技术领域technical field
本发明涉及一种测试装置，具体涉及一种自平衡式钢筋与混凝土粘结滑移测试装置及测试方法，属于土木工程钢筋混凝土粘结滑移性能测试技术领域。The invention relates to a test device, in particular to a self-balancing steel bar and concrete bond slip test device and a test method, which belong to the technical field of civil engineering reinforced concrete bond slip performance test.
背景技术Background technique
粘结滑移性能是钢筋混凝土性能测试的最重要的指标之一，它是钢筋与混凝土共同协调工作的基础和前提。只有当钢筋与混凝土之间具有足够的粘结能力，才能使两种材料协同工作。Bond-slip performance is one of the most important indicators of reinforced concrete performance testing, and it is the basis and premise for the coordinated work of steel and concrete. Only when there is sufficient bonding capacity between steel and concrete can the two materials work together.
目前，测试钢筋混凝土粘结滑移性能的方法主要有拉拔试验、梁式试验等，拉拔试验通过采用钢筋开槽贴片，测量试件钢筋加载端、自由端钢筋滑移位移的方法，利用粘结应力—滑移位移(τ-s)曲线来反应试件的粘结滑移性能。然而传统的拉拔试验仍具有一些可能会对试验结果造成影响的不足之处：At present, the methods for testing the bond-slip performance of reinforced concrete mainly include pull-out test, beam test, etc. The pull-out test adopts the grooved patch of steel bar to measure the slip displacement of the steel bar at the loading end and free end of the specimen. The bond-slip performance of the specimen is reflected by the bond stress-slip displacement (τ-s) curve. However, the traditional pull-out test still has some shortcomings that may affect the test results:
(1)、传统的拉拔试验使用万能试验机提供竖直向的拉拔力，对硬件设备要求较高，且难以搬运，试验地点受设备限制大，难以进行现场试验；(1) The traditional pull-out test uses a universal testing machine to provide vertical pull-out force, which requires high hardware equipment and is difficult to transport. The test site is limited by the equipment and it is difficult to conduct on-site tests;
(2)、由于手工浇筑试件的影响，试件钢筋并不是完全垂直于试件混凝土表面，因此在进行拉拔试验时，无法做到对试件钢筋进行完全的垂直拉拔，在一定程度上影响了试验结果的准确性；(2) Due to the influence of manual pouring of the test piece, the steel bar of the test piece is not completely perpendicular to the concrete surface of the test piece. affect the accuracy of test results;
(3)、目前国内外所发明的一些新型的拉拔试验装置存在一定的动力损耗，造成动力设备提供的力无法完全转化成拉拔力，使得采集到的拉拔力也存在一定的误差。(3) There is a certain power loss in some new pull-out test devices invented at home and abroad at present, which causes the power provided by the power equipment to be unable to be completely converted into pull-out force, so that there is also a certain error in the pull-out force collected.
中国专利文献CN105259107A、CN203798715U、CN104122201A公开的钢筋混凝土粘结滑移性能测试装置，皆使用单层框架将试件的混凝土部分进行固定，随后使用万能试验机对试件钢筋实施拉拔，对硬件要求较高，难以转换试验场地进行试验。Chinese patent documents CN105259107A, CN203798715U, and CN104122201A disclose the reinforced concrete bond-slip performance testing devices, all of which use a single-layer frame to fix the concrete part of the specimen, and then use a universal testing machine to pull out the steel bars of the specimen. High, it is difficult to switch the test site for testing.
中国专利文献CN107247020A公开的一种消除高温影响的钢筋混凝土拉拔试验装置，采用上拉拔框架与下拉拔框架分别对混凝土与钢筋实施拉拔。然而此装置虽能降低了试件温度对试验结果的影响，但仍然依赖于万能试验机等大型加载设备。Chinese patent document CN107247020A discloses a reinforced concrete pullout test device that eliminates the influence of high temperature. The upper pullout frame and the lower pullout frame are used to pull concrete and steel bars respectively. However, although this device can reduce the influence of the temperature of the specimen on the test results, it still relies on large loading equipment such as universal testing machines.
