A graded yield Z-shaped mild steel damper

Abstract

A multi-purpose graded yield Z-shaped soft steel damper, comprising a mounting frame and a damper body, wherein the mounting frame is mounted on the upper and lower ends of the damper body by anchors, and the damper body comprises an energy-absorbing steel sheet, a Z-shaped energy-absorbing steel sheet, and an energy-absorbing steel sheet anchoring plate, wherein two of the energy-absorbing steel sheets are fixed between two energy-absorbing steel sheet anchoring plates, and a plurality of Z-shaped energy-absorbing steel sheets are arranged between the two energy-absorbing steel sheets, wherein the plurality of Z-shaped energy-absorbing steel sheets are arranged longitudinally along the extension direction of the energy-absorbing steel sheets, and a single Z-shaped energy-absorbing steel sheet is arranged transversely. The beneficial effects of the present invention are as follows: a multi-purpose graded yield Z-shaped soft steel damper can achieve graded yield, has strong deformation capacity, and excellent fatigue resistance, and can more effectively prevent the collapse of buildings when an earthquake occurs, thereby achieving the goal of building earthquake resistance. The Z-shaped soft steel damper elements of the present invention are all connected by bolts or welding, which is convenient for engineering processing and installation, and has high economic benefits.

Description

Technical Field

[0001] The invention relates to the field of earthquake-resistant analysis and shock absorption control in civil engineering, and in particular to a graded yielding Z-shaped soft steel damper, which is mainly used in frame structures. Background Art

[0002] The new damper has the function of energy dissipation and shock absorption. Soft steel has the characteristics of high density, good plasticity, large linear expansion coefficient and low yield strength. When an earthquake occurs, the damper or damping component will produce elastic-plastic or viscoelastic hysteresis deformation, effectively consuming earthquake energy and reducing the seismic response of the main structure under the action of the earthquake, thereby avoiding the collapse of the building and achieving the goal of building earthquake resistance. The types of steel dampers currently studied mainly include: butterfly-shaped, U-shaped and other annular metal soft steel dampers; braided metal dampers; conical and double-conical steel rod dampers; stiffened steel plate dampers; open metal dampers; axial tension metal dampers; bidirectional axial torsion metal dampers, etc.

[0003] The metal dampers currently studied have the following problems:

[0004] 1. When the damper is subjected to stress in the plane, the web is prone to buckling, local stress concentration, residual stress and strain, and out-of-plane instability needs to be resolved;

[0005] Second, if a general metal damper is damaged after an earthquake, it cannot be replaced in time;

[0006] 3. General metal dampers fail to achieve graded yielding and have complex structures;

[0007] 4. Generally, dampers are used in a single position and can only be used in specific positions of components. Summary of the invention

[0008] The purpose of the present invention is to provide a graded yield Z-shaped mild steel damper, which can achieve graded yield, strong deformation ability, excellent fatigue resistance, and can more effectively avoid building collapse when an earthquake occurs, thereby achieving the goal of building earthquake resistance.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A graded yield Z-shaped soft steel damper comprises a mounting frame and a damper body, wherein the mounting frame is mounted on the upper and lower ends of the damper body through anchors, and the damper body comprises an energy-absorbing steel sheet, a Z-shaped energy-absorbing steel sheet, and an energy-absorbing steel sheet anchoring plate, wherein two energy-absorbing steel sheets are fixed between two energy-absorbing steel sheet anchoring plates, and a plurality of Z-shaped energy-absorbing steel sheets are arranged between the two energy-absorbing steel sheets, wherein the plurality of Z-shaped energy-absorbing steel sheets are arranged longitudinally along the extension direction of the energy-absorbing steel sheets, and a single Z-shaped energy-absorbing steel sheet is arranged transversely.

[0011] The number of the Z-shaped energy-absorbing steel sheets is an even number greater than or equal to 4.

[0012] The Z-shaped energy-absorbing steel sheets are divided into several groups, each group has two Z-shaped energy-absorbing steel sheets, the distance between the two Z-shaped energy-absorbing steel sheets in each group is 4d, the distance between the two groups of Z-shaped energy-absorbing steel sheets is 2d, the distance between the outermost Z-shaped energy-absorbing steel sheet and the edge of the energy-absorbing steel sheet anchor plate is d, and the energy-absorbing steel sheet anchor plate is of the same length as the energy-absorbing steel sheet.

