CN201292582Y - Light-duty three heavy metal circular tube flexion constrain support energy consuming machine - Google Patents

Abstract

The utility model relates to a light-duty triple metal circular tube buckling restraint support energy dissipator, which is composed of a core stress tube, a buckling restraint tube, a positioning bolt and an end connector. The core stress tube is made of metal material with low yield strength and excellent ductility. The end section is reinforced by slotting in the middle to ensure that the end section is in an elastic stress state during the entire stress process and is located within the buckling constraint Between the pipe and the outer pipe; the buckling restraint pipe is composed of the inner restraint pipe, the outer restraint pipe and the filler slats, the inner and outer restraint pipes restrict the local buckling of the core stressed pipe along the radial direction, and provide resistance to prevent the overall buckling of the energy dissipator Bending rigidity; the filling slats are connected with the inner pipe along the supporting axis, and have considerable bending rigidity, which can limit the movement of the yield section of the core pipe along the tangential direction; the positioning bolt is used to fix the relative position between the triple metal round pipes Location.

Description

Buckling-constrained brace energy dissipator of lightweight triple metal circular tube

technical field

The utility model relates to a novel buckling-constrained support energy dissipator, which belongs to the field of civil engineering and can be used for building or reinforcing engineering structures to improve the anti-seismic capability and thereby improve the structural safety.

Background technique

In normal use or when the structure encounters a small earthquake, the buckling restraint support energy dissipator set in the structure can provide effective support for the structure, and under the action of a moderate earthquake or a rare earthquake, it will use the yield and hysteresis properties of the metal Dissipate seismic energy, protect the main structure, and can be easily replaced after an earthquake.

Buckling-constrained braced energy dissipators are generally composed of core stress-bearing components, buckling-constrained components, unbonded isolation and compressible layers, and end connection components. The force component is always in a state close to the axial force during the whole process of stress without overall or low-order local buckling, and will produce tension-compression plastic deformation under the action of external force to consume the energy input by the earthquake into the structure.

The core bearing parts of the buckling-restrained brace can be divided into the following three regions: the constrained yielding segment, the constrained non-yielding segment and the unconstrained non-yielding segment. The restrained yield section is the most important area of the core stress-bearing parts, and the most common cross-section forms in the past are straight and cross-shaped cross-sections. The unconstrained non-yielding section is the part where the buckling-constrained brace is connected to the main structure, usually by bolts, but also by welding. In order to ensure that the yield effect of the energy dissipator only occurs in the constrained yield section during the stress process, and to ensure the reliability of the end connection, it is necessary to ensure that the unconstrained non-yielding section is always in an elastic state. In order to achieve this goal, the previous measures are Increase the area of the unconstrained non-yielding section, or take structural measures such as stiffeners. The constrained non-yielding section is the part connecting the constrained yielding section and the unconstrained yielding section. Since the cross-sectional areas of the above two parts are not equal, the constrained non-yielding section is used as a transition part between the two, and the change of the section should be gentle, so as to avoid stress concentrated. The core stress-bearing parts are often made of Q235B steel or low-yield steel with good ductility.

As an important part of the buckling-restrained brace, buckling-restrained components need to have sufficient bending stiffness to ensure that the core stressed parts are in a relatively ideal state of axial tension and compression and produce tension-compression plastic deformation, so that the buckling-restrained brace Give play to superior energy consumption performance. In the existing buckling-constrained braced energy dissipators, the buckling-constrained components generally adopt the method of pouring concrete and mortar in the steel casing to provide constraints for the core stress-bearing components. Due to the heavy weight of concrete or mortar, it will have adverse effects on the manufacture, installation and performance of energy consumers. At the same time, due to the discreteness of the quality of concrete or mortar, it also affects the stable performance of the energy consumption performance of the energy consumer. Another problem with existing buckling-constrained braced dissipators is to protect the non-buckling section by enlarging the end section, but this often increases the difficulty in manufacture.

Contents of the invention

The technical problem to be solved by the utility model is to provide a light-duty triple metal tube buckling-constrained support energy dissipator with reasonable structure, convenient manufacture and installation, and stable energy dissipation capacity.