中国专利文献CN104833631A公开了一种钢筋混凝土粘结应力及滑移测量装置，其采用了千斤顶作为拉拔试验的动力装置。此装置虽降低了对硬件设备的要求，但其内框架的联动杆穿过外框架的顶板时会造成一定的动力损失；且内框架的联动杆在试验过程中承受压力，考虑到压杆稳定问题，也会影响到试验的精度。Chinese patent document CN104833631A discloses a reinforced concrete bond stress and slip measurement device, which uses a jack as a power device for a pull-out test. Although this device reduces the requirements for hardware equipment, it will cause a certain power loss when the linkage rod of the inner frame passes through the top plate of the outer frame; and the linkage rod of the inner frame is under pressure during the test, considering the stability of the pressure rod Problems can also affect the accuracy of the test.
鉴于上述原因，实有必要设计一种高效、方便的钢筋混凝土拉拔试验装置。In view of the above reasons, it is necessary to design an efficient and convenient reinforced concrete pull-out test device.
发明内容Contents of the invention
为解决现有技术的不足，本发明的目的在于提供一种可利用简易加载装置加载的，可实现钢筋拉拔角度自动调节以保证试件钢筋能受到垂直拉拔力的钢筋混凝土粘结滑移测试装置及测试方法。In order to solve the deficiencies of the prior art, the object of the present invention is to provide a reinforced concrete bond slip that can be loaded by a simple loading device and can automatically adjust the drawing angle of the steel bar to ensure that the steel bar of the test piece can be subjected to the vertical pulling force. Test device and test method.
为了实现上述目标，本发明采用如下的技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
一种自平衡式钢筋与混凝土粘结滑移测试装置，包括固定框架和顶升框架；A self-balancing steel bar-concrete bond-slip test device, including a fixed frame and a jacking frame;
所述固定框架包括通过若干支撑杆水平固定于隔板顶部的顶板；The fixed frame includes a top plate horizontally fixed on the top of the partition through several support rods;
所述顶升框架包括通过若干联动杆水平固定于夹持板顶部的顶升板；The jacking frame includes a jacking plate horizontally fixed on the top of the clamping plate through several linkage rods;
且，夹持板置于隔板和顶板之间，顶升板置于顶板的顶部；Moreover, the clamping plate is placed between the partition plate and the top plate, and the lifting plate is placed on the top of the top plate;
所述隔板的底部设有调平装置，包括设于隔板下表面的球铰和通过顶面的球形槽与球铰贴合的调平板；The bottom of the partition is provided with a leveling device, including a ball hinge on the lower surface of the partition and a leveling plate that fits the ball hinge through the spherical groove on the top surface;
所述夹持板、隔板、球铰，于纵向设有同轴的钢筋孔；且夹持板的钢筋孔内设有钢筋锚固装置；The clamping plate, the partition, and the ball hinge are provided with coaxial steel bar holes in the longitudinal direction; and the steel bar anchoring device is provided in the steel bar holes of the clamping plate;
荷载传感器设于顶升板的底面，用于检测放置于顶板和顶升板之间的顶升装置的拉拔力。The load sensor is arranged on the bottom surface of the lifting plate, and is used for detecting the pulling force of the jacking device placed between the top plate and the lifting plate.
上述顶板呈X型，联动杆分别置于X型顶板的叉隙间。The above-mentioned top plate is X-shaped, and the linkage rods are respectively placed between the fork gaps of the X-shaped top plate.
上述调平板的X轴和Y轴的侧端分别设有螺钉，并通过螺钉与隔板(7)底部的弹簧固定。The side ends of the X-axis and the Y-axis of the above-mentioned leveling plate are respectively provided with screws, and are fixed with the spring at the bottom of the dividing plate (7) by the screws.