[0013] d=20mm-30mm.

[0014] The energy-absorbing steel sheet is a hole-shaped steel sheet.

[0015] The mounting frame includes a connecting plate, a steel friction plate, and a rubber friction plate. The connecting plate is a long plate, and the middle position is the mounting position of the damper body. The steel friction plate and the rubber friction plate are installed at both ends of the connecting plate. The steel friction plate and the rubber friction plate are symmetrically arranged on the upper and lower surfaces of the connecting plate, and the rubber friction plate is placed between the connecting plate and the steel friction plate. The upper and lower steel friction plates are connected by anchors.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A graded yield Z-shaped soft steel damper can achieve graded yield, has strong deformation capacity, and excellent fatigue resistance. It can more effectively prevent building collapse when an earthquake occurs, thereby achieving the goal of building earthquake resistance. The Z-shaped soft steel damper elements of the invention are all connected by bolts or welding, and have a simple structure and are easy to process and install in engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the Z-shaped soft-rigid damper;

[0019] Figure 2 yes Figure 1 A front view of

[0020] Figure 3 yes Figure 1 Side view of

[0021] Figure 4 It is a structural diagram of the damper body;

[0022] Figure 5 It is a diagram showing the installation position relationship of the Z-shaped energy-absorbing steel sheet in the present invention.

[0023] In the figure: 1-steel plate friction plate, 2-rubber friction plate, 3-upper connecting plate, 4-energy absorbing steel sheet upper anchoring plate, 5-energy absorbing steel sheet, 6-Z-shaped energy absorbing steel sheet, 7-energy absorbing steel sheet lower anchoring plate, 8-lower connecting plate. DETAILED DESCRIPTION

[0024] The present invention is described in detail below, but the implementation scope of the present invention is not limited to the following embodiments.

[0025] like Figure 1-Figure 5 As shown, a graded yield Z-shaped mild steel damper includes a mounting frame and a damper body. The mounting frame is installed at the upper and lower ends of the damper body through anchors. The damper body includes an energy-absorbing steel sheet 5, a Z-shaped energy-absorbing steel sheet 6, and an energy-absorbing steel sheet anchoring plate 4. Two of the energy-absorbing steel sheets 5 are fixed between two energy-absorbing steel sheet anchoring plates 4. A plurality of Z-shaped energy-absorbing steel sheets 6 are arranged between the two energy-absorbing steel sheets 5. The plurality of Z-shaped energy-absorbing steel sheets 6 are arranged longitudinally along the extension direction of the energy-absorbing steel sheets 5, and a single Z-shaped energy-absorbing steel sheet 6 is arranged transversely.

[0026] The number of the Z-shaped energy-absorbing steel sheets 6 is an even number greater than or equal to 4.

[0027] The Z-shaped energy-absorbing steel sheets 6 are divided into several groups, each group has two Z-shaped energy-absorbing steel sheets 6, the distance between the two Z-shaped energy-absorbing steel sheets 6 in each group is 4d, the distance between the two groups of Z-shaped energy-absorbing steel sheets 6 is 2d, the distance between the outermost Z-shaped energy-absorbing steel sheet 6 and the edge of the energy-absorbing steel sheet anchor plate 4 is d, and the energy-absorbing steel sheet anchor plate 4 is of the same length as the energy-absorbing steel sheet 5.

[0028] d=20mm-30mm.

[0029] The energy-absorbing steel sheet 5 is a hole-shaped steel sheet.

[0030] The mounting frame includes a connecting plate (an upper connecting plate 3 and a lower connecting plate 8), a steel plate friction plate 1, and a rubber friction plate 2. The connecting plate is a long plate, and the middle position is the mounting position of the damper body. The steel plate friction plate 1 and the rubber friction plate 2 are mounted at both ends of the connecting plate. The steel plate friction plate 1 and the rubber friction plate 2 are symmetrically arranged on the upper and lower surfaces of the connecting plate, and the rubber friction plate 2 is placed between the connecting plate and the steel plate friction plate 1. The upper and lower steel plate friction plates 1 are connected by anchors.

