CN203701299U - Steel structure conducive to reducing the stress of steel members - Google Patents

Abstract

The steel structure beneficial to reducing the stress of the steel member comprises a section steel body; the section steel body is provided with an upper part, a middle part and a lower part; an external thread joint and an internal thread joint are respectively arranged at one end of the upper part and one end of the lower part of the section steel, and an external thread joint and an internal thread joint are respectively arranged at two ends of the middle part of the section steel; the utility model provides a steel structure which is beneficial to reducing the stress of a steel member, which greatly reduces the stress of each stress concentration area on the section steel body by adding a support plate and a wing plate, and avoids the deformation of the section steel body caused by too large stress of a certain stress concentration area; and divide into the triplex with the shaped steel body, adopt internal thread joint and external thread joint fastening connection each other respectively, through reducing the tooth height of the first external screw thread of neighbouring second circular bead, can effectively reduce the stress peak value of first external screw thread, with the corresponding cooperation of internal thread joint and external thread joint, can make the atress more even, increase of service life improves the safe and reliable degree of steel member.

Description

Steel structure conducive to reducing the stress of steel members

technical field

The model relates to a building material component, in particular to a steel structure which is beneficial to reduce the stress of the steel component.

Background technique

The steel members in conventional building materials mostly use the method of keeping the cross-sectional size constant along the length direction, and the deformation is small and the rigidity is large when the axial force is applied. When the steel member is in an elastic working state and under the action of axial force, its axial deformation is proportional to the force. Because of its small deformation, when the expansion or contraction deformation of the structure on both sides of individual steel member nodes is large, it will cause The steel structure produces large internal stress and stress concentration areas, which reduces the safety reserve of steel components or the hidden danger of steel component damage. Therefore, this type of steel components has defects in axial deformation.

Contents of the invention

In order to overcome the above problems, the utility model provides a steel structure that can reduce the stress concentration area on the steel component and improve the safety and reliability of the steel component.

In order to achieve the above object, the technical solution provided by the utility model is:

A steel structure conducive to reducing the stress of steel members, including a steel body; the steel body is provided with upper, middle and lower parts; one end of the upper part and one end of the lower part of the steel are respectively provided with external thread joints and internal thread joints The two ends of the middle part of the shaped steel are respectively provided with external threaded joints and internal threaded joints; Placed in the internally threaded joint of the lower part of the section steel; both the externally threaded joint and the internally threaded joint are provided with at least a first thread segment and a second thread segment, the tooth height of the first thread segment is lower than the tooth height of the second thread segment, The threaded section of the internally threaded joint matches the externally threaded joint; there are also support plates and wing plates at the internally threaded joints of the middle part and the lower part of the steel body; one end of the support plate is fixed on the internally threaded joint, and the other end is inclined Extending downward, the distance between one end of the support plate fixed to the internally threaded joint and the steel body is smaller than the distance between the other end of the support plate and the steel body; one side of the wing plate is welded to the inner side of the support plate, and the other side is welded to the steel body .

The externally threaded joint is provided with a radially outward second shoulder and a radially outward second twisted shoulder, and the internally threaded joint matches the second shoulder and the second twisted shoulder of the externally threaded joint A first shoulder and a first twisted shoulder; at least a first external thread segment and a second external thread segment are disposed between the second shoulder and the second twisted shoulder; between the first shoulder and the first twisted shoulder There are at least a first internal thread segment and a second internal thread segment between them.

A first thread segment, a second thread segment, a third thread segment and a fourth thread segment are provided between the first shoulder and the first twist shoulder; the first thread segment, the second thread segment, the first thread segment The tooth height ratio of the third thread segment and the fourth thread segment is 1:2:3:4; the thread segment of the internal thread joint matches the thread segment of the external thread joint.