上述支撑杆为螺柱，顶板通过螺母可调节的固定在螺柱上。The above-mentioned supporting rods are studs, and the top plate is adjustablely fixed on the studs through nuts.
进一步的，上述螺柱于隔板的底部反向延伸，使得固定框架通过螺柱固定于底座上；隔板通过螺母可调节的固定在螺柱上。Further, the above-mentioned studs extend oppositely from the bottom of the partition, so that the fixed frame is fixed on the base through the studs; the partition is adjustablely fixed on the studs through the nuts.
上述锚固装置包括若干夹片，环形组合呈空心锥形，于轴心处夹持钢筋。The above-mentioned anchoring device includes a plurality of clips, which are annularly assembled in a hollow cone shape and clamp steel bars at the center of the axis.
上述顶升装置包括千斤顶。The above-mentioned jacking device includes a jack.
上述的一种自平衡式钢筋与混凝土粘结滑移测试装置的测试方法，包括以下步骤：The above-mentioned test method of a self-balancing steel bar and concrete bond slip test device comprises the following steps:
S1、将试件放置在底座上，试件钢筋依次穿过调平板、球铰以及隔板预留的钢筋孔；调节螺母，移动隔板，使试件表面与调平板底面充分接触后，拧紧螺母锁住隔板；S1. Place the test piece on the base, and the steel bars of the test piece pass through the steel bar holes reserved by the leveling plate, ball hinge and partition in turn; adjust the nuts, move the partition, make the surface of the test piece fully contact with the bottom surface of the leveling plate, and then tighten The nut locks the partition;
S2、将顶升装置安装在顶板和顶升板之间；根据试件钢筋的位置与顶升装置的尺寸，调节螺母调整顶板的位置；S2. Install the jacking device between the top plate and the jacking plate; according to the position of the steel bar of the test piece and the size of the jacking device, adjust the nut to adjust the position of the top plate;
S3、将锚固装置置于夹持板的钢筋孔内，锚固钢筋；S3, place the anchoring device in the steel bar hole of the clamping plate, and anchor the steel bar;
S4、进行钢筋拉拔试验：驱动顶升装置向上顶起顶升板，实时采集记录荷载传感器的荷载值以及位移计示数，绘制应力—位移曲线。S4. Carry out the steel bar pulling test: drive the jacking device to jack up the jacking plate, collect and record the load value of the load sensor and the displacement meter in real time, and draw the stress-displacement curve.
本发明的有益之处在于：The benefits of the present invention are:
本发明的一种自平衡式钢筋与混凝土粘结滑移测试装置，与现有的技术相比，具有以下优点：A self-balancing steel bar and concrete bond-slip testing device of the present invention has the following advantages compared with the prior art:
(1)在传力路径的设计上简洁合理，能高效地将千斤顶的推力转化成对试件钢筋的拉拔力。在本发明中，大部分的传力构件在工作时皆为受拉状态，能有效地规避压杆稳定问题对试验结果带来的影响；(1) The design of the force transmission path is simple and reasonable, and can efficiently convert the thrust of the jack into the pulling force of the steel bar of the specimen. In the present invention, most of the force-transmitting components are under tension during work, which can effectively avoid the influence of the pressure bar stability on the test results;
(2)本发明为自平衡体系加载试验装置，仅使用简单的动力设备，如旋转千斤顶等即可进行试验，对动力设备的硬件要求较低；(2) The present invention is a self-balancing system loading test device, which only uses simple power equipment, such as a rotating jack, etc. to carry out the test, and has lower hardware requirements for power equipment;
(3)本发明的调平板可有效地在拉拔试验过程中自动调整试件的位置，可使试件钢筋受到垂直的拉拔力，保证了试验的准确性；(3) the leveling plate of the present invention can effectively automatically adjust the position of the test piece in the drawing test process, and can make the test piece steel bar be subjected to the vertical drawing force, ensuring the accuracy of the test;
(4)本发明的构造简单，可拆卸运输，便于转换试验场地，进行现场试验；(4) The structure of the present invention is simple, can be disassembled and transported, and is convenient for changing the test site for on-site tests;
(5)本发明的固定框架顶板与隔板都可以通过旋动顶板、隔板上下两端的螺母进行位置的调整，因此本发明可适用于不同尺寸的试件以及动力装置。(5) Both the fixed frame top plate and the partition plate of the present invention can be adjusted by rotating the nuts at the top and bottom ends of the top plate and the partition plate, so the present invention is applicable to test pieces and power devices of different sizes.