The technical scheme of the utility model is as follows: a light-duty triple metal circular tube buckling restraint support energy dissipator, which consists of a core force-bearing part, a buckling restraint part, a positioning bolt and an end connector, and the core force-bearing part is the core Stressed tubes, the buckling restraint components are inner restraint tubes, outer restraint tubes and filling slats, and the core stress tube is arranged between the inner restraint tubes and the outer restraint tubes, and its length is longer than the inner restraint tubes and the outer restraint tubes. The length of the outer restraint tube is fixed at one end of the core force-bearing tube, the inner restraint tube and the outer restraint tube with positioning bolts, and at least two a long slot, the end connectors are arranged at the two ends of the core stress tube, the filler strip is fixed on the outer surface of the inner restraint tube, and the shape of the filler strip is similar to that of the long slot. adapt.

Due to the limitation of the inner and outer restraint tubes, the core stress-bearing components will not undergo low-order buckling deformation along the radial direction of the circular tube when they are under pressure, thus forcing them to reach a stress state close to full-section yield. In order to prevent the core stress-bearing tube from deforming along the tangential direction of the circular tube, a filling strip is arranged on the outer surface of the inner restraining tube, and the shape of the filling plate is adapted to the long groove. This measure will play a role especially after the core stress tube yields under compression. If the above measures are not taken at this time, the buckling along the radial direction is subject to internal and external constraints due to the decrease of the tangent modulus of the core metal and the sharp decrease of the bending stiffness. Due to the limitation of the tube, the core stress tube may produce tangential deformation.

In order to reduce the stress concentration in the region of the constrained non-yielding section at the end of the core stressed tube, a diversion hole is also provided on the core stressed tube, and the diversion hole is located outside the effective area of the constrained yielding section.

Since the length of the inner and outer restraint tubes is shorter than that of the core force-bearing tube, in order to facilitate the fixing of the positional relationship between the three during manufacture, a positioning hole is opened at the same position at one end of the triple metal tube, and the positioning bolt is penetrated. On the core stress tube, the position of the positioning hole is located at the constrained non-yielding section outside the long slot, and on the central extension line of the long slot.

Compared with the prior art, the utility model has the following advantages:

1. The utility model's light-duty triple metal circular tube buckling restraint support energy dissipator includes the core stress tube and inner and outer restraint tubes, and ensures the constraining non-yielding section by opening long slots in the core stress tube constraining yield section And the unconstrained non-yielding section is in the state of elastic force, the structure is simple, the production is convenient, and it is easy to realize.

2. By setting diversion holes outside the long groove of the core stress tube, that is, on the constrained non-yielding section, the degree of stress concentration in the constrained non-yielding section at the end of the core stress tube is reduced. The setting of the diversion holes can make the constraint When the stress in the yielding section is transferred to the constrained non-yielding section, it can be properly divided, so that the stress distribution in the constrained non-yielding section is more even, so as to ensure that the stress in this area is always at a low level and will not enter yield state, protect the constrained non-yielding section and the unconstrained non-yielding section, and make the connection between the unconstrained non-yielding section and the end connection plate more reliable.

3. Filling slats are installed on the inner restraint tube, and the filling slats are fixed on the outer surface of the inner restraint tube by strong structural glue or other methods. It is less than the width of the long groove, and its length is less than the length of the long groove and leaves a space for the compression deformation of the core stress tube. The role of the filler slats is to prevent the core stress tube from deforming along the tangential direction of the circular tube. Especially after the core stress tube yields under compression, due to the decrease of the tangent modulus of the core metal, the bending stiffness drops sharply, and the buckling along the radial direction is limited by the inner and outer restraint tubes, the core stress tube may produce tangential deformation. At this time, the filler slats can provide support for the core tube by relying on the stiffness of the inner restraint tube.

4. The energy dissipator of the buckling-restrained support of the light-duty triple metal circular tube is all made of metal, with small material dispersion and stable performance; it significantly reduces the weight of the buckling-restrained support and reduces the difficulty of construction;

5. The unconstrained section of the core stress-bearing tube of the core force-bearing tube of the light-duty triple metal circular tube adopts a circular tube-shaped cross-section, which has a large bending rigidity in all directions, which can effectively prevent the overall or local buckling phenomenon;

6. The location of the positioning hole of the utility model is located in the constrained non-yielding section outside the long groove on the core force-bearing pipe, and on the central extension line of the long groove. When the energy consumer is working, the stress here is very small, which will not affect the normal performance of the energy dissipation capability.

