the beam reinforcement frame along the length direction of the beam, and by changing the length of the positioning reinforcement bars 10, the bending shape of the slow bonded prestressing tendons 2 is limited. The prestressed tendon should retain sufficient length to protrude from the beam-column reinforcement skeleton.
(2)浇筑混凝土。按照规程浇筑梁和底层柱的混凝土，并养护至满足张拉预应力筋的条件。(2) Pouring concrete. Concrete for beams and bottom columns shall be poured according to regulations, and cured to meet the conditions of tensioning prestressed tendons.
(3)放置楔形锚具3，并张拉预应力筋。将楔形锚具3放置于图1所示现浇框架梁柱节点1的角部，张拉缓粘结预应力筋2直到满足设计要求预应力张拉值。最后将缓粘结预应力筋2锚固在楔形锚具3上。(3) Place the wedge anchor 3 and stretch the prestressed tendon. Place the wedge-shaped anchor 3 at the corner of the beam-column joint 1 of the cast-in-place frame shown in FIG. 1 , and stretch and slowly bond the prestressed tendons 2 until the prestress tension value meets the design requirements. Finally, the slow bonded prestressed tendon 2 is anchored on the wedge anchor 3 .
以上所述仅是本实用新型的优选实施方式，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，还可作出若干改进和润饰，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, and 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, and these improvements and modifications should also be considered It is the protection scope of the utility model.
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| CN201721433874.1U CN207348220U (en) | 2017-11-01 | 2017-11-01 | Active constraint formula cast in place frame bean column node system based on retarded adhesive prestressed technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795012A (en) * | 2017-11-01 | 2018-03-13 | 大连理工大学 | Active constraint formula cast in place frame bean column node system based on retarded adhesive prestressed technology |
| CN111364625A (en) * | 2020-04-16 | 2020-07-03 | 张峻华 | Crossbeam restraint device for safety storehouse of moving away to avoid possible earthquakes convenient to installation |
-
2017
- 2017-11-01 CN CN201721433874.1U patent/CN207348220U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795012A (en) * | 2017-11-01 | 2018-03-13 | 大连理工大学 | Active constraint formula cast in place frame bean column node system based on retarded adhesive prestressed technology |
| CN111364625A (en) * | 2020-04-16 | 2020-07-03 | 张峻华 | Crossbeam restraint device for safety storehouse of moving away to avoid possible earthquakes convenient to installation |
| CN111364625B (en) * | 2020-04-16 | 2021-05-04 | 张峻华 | Crossbeam restraint device for safety storehouse of moving away to avoid possible earthquakes convenient to installation |
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