本发明的测试装置设计简洁、结构合理、连接可靠、便于制作，活动性强，可转换不同的试验地点，适用不同大小的试件，其操作简便，无需借助万能试验机等外界加载设备，能有效、准确地进行拉拔试验，为钢筋混凝土的粘结滑移性能测试提供更为可靠的试验装置和技术支撑，具有很强的实用性和广泛的适用性。The test device of the present invention is simple in design, reasonable in structure, reliable in connection, easy to manufacture, strong in mobility, can switch between different test locations, and is suitable for test pieces of different sizes. The effective and accurate pull-out test provides more reliable test equipment and technical support for the bond-slip performance test of reinforced concrete, and has strong practicability and wide applicability.
附图说明Description of drawings
图1为本发明的测试装置的结构示意图；Fig. 1 is the structural representation of test device of the present invention;
图2为本发明的测试装置的结构示意图的仰视图；Fig. 2 is the bottom view of the structural representation of testing device of the present invention;
图3为本发明的测试装置的结构示意图的侧视图；Fig. 3 is the side view of the structural representation of testing device of the present invention;
图4为本发明的顶升板和顶板的结构示意图的俯视图；Fig. 4 is the plan view of the structural representation of jacking plate and top plate of the present invention;
图5为本发明的隔板的结构示意图的仰视图；Fig. 5 is the bottom view of the structural representation of the separator of the present invention;
图6为本发明的调平板的结构示意图；Fig. 6 is the structural representation of leveling plate of the present invention;
图7为本发明的顶升框架的结构示意图；Fig. 7 is a structural schematic diagram of the jacking frame of the present invention;
图8为本发明的锚固装置的结构示意图；Fig. 8 is a schematic structural view of the anchoring device of the present invention;
图9为本发明的测试装置的受力分析图；Fig. 9 is a force analysis diagram of the test device of the present invention;
图10为本发明的试件钢筋的受力分析图。Fig. 10 is a force analysis diagram of the steel bar of the test piece of the present invention.
附图中标记的含义如下：1、固定框架，2、顶升框架，3、荷载传感器，4、千斤顶，5、联动杆，6、顶板，7、隔板，8、钢筋孔，9、螺杆，10、螺母，11、球铰，12、调平板，13、螺钉，14、弹簧，15、试件，16、试件钢筋，17、夹片。The meanings of the marks in the accompanying drawings are as follows: 1. fixed frame, 2. jacking frame, 3. load sensor, 4. jack, 5. linkage rod, 6. top plate, 7. partition, 8. steel bar hole, 9. screw rod , 10, nut, 11, spherical hinge, 12, leveling plate, 13, screw, 14, spring, 15, test piece, 16, test piece steel bar, 17, clip.
具体实施方式Detailed ways
以下结合附图和具体实施例对本发明作具体的介绍。The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.
实施例1Example 1
一种自平衡式钢筋与混凝土粘结滑移测试装置，由固定框架1和顶升框架2组成，测试动力由千斤顶4提供，测试数据由荷载传感器3检测。固定框架1的上部活动安装着顶升框架2，千斤顶4以及荷载传感器3安装在固定框架1顶板6与顶升框架2之间。A self-balancing steel-concrete bond-slip test device consists of a fixed frame 1 and a jacking frame 2, the test power is provided by a jack 4, and the test data is detected by a load sensor 3. The upper part of the fixed frame 1 is movably installed with a jacking frame 2 , and the jack 4 and the load sensor 3 are installed between the top plate 6 of the fixed frame 1 and the jacking frame 2 .