[0031] A graded yielding Z-shaped soft steel damper of the present invention has the following shock absorption performance after simulation software and test analysis: under the action of a small earthquake (when the loading displacement is 10 mm), the Z-shaped energy-absorbing steel sheet 6 arranged in the middle yields first, and the energy-absorbing steel sheets 5 on both sides remain in an elastic state; under the action of a medium or large earthquake (when the loading displacement is 30 mm), the energy-absorbing steel sheets 5 on both sides gradually yield and consume energy together with the middle Z-shaped energy-absorbing steel sheet 6, and the second energy-absorbing defense line loses its energy-absorbing capacity, thereby achieving a graded yielding effect.

[0032] When in use, the graded yielding Z-shaped mild steel damper of the present invention is connected to the herringbone support through a short beam and a connecting plate, and is installed under the frame beam for energy dissipation. The left and right friction steel plates 1 at the bottom of the Z-shaped mild steel damper have reserved anchor holes and are connected to the short beam through bolts, and the left and right friction steel plates 1 at the top of the Z-shaped damper have reserved anchor holes and are connected to the frame beam through embedded bolts, so that they can be replaced in time when damaged. This method effectively improves the integrity of the connection between the Z-shaped mild steel damper and the frame beam, forming a connecting beam combined energy dissipation; it can also be placed in the middle part of the frame beam according to different assembly methods.

[0033] The energy-absorbing steel plate 5 of the Z-shaped soft-rigid damper of the present invention is welded on the energy-absorbing steel plate anchoring plate 4, and the energy-absorbing steel plate anchoring plate 4 is anchored and connected with the upper and lower connecting plates (3, 8); the upper and lower steel plate friction plates 1 clamp the connecting plate and the rubber friction plate 2 in the middle through anchoring; it is convenient to replace the damaged energy-absorbing steel plate. The rubber friction plate can prevent the steel plate friction plate 1 from directly contacting the connecting plate to increase the damper loss, and can also reduce noise.

Claims

1. A multi-purpose graded yield Z-shaped mild steel damper, characterized in that: It includes a mounting frame and a damper body, wherein the mounting frame is mounted on the upper and lower ends of the damper body through anchors, and the damper body includes an energy-absorbing steel sheet, a Z-shaped energy-absorbing steel sheet, and an energy-absorbing steel sheet anchoring plate, wherein two energy-absorbing steel sheets are fixed between two energy-absorbing steel sheet anchoring plates, and a plurality of Z-shaped energy-absorbing steel sheets are arranged between the two energy-absorbing steel sheets, wherein the plurality of Z-shaped energy-absorbing steel sheets are arranged longitudinally along the extension direction of the energy-absorbing steel sheets, and a single Z-shaped energy-absorbing steel sheet is arranged transversely; The number of the Z-shaped energy-absorbing steel sheets is an even number greater than or equal to 4; The Z-shaped energy-absorbing steel sheets are divided into several groups, each group has two Z-shaped energy-absorbing steel sheets, the distance between the two Z-shaped energy-absorbing steel sheets in each group is 4d, the distance between the two groups of Z-shaped energy-absorbing steel sheets is 2d, the distance between the outermost Z-shaped energy-absorbing steel sheet and the edge of the energy-absorbing steel sheet anchoring plate is d, and the energy-absorbing steel sheet anchoring plate is of equal length to the energy-absorbing steel sheet; d = 20mm-30mm; The energy-absorbing steel sheet is a hole-shaped steel sheet.

2. A multi-purpose graded yield Z-shaped mild steel damper according to claim 1, characterized in that: The mounting frame includes a connecting plate, a steel friction plate, and a rubber friction plate. The connecting plate is a long plate, and the middle position is the mounting position of the damper body. The steel friction plate and the rubber friction plate are installed at both ends of the connecting plate. The steel friction plate and the rubber friction plate are symmetrically arranged on the upper and lower surfaces of the connecting plate, and the rubber friction plate is placed between the connecting plate and the steel friction plate. The upper and lower steel friction plates are connected by anchors.

Images