技术领域technical field
本发明涉及一种不同柱截面节点恒定轴力自平衡加载装置，属于混凝土建筑领域。The invention relates to a constant axial force self-balancing loading device for nodes with different column sections, which belongs to the field of concrete buildings.
背景技术Background technique
土木工程领域中，研究梁柱节点的滞回性能非常重要。在含有梁柱节点的结构中，节点往往是薄弱环节，其滞回性能的好坏对整个结构抗震性能有很大影响，准确测量节点的滞回性能对评价梁柱节点的延性、变形能力以及耗能能力具有重要意义。In the field of civil engineering, it is very important to study the hysteretic behavior of beam-column joints. In structures containing beam-column joints, the joints are often weak links, and their hysteretic properties have a great influence on the seismic performance of the entire structure. Accurately measuring the hysteretic properties of joints is crucial for evaluating the ductility, deformation capacity and Energy consumption capacity is of great significance.
目前在研究梁柱节点的滞回性能主要采用拟静力试验，柱端通过千斤顶施加恒定轴向压力，在梁端采用液压千斤顶施加低周往复竖向荷载，竖向荷载反力和水平荷载反力分别通过竖向荷载反力架和水平荷载反力架，在竖向和水平向分别达到自平衡，未能在两个方向同时达到自平衡。通过液压千斤顶施加的往复荷载的加载频率和连续性得不到有效控制，另一方面通过千斤顶施加竖向力，由于随着节点在竖向荷载的作用下发生侧移，千斤顶由于回油使施加的竖向力不能保持恒定，而产生较大试验误差。At present, the quasi-static test is mainly used to study the hysteretic performance of beam-column joints. A constant axial pressure is applied to the column end through a jack, and a low-cycle reciprocating vertical load is applied to the beam end using a hydraulic jack. The vertical load reaction force and the horizontal load reaction force The force passes through the vertical load reaction frame and the horizontal load reaction frame respectively, and achieves self-balancing in the vertical and horizontal directions respectively, but fails to achieve self-balancing in both directions at the same time. The loading frequency and continuity of the reciprocating load applied by the hydraulic jack cannot be effectively controlled. The vertical force cannot be kept constant, resulting in large experimental errors.
发明内容Contents of the invention
本发明要解决的技术问题是针对研究梁柱节点的滞回性能，在梁端采用液压千斤顶施加低周往复竖向荷载，未能在两个方向同时达到自平衡的问题，而提供一种不同柱截面节点恒定轴力自平衡加载装置。The technical problem to be solved in the present invention is to study the hysteretic performance of beam-column joints, and to apply a low-cycle reciprocating vertical load at the end of the beam with a hydraulic jack, which fails to achieve self-balancing in two directions at the same time, and to provide a different Constant axial force self-balancing loading device for column section nodes.
为了解决上述技术问题，本发明采用以下技术方案。一种不同柱截面节点恒定轴力自平衡加载装置，包含底梁、底部球铰、下反力板、上反力板、上端铰支座、液压千斤顶、下夹持结构、上夹持结构、梁柱节点试件、调节螺栓、钢夹板、反力拉杆，底部球铰一端固定安装在底梁上，另一端与下反力板相连，下夹持结构与下反力板相连，上端铰支座一端与上反力板相连，另一端与液压千斤顶相连，液压千斤顶与上夹持结构相连，梁柱节点试件被下夹持结构和上夹持结构夹持，下反力板和上反力板通过反力拉杆相连接，下夹持结构和上夹持结构的四周分别安装有调节螺栓，夹持结构与梁柱节点试件之间的四周都安装有钢夹板。In order to solve the above technical problems, the present invention adopts the following technical solutions. A constant axial force self-balancing loading device for nodes with different column sections, including a bottom beam, a bottom spherical hinge, a lower reaction plate, an upper reaction plate, an upper hinge support, a hydraulic jack, a lower clamping structure, an upper clamping structure, Beam-column joint specimens, adjusting bolts, steel splints, reaction pull rods, one end of the bottom spherical hinge is fixed on the bottom beam, the other end is connected with the lower reaction plate, the lower clamping structure is connected with the lower reaction plate, and the upper end is hinged. One end of the seat is connected with the upper reaction plate, the other end is connected with the hydraulic jack, and the hydraulic jack is connected with the upper clamping structure. The beam-column joint specimen is clamped by the lower clamping structure and the upper clamping structure. The force plates are connected by counter force rods, adjusting bolts are installed around the lower clamping structure and the upper clamping structure, and steel splints are installed around the clamping structure and the beam-column joint specimen.
