Uniform distribution loading test device for simulating mechanical property of cross-shaped steel beam composite floor system

Abstract

The utility model discloses a uniform distribution loading test device for simulating mechanical properties of a cross-shaped steel beam composite floor system, and relates to a test loading device. The utility model aims to solve the problem that the conventional loading device can only realize concentrated force loading of a cross-shaped steel beam composite floor system and cannot apply larger uniformly distributed load. The device comprises a reaction frame, a vertical hydraulic jack, a force measuring sensor, a distribution beam, a balancing weight and a supporting column, a stiffening rib section in the middle of a longitudinal steel beam of a frame of the reaction frame is rotationally connected with the vertical hydraulic jack through a hinge mechanism, and the force measuring sensor is installed on the vertical hydraulic jack. The axes of the vertical hydraulic jack and the force measuring sensor are kept perpendicular to the ground, the lower ends of the vertical hydraulic jack and the force measuring sensor are in surface contact connection with the first-stage distribution beam and the second-stage distribution beam, the first-stage distribution beam and the second-stage distribution beam are in surface contact connection with the balancing weight, and the lower supporting column is connected with the supporting column bottom support through a bolt. And a bottom support of the supporting column is connected with the ground through a ground anchor bolt. The device is used for the uniform distribution loading test of the cross-shaped steel beam composite floor system.

Description

Technical Field

[0001] The utility model relates to a test loading device, in particular to a test device for simulating uniformly distributed loading of mechanical properties of a cross steel beam combined floor. Background Art

[0002] With the development of building structure technology and economic society, cross-steel beam composite floor with high bearing capacity has been gradually applied in industrial and civil buildings. The cross-steel beam connection node structure of this type of composite floor structure has a great influence on the bearing capacity, stiffness and failure mode of the floor, which needs to be verified by experiments. The conventional centralized loading device in the existing laboratory cannot consider the influence of concrete floor on the mechanical properties of the composite floor. Therefore, it is necessary to propose a composite floor connection node mechanical property simulation uniform loading test device with simple structure, convenient operation, safety and reliability. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a uniformly distributed loading test device for simulating mechanical properties of joints of combined floor slabs. The test device has simple structure, convenient operation, safety and reliability.

[0004] The utility model adopts the following technical solution to solve the above technical problems: a device for simulating uniformly distributed loading of mechanical properties of joints of combined floor slabs, comprising a reaction frame, a vertical hydraulic jack, a force sensor, a distribution beam, a counterweight and a support column. The stiffening rib section in the middle of the longitudinal steel beam of the reaction frame is rotatably connected with the vertical hydraulic jack through a hinge mechanism. The force sensor is installed on the vertical hydraulic jack. The axes of the vertical hydraulic jack and the force sensor are collinear and vertical to the ground. The lower ends of the vertical hydraulic jack and the force sensor are connected to the vertical hydraulic jack. The upper surface of the first-level distribution beam is connected by surface contact, the lower surface of the first-level distribution beam is connected to the upper surface of the second-level distribution beam by surface contact, the lower surface of the second-level distribution beam is connected to the counterweight by surface contact, the counterweight is placed on the upper surface of the composite floor specimen, the composite floor specimen is integrally connected by bolts and cast-in-place reinforced concrete, the supporting column is connected to the composite floor specimen by bolt welding, the supporting column is connected to the bottom support of the supporting column by anchor bolts, the vertical hydraulic jack and the force sensor are vertically arranged, and the center line passes through the geometric center of the composite floor specimen and is perpendicular to the ground.

[0005] A plurality of anchor bolt installation hole groups are provided on the ground, the bottom support of the support column is connected to the ground via bolt I, the support column is connected to the bottom support of the support column via bolt II, and the upper end of the support column is connected to the cross beam composite floor steel side beam via bolt III.

[0006] A pin shaft is provided in the middle of the longitudinal steel beam of the reaction frame and is rotatably connected to the vertical hydraulic jack. The pin shaft is colinear with the axis of the vertical hydraulic jack and is perpendicular to the ground. The force sensor is installed on the end face of the vertical hydraulic jack away from the longitudinal steel beam. A stiffening rib is provided in the connecting section between the middle of the longitudinal steel beam of the reaction frame and the vertical hydraulic jack.

[0007] The axis of the first-level distribution beam is parallel to the ground and coplanar with the axis of the vertical hydraulic jack. The axis of the second-level distribution beam is perpendicular to the axis of the first-level distribution beam and parallel to the ground. The first and second-level distribution beams are connected by surface contact. The second-level distribution beam is arranged on four sets of counterweight blocks and is connected to the counterweight blocks by surface contact. The axis of the second-level distribution beam passes through the geometric center of the counterweight blocks.