The benefits of the above technical solution are:

1. This new model provides a steel structure that is conducive to reducing the stress of steel members. By adding support plates and wing plates, the stress in each stress concentration area on the steel body is greatly reduced, and the stress in a certain stress concentration area is avoided. If the steel body is too large, the shape steel body will be deformed; the shape steel body is divided into three parts, and the internal thread joint and the external thread joint are used to fasten and connect each other. By reducing the tooth height of the first external thread adjacent to the second shoulder, it can be effectively reduced. The stress peak value of the first external thread, matching the internal thread joint and the external thread joint correspondingly, can make the stress more uniform, prolong the service life, and improve the safety and reliability of the steel member.

2. There are shoulders and torsion shoulders on the inner and outer threaded joints of this new type. When the three parts of the section steel are connected through the threaded joints, the shoulders of the outer threaded joints and the torsional shoulders are respectively against the platform of the inner threaded joint. On the shoulder and the torsion shoulder, part of the stress can be transmitted to the support plate and the wing plate fixedly connected with the internal thread joint, which plays a role in slowing down the stress of the steel body and effectively improves the structural stability of the new model.

3. The tooth height ratio of the four threaded sections of the new externally threaded joint is 1:2:3:4, and the tooth height ratio of the four threaded sections of the internally threaded joint matches the threaded section of the externally threaded joint. When the axial force is applied, the steel body can be evenly stressed, preventing a certain part of the steel from being deformed due to a large force, which will affect the safety and reliability of the steel member.

Below in conjunction with accompanying drawing and specific embodiment the present invention will be further described.

Description of drawings

Fig. 1 is the partial structural representation of the present invention;

Fig. 2 is an enlarged view of part A in Fig. 1 .

Detailed ways

A steel structure conducive to reducing the stress of steel members, which includes a steel body 1, the steel body 1 is provided with a plurality of wing plates 2 along the length direction, the wing plates 2 are arranged, the load transmission path is increased, and the stress of the steel body 1 is reduced peak. After testing, when the steel body 1 bears the axial force, the stress concentration at the plane intersection point of the steel body and the member applying the axial force to the steel body is dispersed to form a narrow and long belt-shaped stress area, and the peak stress is much smaller than that without additional wings. The value of plate 2, the stress peak calculation data is reduced by about 50%, which greatly improves the safety and reliability of the structure.

The profiled steel body 1 is a round steel pipe, the diameter of the profiled steel body 1 is 351mm, and the wall thickness is 12mm; the profiled steel body 1 is composed of upper, middle and lower sections of profiled steel connected by threaded joints; the upper part 100 of the profiled steel and one end of the lower part An externally threaded joint 3 and an internally threaded joint 4 are respectively provided, and one end where the middle part 101 of the shaped steel is connected to the upper part 100 of the shaped steel is provided with an internally threaded joint 4, and the other end is provided with an externally threaded joint 3 to connect with the internally threaded joint 4 of the lower part of the shaped steel; in:

The internally threaded joint 4 is provided with a radially outward first shoulder 40 and a radially inward first twisted shoulder 41; the first shoulder 40 and the first twisted shoulder 41 are fixedly connected by an internal thread segment ; The externally threaded joint 3 is provided with a radially outward second shoulder 30 and a radially outward second twisted shoulder 31, and the upper part 100 of the shaped steel is provided with one end of the externally threaded joint 3 embedded in the shaped steel In the internally threaded joint 4 of part 101, one end of the middle part 101 of the shaped steel with the externally threaded joint 3 is embedded in the internally threaded joint 4 of the lower part of the shaped steel, so that the second twisted shoulder 31 is in close contact with the first twisted shoulder 41, and the second twisted shoulder 31 is in close contact with the first twisted shoulder 41. The two shoulders 30 are in contact with the first shoulder 40; the externally threaded joint 3 is corresponding to the second shoulder 30 and the second torsion shoulder 31, and an axially extending external thread segment is arranged between the external thread segment and the internal thread segment. match.