有益效果。Beneficial effect.
1、本发明测试装置在加载过程中，节点柱的底部和顶部均设置活动角支座，并通过螺杆将两部分连接起来，防止节点变形过程中轴力发生变化，使得节点在反复荷载变形下竖向轴力仍保持恒定。1. During the loading process of the test device of the present invention, the bottom and top of the node column are provided with movable angular supports, and the two parts are connected by a screw to prevent the axial force from changing during the node deformation process, so that the node is deformed under repeated loads. The vertical axial force remains constant.
2、本发明装置比较简单方便，所需材料少，只要进行局部拆卸和组装，操作方便，适用于不同柱截面的梁柱节点在低周反复荷载下滞回性能的测试试验。2. The device of the present invention is relatively simple and convenient, requires few materials, only needs to be partially disassembled and assembled, and is easy to operate, and is suitable for testing the hysteresis performance of beam-column joints with different column sections under low-cycle repeated loads.
3、本发明装置通过调节夹持结构四周的调节螺栓，能适用于一定范围内不同尺寸的梁柱节点试件，避免在实验过程中由于更换夹持结构而造成进度拖延，适用性较强，同时可以有效地避免梁柱节点试件在实验过程中出现偏心加载。3. The device of the present invention can be applied to beam-column joint specimens of different sizes within a certain range by adjusting the adjusting bolts around the clamping structure, so as to avoid the progress delay caused by changing the clamping structure during the experiment, and has strong applicability. At the same time, it can effectively avoid the eccentric loading of the beam-column joint specimen during the experiment.
4、本发明装置通过使用刚夹板来控制梁柱节点试件，可以实现对梁柱节点试件的有效夹持。4. The device of the present invention can effectively clamp the beam-column joint test piece by using the rigid splint to control the beam-column joint test piece.
附图说明Description of drawings
图1是本发明测试装置的整体示意图。Fig. 1 is the overall schematic diagram of the testing device of the present invention.
图2是本发明测试装置的夹持结构示意图图。Fig. 2 is a schematic diagram of the clamping structure of the testing device of the present invention.
附图标记如下：1、底梁； 2、底部球铰；3、下反力板；4、上反力板；5、上端铰支座；6、液压千斤顶；7、下夹持结构；8、上夹持结构；9、梁柱节点试件；10、调节螺栓；11、钢夹板；12、反力拉杆；13、高强螺栓。Reference signs are as follows: 1. Bottom beam; 2. Bottom spherical hinge; 3. Lower reaction plate; 4. Upper reaction plate; 5. Upper hinge support; 6. Hydraulic jack; 7. Lower clamping structure; 8 1. Upper clamping structure; 9. Beam-column joint specimen; 10. Adjusting bolt; 11. Steel splint; 12. Reaction rod; 13. High-strength bolt.
具体实施方式Detailed ways
为叙述方便，下文中所称的“左”“右”“上”“下”与附图本身的左、右、上、下方向一致，但并不对本发明的结构起限定作用。For the convenience of description, the "left", "right", "upper" and "lower" referred to below are consistent with the left, right, up and down directions of the drawings themselves, but do not limit the structure of the present invention.