7. The light-duty triple metal circular tube buckling-constrained support energy dissipator of the present invention does not use welding process except for the end connection, has no welding residual stress, and does not produce welding residual deformation, which can further ensure the stability of its performance.

8. Due to the circular cross-section, the energy dissipator of the light triple metal circular tube buckling restraint support of the utility model has a beautiful appearance, and can meet the shape requirements of most structures without other modifications. When applied to space structure shock absorption has special advantages.

Description of drawings

Fig. 1 is the top view of the assembled light-duty triple metal circular tube buckling-constrained support energy dissipator provided by the utility model

Fig. 2 is a side view of the assembled light-duty triple metal circular tube buckling-constrained support energy dissipator provided by the utility model

Fig. 3 is a top view of the core stress tube of the light triple metal circular tube buckling restraint support energy dissipation device provided by the utility model

Fig. 4 is a side view of the core stress tube of the light triple metal circular tube buckling restraint support energy dissipation device provided by the utility model

Fig. 5 is a top view of the restraint tube and filling slats in the buckling-constrained support energy dissipator of the light-duty triple metal circular tube provided by the utility model

Fig. 6 is a side view of the inner constraint tube and filling slats of the light triple metal circular tube buckling restraint support energy dissipation device provided by the utility model

Figure 7 is the A-A section of Figure 1

Figure 8 is the B-B section of Figure 1

Fig. 9 is an exploded view of the middle part of the buckling-constrained support energy dissipator provided by the utility model (not including the end connectors)

Figure 10 is a schematic diagram of the assembled appearance of the buckling-constrained support energy dissipator provided by the utility model.

Fig. 11 is a schematic diagram of the assembly process of the buckling-constrained support energy dissipator provided by the utility model for the light triple metal circular tube

Detailed ways

This section describes in detail the specific implementation of the utility model in conjunction with the accompanying drawings

1. The buckling-restrained support energy dissipator of light-duty triple metal circular tube is mainly composed of three metal circular tubes, that is, the inner restraint tube 1, the core stress tube 2 and the outer restraint tube 3 from the inside to the outside. The core force-bearing tube is the core force-bearing part of the energy dissipator, and the inner and outer restraint tubes constitute the buckling restraint part of the energy dissipator. The core stress pipe is made of Q235B steel with good ductility, low yield steel or other metal materials with good ductility, while the inner and outer restraint pipes are generally made of steel pipes. The three metal round pipes adopt the positioning bolt 5 arranged at one end to fix relative positions. The buckling-constrained support energy dissipator of the light triple metal circular tube is manufactured by machining, and the mutual dimensional accuracy can be well controlled. At the same time, the main material is metal, and the discreteness of the material performance is small, which can ensure its stable performance. ;

2. The core load-bearing tube of the light-duty triple metal circular tube buckling-constrained support energy dissipator can be divided into a constrained yielding section L0, a constrained non-yielding section L1 and an unconstrained non-yielding section L2, in which parts of the L0 and L1 areas are constrained , Outer constraint tube, and the section of the constraint yield section L0 is provided with a long groove 202, the purpose of the slot is to reduce the force bearing area of the constraint yield section, so that the section of this part first enters the yield stage when bearing the axial force. In the accompanying drawings of this specification, the energy dissipator with two long slots in the core force pipe is taken as an example to illustrate its principle, but the actual implementation of the utility model may include more symmetrically distributed long slots;

3. In order to reduce the degree of stress concentration in the region of the non-yielding section L1 constrained by the end, a stress diversion hole 201 is provided. The position of the stress diversion hole 201 is in the center of each stressed slat, and in the constrained non-yielding section, and one at each end. The setting of the diversion hole 201 can make the stress in the restrained yielding section L0 be transferred to the restrained non-yielding section L1, and the stress distribution in the restrained non-yielding section L1 can be properly shunted, so that the stress distribution in L1 tends to be more even, so as to ensure that the stress in this area is always in the Lower level without entering into yield state, protecting the constrained non-yielding section L1 and the unconstrained non-yielding section L2, and making the connection between L2 and the end connecting plate more reliable;