固定框架1由底座、隔板7、顶板6和4根螺杆9组成；螺杆9垂直固定在底座上，依次穿过隔板7和顶板6，并分别用螺母10固定隔板7和顶板6；通过旋动螺母10，可对顶板6、隔板7的位置进行调节，使试验装置可适用于不同尺寸的试件15以及动力装置。优选的，顶板6呈X型。球铰11固定于隔板7的下表面，调平板12通过其上表面的球形槽与球铰11贴合；且于水平面，调平板12的X轴和Y轴的两侧端分别设有可拆卸的螺钉13，调平板12通过螺钉13与固定在隔板7底部的弹簧14连接。调平板12可沿球铰11表面在一定范围内自由滑动。The fixed frame 1 is composed of a base, a partition plate 7, a top plate 6 and four screw rods 9; the screw rods 9 are vertically fixed on the base, pass through the partition plate 7 and the top plate 6 in turn, and fix the partition plate 7 and the top plate 6 with nuts 10 respectively; By turning the nut 10, the positions of the top plate 6 and the partition 7 can be adjusted, so that the test device can be applied to test pieces 15 and power devices of different sizes. Preferably, the top plate 6 is X-shaped. The ball hinge 11 is fixed on the lower surface of the dividing plate 7, and the leveling plate 12 fits the ball joint 11 through the spherical groove on its upper surface; With the screw 13 removed, the leveling plate 12 is connected with the spring 14 fixed on the bottom of the dividing plate 7 through the screw 13 . The leveling plate 12 can slide freely along the surface of the ball joint 11 within a certain range.
顶升框架2由顶升板、夹持板和4根联动杆5组成；顶升板和夹持板相互平行，之间由联动杆5固定连接。设联动杆5截面面积为A，抗拉强度为fy，每根联动杆5所受的拉力为在拉拔试验过程中，联动杆5满足：The jacking frame 2 is composed of a jacking plate, a clamping plate and four linkage rods 5; the jacking plate and the clamping plate are parallel to each other, and are fixedly connected by linkage rods 5. Suppose the cross-sectional area of linkage rod 5 is A, the tensile strength is fy , and the tensile force on each linkage rod 5 is During the pull-out test, the linkage rod 5 satisfies:
即联动杆5在拉拔试验过程中不会被受拉屈服。That is, the linkage rod 5 will not yield under tension during the pull-out test.
固定框架1和顶升框架2相互错位设置。夹持板置于隔板7和顶板6之间，顶升板置于顶板6的顶部；且，联动杆5分别置于X型顶板6的叉隙间；可确保顶升框架2在此穿过时不与其接触，以此规避动力损失，使千斤顶4提供的推力F完全转化成对钢筋实施的拉拔力T，即F＝T。The fixed frame 1 and the jacking frame 2 are mutually staggered. The clamping plate is placed between the partition plate 7 and the top plate 6, and the lifting plate is placed on the top of the top plate 6; and the linkage rods 5 are respectively placed between the fork gaps of the X-shaped top plate 6; it can ensure that the jacking frame 2 passes through here. Do not contact it when it is out of date, so as to avoid power loss, so that the thrust F provided by the jack 4 is completely converted into the pulling force T implemented on the steel bar, that is, F=T.