[0008] The stiffening ribs include top reaction frame longitudinal steel beam stiffening ribs, distribution beam stiffening ribs and bottom support stiffening ribs. The three top reaction frame longitudinal steel beam stiffening ribs are symmetrically arranged in the middle of the reaction frame longitudinal steel beam, respectively located on both sides of all the longitudinal steel beam sections, and fixedly connected to the web and flange of the longitudinal steel beam. The seven distribution beam stiffening ribs are symmetrically arranged on both sides of the distribution beam section, and are welded to the web and flange of the distribution beam. The eight bottom support stiffening ribs are evenly distributed at the four corners of the supporting column bottom plate and the supporting column bottom support bottom plate, and are vertically welded to the supporting column bottom plate and the supporting column bottom support bottom plate.

[0009] The advantages and positive effects of the utility model are as follows: by arranging mutually perpendicular primary and secondary distribution beams and counterweights between the vertical hydraulic jack and the composite floor specimen, uniformly distributed load mode loading of the cross steel beam composite floor test is achieved, and the test device has a simple structure, convenient operation, and is convenient for installation and disassembly of the specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of the test device of the utility model;

[0011] Figure 2 It is a top view of the utility model;

[0012] Figure 3 It is a front view of the utility model;

[0013] Figure 4 It is a side view of the utility model;

[0014] Figure 5 This is a schematic diagram of the cross steel beam composite floor structure of the utility model;

[0015] In the figure: 1. reaction frame column; 2. reaction frame beam; 3. stiffening rib; 4. reaction frame longitudinal steel beam; 5. pin shaft; 6. vertical hydraulic jack; 7. force sensor; 8. primary distribution beam; 9. secondary distribution beam; 10. counterweight; 11. composite floor specimen; 1101. side beam; 1102. main axis beam; 1103. secondary axis beam; 1104. node; 1105. concrete slab; 12. supporting column; 13. bottom support of supporting column. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0017] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0020] See also Figure 1 to Figure 4A test device for simulating uniformly distributed loading of mechanical properties of composite floor connection nodes, comprising a reaction frame, a vertical hydraulic jack, a force sensor, a distribution beam, a counterweight and a supporting column. The middle stiffening rib section of the longitudinal steel beam of the reaction frame is rotatably connected to the vertical hydraulic jack through a hinge mechanism. The force sensor is installed on the vertical hydraulic jack. The axes of the vertical hydraulic jack and the force sensor are colinear and perpendicular to the ground. The lower ends of the vertical hydraulic jack and the force sensor are connected to the first and second distribution beams by surface contact. The first and second distribution beams and the counterweight are connected by surface contact. The supporting column is connected to the composite floor specimen by bolt welding, the lower supporting column is connected to the bottom support of the supporting column by bolts, and the bottom support of the supporting column is connected to the ground by anchor bolts.

[0021] This design connects the upper surface of the composite floor specimen with the counterweight block, connects the composite floor specimen with the supporting column by bolt welding, and limits the lateral displacement of the composite floor by the supporting column, so as to effectively position the composite floor specimen, apply a vertical concentrated load to the composite floor specimen by a vertical hydraulic jack, convert the concentrated load applied by the vertical hydraulic jack into a uniformly distributed load by the first and second level distribution beams and the counterweight block, and connects the vertical hydraulic jack with the reaction frame by a rotating mechanism to ensure that during the loading process of the composite floor specimen, the concentrated load applied by the vertical hydraulic jack always passes through the centroid of the composite floor specimen, and the redistribution of the load by the first and second level distribution beams ensures the uniformity of the conversion of the concentrated load into the uniformly distributed load.

[0022] In this embodiment, a plurality of ground anchor bolt installation hole groups are provided on the ground, the bottom support of the support column is connected to the ground by bolt I, the support column is connected to the bottom support of the support column by bolt II, a plurality of specimen installation hole groups are provided on the upper end of the support column near the composite floor specimen, and the composite floor specimen is connected to the support column by bolt III. The position-adjustable bolt connection structure is adopted, which is flexible and practical, and the test device can be used for uniform loading tests of composite floors with different plate thicknesses.