下面结合附图与具体实施方式对本发明作进一步详细地说明。The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
如图1、2所示：一种不同柱截面节点恒定轴力自平衡加载装置，底梁1的两边通过地锚螺栓与地面固定连接，底部球铰2调整好角度放在底梁上，用高强螺栓固定。用高强螺栓将下反力板3与底部球铰2固定连接。下夹持结构7通过螺栓固定安装在下反力板3上。下夹持结构7和上夹持结构8为框形，夹持结构的四周各安装有二颗调节螺栓10。把梁柱节点试件9放进下夹持结构7内，在梁柱节点试件9与下夹持结构7之间的四周各放入一块钢夹板11，通过调节四周的调节螺栓10，把梁柱节点试件9固定在下夹持结构7内。将上夹持结构8盖在梁柱节点试件9的顶部，在梁柱节点试件9与上夹持结构8之间的四周放上钢夹板11，通过调节调节螺栓10来调节上夹持结构8与梁柱节点试件9的间隙，把梁柱节点试件9与上夹持结构8固定连接在一起。通过调节调节螺栓10可以使梁柱节点试件9的轴线与加载力的方向一致。将液压千斤顶6放于上夹持结构8上，液压千斤顶6通过高强螺栓13与上夹持结构8固定相连，液压千斤顶6的另一端与上端铰支座5固定相连。上端铰支座5通过高强螺栓与上反力板4固定相连。上反力板4和下反力板3的四周开有相对应的均匀分布的通孔，四根反力拉杆12的二端都有螺纹，反力拉杆12也可以是螺纹杆，反力拉杆12通过螺母使上反力板4和下反力板3连接在一起，并可以通过调节螺母把梁柱节点试件9的初始轴力调节到设定值P。As shown in Figures 1 and 2: a constant axial force self-balancing loading device for nodes with different column sections. The two sides of the bottom beam 1 are fixedly connected to the ground through ground anchor bolts. High-strength bolts are fixed. The lower reaction force plate 3 is fixedly connected with the bottom spherical hinge 2 with high-strength bolts. The lower clamping structure 7 is fixedly installed on the lower reaction plate 3 by bolts. The lower clamping structure 7 and the upper clamping structure 8 are frame-shaped, and two adjusting bolts 10 are respectively installed around the clamping structure. Put the beam-column joint test piece 9 into the lower clamping structure 7, put a piece of steel splint 11 in the surroundings between the beam-column joint test piece 9 and the lower clamping structure 7, and adjust the adjusting bolts 10 around the The beam-column joint specimen 9 is fixed in the lower clamping structure 7 . Cover the upper clamping structure 8 on the top of the beam-column joint test piece 9, place steel splints 11 around the beam-column joint test piece 9 and the upper clamping structure 8, and adjust the upper clamping by adjusting the adjusting bolt 10 The gap between the structure 8 and the beam-column joint specimen 9 fixedly connects the beam-column joint specimen 9 with the upper clamping structure 8 . By adjusting the adjusting bolt 10, the axis of the beam-column joint test piece 9 can be consistent with the direction of the loading force. Put the hydraulic jack 6 on the upper clamping structure 8, the hydraulic jack 6 is fixedly connected with the upper clamping structure 8 through high-strength bolts 13, and the other end of the hydraulic jack 6 is fixedly connected with the upper hinge support 5. The upper hinge support 5 is fixedly connected with the upper reaction force plate 4 through high-strength bolts. There are corresponding evenly distributed through holes around the upper reaction force plate 4 and the lower reaction force plate 3, and the two ends of the four reaction force pull rods 12 are threaded, and the reaction force pull rods 12 can also be threaded rods. 12 Connect the upper reaction force plate 4 and the lower reaction force plate 3 together through nuts, and adjust the initial axial force of the beam-column joint test piece 9 to the set value P by adjusting the nuts.
| Application Number | Priority Date | Filing Date | Title |
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| CN201310091007.4ACN103207121B (en) | 2013-03-21 | 2013-03-21 | The force self-balanced charger of a kind of different column section node constant shaft |
| Application Number | Priority Date | Filing Date | Title |
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| CN201310091007.4ACN103207121B (en) | 2013-03-21 | 2013-03-21 | The force self-balanced charger of a kind of different column section node constant shaft |
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| CN103207121A CN103207121A (en) | 2013-07-17 |
| CN103207121Btrue CN103207121B (en) | 2015-10-21 |
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| CN201310091007.4AExpired - Fee RelatedCN103207121B (en) | 2013-03-21 | 2013-03-21 | The force self-balanced charger of a kind of different column section node constant shaft |
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