于夹持板、隔板7、球铰11的中心处，沿纵向，分别预留同轴的供试件钢筋16穿过的钢筋孔8；且夹持板的钢筋孔8内设有钢筋锚固装置，由环形组合呈空心锥形的若干锥形夹片17组成；分离式的锥形夹片17可锲紧在试件钢筋16周围，通过夹片17内表面的锯齿与夹持板的钢筋孔8协同作用，在拉拔试验过程中实现自锚，保证钢筋锚固的可靠。At the center of the clamping plate, the partition 7, and the ball hinge 11, along the longitudinal direction, respectively reserve coaxial reinforcement holes 8 for the specimen reinforcement 16 to pass through; and the reinforcement holes 8 of the clamping plate are provided with reinforcement anchors The device is composed of a plurality of conical clips 17 that are annularly combined to form a hollow cone; the separate conical clips 17 can be wedged around the steel bar 16 of the test piece, and the sawtooth on the inner surface of the clip 17 and the steel bar of the clamping plate Hole 8 works synergistically to realize self-anchoring during the pull-out test to ensure reliable anchorage of steel bars.
荷载传感器3设于顶升板的底面，用于检测放置于顶板6和顶升板之间的顶升装置(千斤顶4)的拉拔力。The load sensor 3 is arranged on the bottom surface of the lifting plate, and is used to detect the pulling force of the jacking device (jack 4) placed between the top plate 6 and the lifting plate.
底座用于搁置混凝土试件15，隔板7用于进行对钢筋的拉拔。The base is used for placing the concrete specimen 15, and the partition 7 is used for pulling out the steel bars.
本发明的使用过程中，试件钢筋16所受到的拉拔力T是由千斤顶4提供的推力F传递给顶升框架2四根联动杆5的拉力T/4共同提供的，即During the use of the present invention, the pull-out force T suffered by the test piece steel bar 16 is provided jointly by the thrust F provided by the jack 4 to the pull T/4 of the four linkage rods 5 of the jacking frame 2, i.e.
顶升框架2的顶板6与底板皆采用厚度、刚度较大的钢板，能保证高效的传力、并保证试验过程中装置不发生影响试验结果精度的变形。装置传力路径如图9所示。Both the top plate 6 and the bottom plate of the jacking frame 2 are thick and rigid steel plates, which can ensure efficient force transmission and ensure that the device does not undergo deformation that affects the accuracy of the test results during the test. The force transmission path of the device is shown in Figure 9.
测试方法，包括以下步骤：The test method includes the following steps:
S1、将试件15放置在底座上，试件钢筋16依次穿过调平板12、球铰11以及隔板7预留的钢筋孔8；调节螺母10，移动隔板7，使试件15表面与调平板12底面充分接触后，拧紧螺母10锁住隔板7；S1, place the test piece 15 on the base, the steel bar 16 of the test piece passes through the steel bar hole 8 reserved by the leveling plate 12, the spherical hinge 11 and the partition 7 in turn; adjust the nut 10, move the partition 7, and make the surface of the test piece 15 After fully contacting the bottom surface of the leveling plate 12, tighten the nut 10 to lock the partition 7;
S2、将千斤顶4安装在顶板6和顶升板之间；根据试件钢筋16的位置与千斤顶4的尺寸，调节螺母10调整顶板6的位置；S2, the jack 4 is installed between the top plate 6 and the jacking plate; according to the position of the steel bar 16 of the test piece and the size of the jack 4, the adjusting nut 10 adjusts the position of the top plate 6;
S3、将锚固装置置于夹持板的钢筋孔8内，将夹片17顶紧，锚固钢筋；顶升千斤顶4，同时调整顶升框架2的位置，使千斤顶4顶紧时顶于顶升板的形心处；S3. Put the anchoring device in the steel bar hole 8 of the clamping plate, tighten the clip 17, and anchor the steel bar; jack up the jack 4, and adjust the position of the jacking frame 2 at the same time, so that the jack 4 is jacked up when it is tight at the centroid of the plate;
S4、进行钢筋拉拔试验：驱动顶升装置向上顶起顶升板，实时采集记录荷载传感器3的荷载值以及位移计示数，绘制应力—位移曲线。试验过程中，调平板12能自动旋转调节位置，使钢筋能被垂直拉拔。S4. Carry out the steel bar pulling test: drive the jacking device to jack up the jacking plate, collect and record the load value of the load sensor 3 and the displacement meter in real time, and draw the stress-displacement curve. During the test, the leveling plate 12 can automatically rotate and adjust the position, so that the steel bar can be drawn vertically.