[0023] In this embodiment, the stiffening ribs include top reaction frame longitudinal steel beam stiffening ribs, distribution beam stiffening ribs and bottom support stiffening ribs. The three top reaction frame longitudinal steel beam stiffening ribs are symmetrically arranged in the middle of the reaction frame longitudinal steel beam, respectively located on both sides of all the longitudinal steel beam sections, and fixedly connected to the web and flange of the longitudinal steel beam, so as to improve the bending stiffness of the reaction frame longitudinal steel beam. The seven distribution beam stiffening ribs are symmetrically arranged on both sides of the distribution beam section, and fixedly connected to the web and flange of the distribution beam. The eight bottom support stiffening ribs are evenly distributed at the four corners of the supporting column bottom plate and the supporting column bottom support bottom plate, and are vertically welded to the supporting column bottom plate and the supporting column bottom support bottom plate, so as to improve the bearing capacity of the components.

[0024] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A test device for simulating uniformly distributed loading of mechanical properties of a cross steel beam composite floor, characterized in that: The device for simulating uniformly distributed loading test of mechanical properties of cross steel beam composite floor comprises a reaction frame, a vertical hydraulic jack, a force sensor, a distribution beam, a counterweight and a supporting column. The upper end of the vertical hydraulic jack is rotatably connected to the middle stiffening rib section of the longitudinal steel beam of the reaction frame through a hinge mechanism. The lower end of the vertical hydraulic jack is connected with a force sensor. The lower end of the force sensor is connected to the upper surface of the first-level distribution beam through surface contact, the lower surface of the first-level distribution beam is connected to the upper surface of the second-level distribution beam through surface contact, the lower surface of the second-level distribution beam is connected to the counterweight through surface contact, and the counterweight is placed on the upper surface of the composite floor specimen. The composite floor specimen is integrally connected through bolts and cast-in-place reinforced concrete, the supporting column is connected to the composite floor specimen through bolt welding, and the supporting column is connected to the bottom support of the supporting column through anchor bolts. The vertical hydraulic jack and the force sensor are vertically arranged, and the center line passes through the geometric center of the composite floor specimen and is perpendicular to the ground.

2. The device for simulating uniformly distributed loading of mechanical properties of a cross steel beam composite floor according to claim 1, characterized in that: A plurality of ground anchor bolt mounting hole groups are provided on the ground, the bottom support of the supporting column is connected to the ground by bolt I, the supporting column is connected to the bottom support of the supporting column by bolt II, a plurality of specimen mounting hole groups are provided on the upper end of the supporting column near the combined floor specimen, and the steel beam of the combined floor specimen is connected to the supporting column by bolt III.

3. The device for simulating uniformly distributed loading of mechanical properties of a cross steel beam composite floor according to claim 2, characterized in that: A pin shaft rotatably connected to the vertical hydraulic jack is provided in the middle of the longitudinal steel beam of the reaction frame. The pin shaft is colinear with the axis of the vertical hydraulic jack and is perpendicular to the ground. The force sensor is installed on the end surface of the vertical hydraulic jack away from the longitudinal steel beam. The lower end of the force sensor is connected to the upper surface of the first-level distribution beam through surface contact, the lower surface of the first-level distribution beam is connected to the upper surface of the second-level distribution beam through surface contact, and the lower surface of the second-level distribution beam is connected to the counterweight block through surface contact. A stiffening rib is provided in the connecting section between the middle of the longitudinal steel beam of the reaction frame and the vertical hydraulic jack.

4. The device for simulating uniformly distributed loading of mechanical properties of a cross steel beam composite floor according to claim 3 is characterized in that: The axis of the first-level distribution beam is parallel to the ground and coplanar with the axis of the vertical hydraulic jack. The axis of the second-level distribution beam is perpendicular to the axis of the first-level distribution beam and parallel to the ground. The first and second-level distribution beams are connected by surface contact. The second-level distribution beam is arranged on four sets of counterweight blocks and is connected to the counterweight blocks by surface contact. The axis of the second-level distribution beam passes through the geometric center of the counterweight blocks.

5. The device for simulating uniformly distributed loading of mechanical properties of a cross steel beam composite floor according to claim 3, characterized in that: The stiffening ribs include top reaction frame longitudinal steel beam stiffening ribs, distribution beam stiffening ribs and bottom support stiffening ribs. The three top reaction frame longitudinal steel beam stiffening ribs are symmetrically arranged in the middle of the reaction frame longitudinal steel beam, respectively located on both sides of all the longitudinal steel beam sections, and fixedly connected to the web and flange of the longitudinal steel beam. The seven distribution beam stiffening ribs are symmetrically arranged on both sides of the distribution beam section, and are welded to the web and flange of the distribution beam. The eight bottom support stiffening ribs are evenly distributed at the four corners of the supporting column bottom plate and the supporting column bottom support bottom plate, and are vertically welded to the supporting column bottom plate and the supporting column bottom support bottom plate.

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