The three parts of the steel body are tightly connected by the external thread section and the internal thread section in the external thread joint 3 and the internal thread joint 4 respectively. The external thread of the external thread joint 3 includes a first external thread 32, a second external thread 33, a third external thread External thread 34 and fourth external thread 35, the first external thread 32 is adjacent to the second shoulder 30, the tooth height of the first external thread 32 is smaller than the tooth height of the remaining external threads on the externally threaded joint 3; the first external thread 32. The tooth height ratio of the second external thread 33, the third external thread 34 and the third external thread 35 is 1:2:3:4; the internal thread on the internal thread joint 4 and the external thread on the external thread joint 3 match.

By dividing the section steel body into three parts, the inner threaded joint 4 and the outer threaded joint 3 are fastened and connected to each other, and by reducing the tooth height of the first outer thread 32 adjacent to the second shoulder 30, the first outer thread can be effectively reduced. For the stress peak at 32, matching the internally threaded joint 4 with the externally threaded joint 3 can make the stress more uniform, prolong the service life, and reduce the use cost.

A support plate 5 is also provided at the middle part 101 of the profiled steel and the internally threaded joint 4 of the lower part. One end of the support plate 5 is fixed on the internally threaded joint 4 of the profiled steel body 1, and the other end extends downwards to be fixed on other components to support The distance between one end of the plate 5 fixedly connected with the shaped steel body 1 and the shaped steel body 1 is much smaller than the distance between the other end of the support plate 5 and the shaped steel body 1 . A wing plate 2 is arranged between the support plate 5 and the shaped steel body 1 , one side of the wing plate 2 is welded to the inner side of the support plate 5 , and the other side is welded to the outer side of the shaped steel body 1 .

The way of adding support plate 5 and wing plate 2 greatly reduces the stress of each stress concentration area on the steel body 1, avoiding the deformation of the steel body 1 caused by too much stress in a certain stress concentration area; in addition, if the steel body is reduced The thickness can also achieve the same effect. Therefore, this new type not only improves the safety and reliability of the steel structure, but also saves a lot of steel for the enterprise and reduces the cost.

Claims (3)

1. A steel structure conducive to reducing the stress of steel members, characterized in that: it includes a shaped steel body; the shaped steel body includes upper, middle and lower parts; one end of the upper part of the shaped steel and one end of the lower part are respectively provided with external threads Joints and internal threaded joints, the two ends of the middle part of the section steel are respectively equipped with external threaded joints and internal threaded joints; One end of the threaded joint is embedded in the internal threaded joint of the lower part of the section steel; both the external threaded joint and the internal threaded joint are provided with at least a first thread segment and a second thread segment, and the tooth height of the first thread segment is lower than that of the second thread The tooth height of the section, the threaded section of the internally threaded joint matches the externally threaded joint; there are also support plates and wing plates at the internally threaded joints of the middle part and the lower part of the steel body; one end of the support plate is fixed to the internally threaded joint , the other end extends obliquely downward, and the distance between one end of the support plate fixed to the internally threaded joint and the steel body is smaller than the distance between the other end of the support plate and the steel body; one side of the wing plate is welded to the inner side of the support plate, and the other side The edge is welded with the steel body. 2. The steel structure beneficial to the stress reduction of steel members according to claim 1, characterized in that: the externally threaded joint is provided with a radially outward second shoulder and a radially outward second torsion platform Shoulder, the first shoulder and the first twisted shoulder on the internally threaded joint match the second shoulder and the second twisted shoulder of the externally threaded joint; between the second shoulder and the second twisted shoulder, at least There are a first external thread segment and a second external thread segment; at least a first internal thread segment and a second internal thread segment are provided between the first shoulder and the first torsion shoulder. 3. The steel structure that is conducive to reducing the stress of steel members as claimed in claim 2, characterized in that: between the first shoulder and the first torsion shoulder, a first thread segment, a second thread segment, The third thread segment and the fourth thread segment; the tooth height ratio of the first thread segment, the second thread segment, the third thread segment and the fourth thread segment is 1:2:3:4; the internal thread joint The threaded section matches the threaded section of the male fitting.