CN-121976606-A - Combined flange corrugated web door type rigid frame

CN121976606ACN 121976606 ACN121976606 ACN 121976606ACN-121976606-A

Abstract

The application discloses a combined flange corrugated web portal rigid frame, and aims to solve the problems of poor stability of a pressed flange of the existing rigid frame and low stress matching property of materials. The steel frame beam comprises a first flange, a second flange and a corrugated web, wherein the first flange is a steel pipe filled with concrete, and the second flange is a high-strength steel plate. The first flange is arranged on the compression side, and the second flange is arranged on the tension side. The outer rigid frame column compression control side wings adopt steel pipe combination flanges, and the inner rigid frame column is configured into double-side combination flanges. Through the scheme, the flange stability is obviously improved by utilizing the constraint effect of the concrete filled steel tube, the shearing-resistant advantage of the corrugated web is combined, the accurate matching of the material performance is realized, the structural safety redundancy is improved, the steel consumption is effectively reduced, and the comprehensive construction cost of a building is saved.

Inventors

CHEN MING
WU YICHAO
LIU QIANG
LI XIAN

Assignees

上海欧本钢结构有限公司
南通欧本建筑科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260312

Claims (10)

1. The combined flange corrugated web portal rigid frame comprises at least two rigid frame columns and rigid frame beams connected between the two rigid frame columns, wherein the rigid frame beams are connected with the rigid frame columns through end plate bolts; the first flange is a steel-concrete combined flange and comprises a steel pipe and concrete filled in the steel pipe, and the second flange is a steel plate flange; Wherein at any section of the rigid frame beam, the first flange is arranged on a main compression fiber side corresponding to a design load bending moment envelope diagram, and the second flange is arranged on a main tension fiber side.
2. The composite flange corrugated web portal frame as claimed in claim 1, wherein the frame beam further comprises a corrugated web H-shaped steel beam, and adjacent corrugated web H-shaped steel beams and the steel-concrete composite beam are connected through end plates and high-strength bolts to form a sectional composite section beam.
3. The composite flange corrugated web portal frame of claim 1, wherein the frame columns include an outboard frame column and an inboard frame column distributed in a transverse direction of the building; And the end part of the steel-concrete composite beam is fixedly arranged at the inner side wall of the column section through an end plate.
4. The composite flange corrugated web portal rigid frame as claimed in claim 3, wherein the inner side wall of the outer rigid frame column is provided with a column composite flange for supporting the end plate of the steel-concrete composite beam, the column composite flange is a steel pipe column arranged along the length direction of the outer rigid frame column, and the interior of the steel pipe column is filled with concrete.
5. A composite flange corrugated web portal rigid frame as claimed in claim 3, wherein the inner rigid frame column is mainly subjected to axial compressive stress under the action of design load, and fibers at two sides of the section of the inner rigid frame column are in a compressed state; in the steel-concrete composite beam connected with the inner rigid frame column, the first flange is fixed with the opposite sides of the inner rigid frame column through connecting plates to form a double-side composite flange structure.
6. The composite flange corrugated web portal frame as claimed in any one of claims 1 to 5, wherein in the high shear section of the frame beam, the corrugated web of the frame beam adopts one of the following reinforcing structures: (1) The thickness of the corrugated web is locally increased along the length direction of the beam; (2) The corrugated web comprises at least two corrugated steel plates which are arranged at intervals in parallel along the width direction of the section, and the at least two corrugated steel plates are connected between the first flange and the second flange together to form a multi-web combined section.
7. The composite flange corrugated web portal frame as claimed in any one of claims 1 to 5, wherein a positive bending moment region is located at a column top section of the rigid frame column, and a beam end section or a midspan section of the rigid frame beam; Correspondingly, the first flanges are alternately arranged on the upper side or the lower side of the rigid frame beam along the length direction of the rigid frame beam according to the change of the bending moment sign.
8. The composite flange corrugated web portal rigid frame as claimed in any one of claims 1 to 5, wherein the steel pipe is a closed section member, and the section shape thereof comprises regular polygon, rectangle, trapezoid, circle or ellipse; and the strength grade of the concrete filled in the steel pipe is not lower than C30, and the cavity inside the steel pipe is filled.
9. The composite flange corrugated web portal frame of claim 1, wherein, The corrugated web is a broken line type corrugated steel plate or a sine type corrugated steel plate; The thickness of the corrugated web is configured to meet the requirements of structural shear bearing capacity and stability under the condition that no transverse stiffening rib is arranged or stiffening ribs are arranged only in local areas of the nodes.
10. The composite flange corrugated web portal rigid frame as claimed in claim 1, wherein the steel-concrete composite beam is used for a crane beam when the composite flange corrugated web portal rigid frame is applied to a condition with the crane beam; The first flange is used for bearing the compressive stress under the action of crane load, and the second flange is used for bearing the tensile stress under the action of crane load.