4. The filling slats 6 are fixed on the outer surface of the inner restraint tube 1 by strong structural glue or other methods, and its position corresponds to the long groove 202 of the core stress tube 2, and its width is slightly smaller than the width of 202 . The role of the filler slats is to prevent the core stress tube from deforming along the tangential direction of the circular tube. Especially after the core stress tube yields under compression, due to the decrease of the tangent modulus of the core metal, the bending stiffness drops sharply, and the buckling along the radial direction is limited by the inner and outer restraint tubes, the core stress tube may produce tangential deformation. Deformation, at this time, the filling slats can provide support for the core stress tube by relying on the rigidity of the inner restraint tube;

5. A positioning hole 501 is opened at the same position of the core stress tube 2 and one end of the inner constraint tube 1 and the outer constraint tube 3, and the positioning bolt 5 is penetrated after the production is completed to ensure the relative position of the triple metal circular tube. The position of the positioning hole 501 should be relative to the top of the long groove of the core stress tube, and be within the range of the constrained non-yielding section L1;

6. The end connectors 4 are arranged at both ends of the core load-bearing pipe 2, and can be connected by butt welds or fillet welds.

7. The gap between the core stress tube 2 and the inner restraint tube 1 and outer restraint tube 3, as well as the gap between the long groove 202 and the side surface of the filler slat 6 should be as small as possible under the condition of manufacturing permit, which can ensure the core The stressed tube only undergoes high-order buckling when it is compressed, thus exerting a stable energy dissipation capacity. The existence of these gaps also provides space for the lateral expansion of the core tube due to the Poisson effect when it is under pressure. The surface of the above-mentioned gap can also be coated with a low-friction coating or a non-bonding coating to further reduce the friction generated during contact and prevent corrosion during long-term use.

Manufacturing process of the present utility model:

1) According to the design parameters, a long slot 202 is opened in the middle of the core stress tube 2, and a stress diversion hole 201 is opened at the center of both ends of the stress-bearing slats constraining the non-yielding section. Open positioning hole 501;

2) Set a positioning hole 501 at the corresponding position of the inner restraint pipe 1, and penetrate the inner restraint pipe 1 into the core force-bearing pipe 2, determine the relative position and temporarily fix it;

3) Make filling slats 6 with appropriate shapes and sizes, and fix the relative positions on the surface of the inner restraint tube 1 with strong structural glue or other methods;

4), set up a positioning hole 501 at the corresponding position of the outer constraint tube 3, and penetrate the assembled parts, and fix the relative position with the positioning bolt 5;

5), the connecting parts 4 at both ends are connected to the two ends of the core stress tube by welding;

6) The surfaces of the above components can be coated with low-friction coatings or non-bonding coatings before assembly to reduce contact friction when stressed.

Claims (4)

1. A light-duty triple metal circular tube buckling-constrained support energy dissipator, which consists of core force-bearing parts, buckling-constrained parts, positioning bolts (5) and end connectors (4), characterized in that: the core The force component is the core stress tube (2), the buckling constraint components are the inner constraint tube (1), the outer constraint tube (3) and the filling slats (6), and the core force tube (2) is set Between the inner restraint tube (1) and the outer restraint tube (3), and its length is greater than the length of the inner restraint tube (1) and the outer restraint tube (3), in the core force-bearing tube (2), the inner One end of the constraint tube (1) and the outer constraint tube (3) is fixed with a positioning bolt (5), and at least two long grooves ( 202), the end connectors (4) are arranged at the two ends of the core stress tube (2), and the filler slats (6) are fixed on the outer surface of the inner constraint tube (1), the filler The shape of the lath (6) is adapted to the long groove (202). 2. The light-duty triple metal circular tube buckling-constrained support energy dissipator according to claim 1, characterized in that: a diversion hole (201) is provided on the core stress-bearing tube (2), and the diversion hole (201) is The hole (201) is located outside the long slot (202). 3. The light-duty triple metal circular tube buckling-constrained support energy dissipator according to claim 1 or 2, characterized in that: through the core stress tube (2), the inner constraint tube (1) and the outer constraint tube (3) Set a positioning hole (501) at the same position at one end, and penetrate the positioning bolt (5) to determine the installation position between the triple metal tubes. On the core force-bearing tube (2), the positioning hole is located outside the long slot (202) , and on the central extension line of the long slot. 4. The light-duty triple metal circular tube buckling restraint support energy dissipator according to claim 1, characterized in that: the core stress tube (2) is made of metal, and the inner constraint tube (1) is made of Made of metal, the outer restraint tube (3) is made of metal, and the filling lath (6) is made of metal.

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