粘结滑移应力—滑移位移曲线(τ-s)的求法如下：The method of calculating the bond-slip stress-slip displacement curve (τ-s) is as follows:
设试件15锚固长度为l，试件钢筋16直径为d，钢筋应力为σs，拉拔过程中钢筋的粘结平均应力为钢筋截面面积为As，钢筋抗拉强度为fy。则，在拉拔试验过程中，当拉拔力不足以使钢筋屈服，即F＝T≤fyAs时，粘结平均应力可由以下公式求得：Suppose the anchorage length of specimen 15 is l, the diameter of specimen steel bar 16 is d, the stress of steel bar is σs , and the average bonding stress of steel bar in the drawing process is The cross-sectional area of the steel bar is As , and the tensile strength of the steel bar is fy . Then, during the pull-out test, when the pull-out force is not enough to yield the steel bar, that is, F=T≤fy As , the bond average stress can be obtained by the following formula:
实时记录采集荷载传感器3的荷载值F与位移计所测量的滑移长度s，将F通过公式(3)换算出即可绘制应力—位移曲线。Record and collect the load value F of the load sensor 3 and the slip length s measured by the displacement meter in real time, and convert F through formula (3) to obtain The stress-displacement curve can be drawn.
试件钢筋16受力分析图如图10所示。The stress analysis diagram of the specimen steel bar 16 is shown in Fig. 10 .
实施例2Example 2
上述的实施例1的测试装置的结构，以底座提供平衡，隔板7基于底座相对平衡，混凝土试件15放置在底座和隔板7之间，适用的试件15体积相对较小，尤其适用于实验室研究的一定体积的浇筑型试件15。而对从现有建筑中破碎出来的，或具有较大体积的试件15的检测，则可利用本发明的实施例2的结构检测：The structure of the test device of the above-mentioned embodiment 1 provides balance with the base, and the partition plate 7 is relatively balanced based on the base, and the concrete specimen 15 is placed between the base and the partition plate 7, and the applicable specimen 15 is relatively small in volume, especially suitable for A certain volume of cast-type test piece 15 studied in the laboratory. And for the detection of the test piece 15 that is broken out from the existing building, or has a larger volume, then the structure detection of embodiment 2 of the present invention can be utilized:
即，在实施例1的测试装置的结构基础上，去除隔板7底部的螺柱和底座，则可获得可放置混凝土试件15的大空间，以混凝土试件15为基础，于混凝土顶面的钢筋处直接适用测试装置，并进行拉拔试验。检测原理和过程与实施例1相同。且简化的结构，也更适用于户外使用，便于携带和检测。That is, on the basis of the structure of the testing device in Embodiment 1, the studs and the base at the bottom of the partition plate 7 can be removed to obtain a large space where the concrete specimen 15 can be placed. Based on the concrete specimen 15, the concrete top surface The test device is directly applied to the steel bar, and the pull-out test is carried out. The detection principle and process are the same as in Example 1. And the simplified structure is also more suitable for outdoor use, and is easy to carry and detect.
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解，上述实施例不以任何形式限制本发明，凡采用等同替换或等效变换的方式所获得的技术方案，均落在本发明的保护范围内。The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201910788811.5ACN110426344A (en) | 2019-08-26 | 2019-08-26 | A kind of self-balancing type reinforcing bar and concrete binding sliding test device and test method |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788811.5ACN110426344A (en) | 2019-08-26 | 2019-08-26 | A kind of self-balancing type reinforcing bar and concrete binding sliding test device and test method |
| Publication Number | Publication Date |
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| CN110426344Atrue CN110426344A (en) | 2019-11-08 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201910788811.5APendingCN110426344A (en) | 2019-08-26 | 2019-08-26 | A kind of self-balancing type reinforcing bar and concrete binding sliding test device and test method |
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