Description

Combined flange corrugated web door type rigid frame Technical Field The application relates to the technical field of steel structure buildings, in particular to a door type rigid frame with a combined flange corrugated web. Background The portal rigid frame structure is widely applied to industrial plants and public buildings, and the prior art scheme mainly adopts solid web type or variable cross section welding H-shaped steel members. However, the above prior art has the following technical drawbacks in practical applications: First, the local stability control means of the compression flange is single. In order to meet the limit value of the width-to-thickness ratio of the plate to prevent local buckling, the prior design is often forced to increase the thickness of the flange plate, so that the strength performance of the steel cannot be fully exerted, and the waste of materials and the self weight of the structure are obviously increased. Secondly, the shear stability of the web depends on constructional measures. The high and thin web is easy to be unstable under the shearing force, and the prior art is generally reinforced by thickening the web or adding a large number of stiffening ribs. The former increases the steel consumption, and the latter leads to complex node structure, increased welding workload and increased manufacturing cost, and fails to fundamentally improve the shear resistance of the web from the aspect of section mechanics. Thirdly, the distribution of the section materials is not matched with the stress characteristics. The existing structure mostly adopts full-section homogeneous steel, and is not optimally designed for the asymmetry of section stress distribution under the action of bending moment. The excellent compressive property of concrete is not introduced into the upper compression zone to replace part of steel, so that the high-cost steel bears the compressive load which can be efficiently borne by the concrete, and structural dislocation exists between the material function and the stress requirement. Fourth, the structural economy is to be improved. Because the high-price steel is excessively relied on to bear the functions of bending and stabilizing, the stress system reconstruction based on material performance complementation and cost difference is lacking, and the further optimization of the overall economy of the structure is limited. In summary, the existing portal rigid frame structure has shortcomings in the aspects of stability control of a pressed area, shearing efficiency of a web and collaborative work of multiple materials, and a novel structural system capable of specifically optimizing the performance of a pressed main control area and realizing complementary advantages of steel-mixed materials is needed to be provided. Disclosure of Invention The embodiment of the application provides a combined flange corrugated web portal rigid frame, which solves the technical limitations of the existing portal rigid frame in the aspects of local stability of a pressed flange, web shearing resistance and material stress performance matching through reconstruction of a section structure of a pressed main control area and accurate collaborative configuration of heterogeneous materials. The combined flange corrugated web portal rigid frame comprises at least two rigid frame columns and rigid frame beams connected between the two rigid frame columns, wherein the rigid frame beams are connected with the rigid frame columns through end plate bolts; the rigid frame beam comprises a steel-concrete composite beam arranged along the length direction of the rigid frame beam, wherein the steel-concrete composite beam comprises a first flange, a second flange and a corrugated web; The first flange is a steel-concrete combined flange and comprises a steel pipe and concrete filled in the steel pipe, and the second flange is a steel plate flange; the first flange is arranged on the main compression fiber side corresponding to the designed load bending moment envelope diagram at any section of the rigid frame beam, and the second flange is arranged on the main tension fiber side. The rigid frame beam further comprises corrugated web plate H-shaped steel beams, and the adjacent corrugated web plate H-shaped steel beams are connected with the steel-concrete combined beam through end plates and high-strength bolts to form a sectional combined section beam. Further, the rigid frame columns comprise an outer rigid frame column and an inner rigid frame column which are distributed along the transverse direction of the building; The end part of the steel-concrete composite beam is fixedly arranged at the inner side wall of the column section through an end plate; further, the inner side wall of the outer rigid frame column is provided with a column combination flange for supporting an end plate of the steel-concrete combination beam, the column combination flange is a steel pipe column arr