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CN-121992959-A - Low-cost steel structure beam column node repairing structure and construction method

CN121992959ACN 121992959 ACN121992959 ACN 121992959ACN-121992959-A

Abstract

The invention provides a low-cost steel structure beam column node repairing structure and a construction method, and relates to the technical field of building steel structures. Compared with the traditional welded node, the method does not need complex procedures such as cutting, polishing, repair welding and the like after earthquake, the repair time of a single node can be controlled within 1.5 hours, and the repair cost is reduced by more than 90 percent. Meanwhile, the visual damage indicator enables non-professional staff to accurately judge whether replacement is needed or not, and the visual damage indicator is suitable for emergency rescue scenes.

Inventors

  • XU GUOPING
  • Su xining
  • KE MEIFU
  • ZHAO GANGQIANG

Assignees

  • 新疆展鸿图钢结构有限责任公司

Dates

Publication Date
20260508
Application Date
20260227

Claims (10)

  1. 1. The low-cost steel structure beam column node repairing structure comprises an H-shaped steel column (1) and an H-shaped steel beam (2), and is characterized in that: Further comprises: At least one replaceable energy consuming connection (3) which is simultaneously detachably connected to the H-beam (2) and the H-beam (1) and is configured for plastic deformation to dissipate energy in a concentrated manner under the action of an earthquake while protecting the main structures of the H-beam (2) and the H-beam (1) from being in an elastic state; And At least one visual damage indicator integrated on the energy consuming connector (3) for generating an irreversible visual change when the energy consuming connector (3) is plastically deformed to a predetermined extent.
  2. 2. The low-cost steel structure beam column node repairing structure according to claim 1, wherein the energy-consuming connecting piece (3) comprises: a long arm (32) for connecting with the web of the H-beam (2); a short arm part (31) for connecting with the flange of the H-shaped steel column (1); and, weakening structures are provided on the long arm portions (32) for concentrated plastic deformation.
  3. 3. A low cost steel structure beam column joint repair structure according to claim 2, wherein said weakened structure is a weakened section (35) provided in the middle of said long arm portion (32).
  4. 4. A low cost steel structure beam column node repair structure according to claim 3, wherein said visual damage indicator is a thermochromic coating applied on the surface of said energy consuming connector (3).
  5. 5. The low-cost steel structure beam column joint repairing structure according to claim 4, further comprising at least one L-shaped flange connecting piece (4) for connecting the flange of the H-shaped steel beam (2) and the flange of the H-shaped steel column (1).
  6. 6. A low cost steel structure beam column node repairing structure according to claim 5, wherein the flange connecting piece (4) comprises a vertical end (41) and a horizontal end (43), a U-shaped section (42) is arranged at the joint of the vertical end (41) and the horizontal end (43), and the U-shaped section (42) is positioned in an anti-seismic gap between the end of the H-shaped steel beam (2) and the H-shaped steel column (1).
  7. 7. The low-cost steel structure beam column node repairing structure according to claim 6, wherein the assembly holes connected with the long arm parts (32) on the web plate of the H-shaped steel beam (2) are locking oblong holes (21); the long arm part (32) is provided with a safety through hole (34), and the web plate of the H-shaped steel beam (2) is provided with a safety oblong hole (22); a safety pin (6) passes through the safety through hole (34) and the safety oblong hole (22); Under normal use condition, the bolt connecting the long arm part (32) and the H-shaped steel beam (2) is positioned at one end of the locking slotted hole (21) close to the H-shaped steel column (1), and the safety pin (6) is positioned at one end of the safety slotted hole (22) far away from the H-shaped steel column (1).
  8. 8. A low cost steel structure beam column node repair structure according to any one of claims 5 to 7, further comprising at least one L-shaped reinforcing plate (5), said reinforcing plate (5) being attached and detachably attached to the outside of said flange connection (4).
  9. 9. The low-cost steel structure beam column node repairing structure according to claim 8, wherein an arc-shaped section (52) is arranged at the L-shaped turning part of the reinforcing plate (5), and the arc-shaped section (52) is used for dispersing stress concentration of the reinforcing plate (5) under the action of reciprocating load.
  10. 10. The construction method of the low-cost steel structure beam column node repairing structure is applied to the low-cost steel structure beam column node repairing structure disclosed in claim 9, and is characterized by comprising the following steps: step one, factory prefabrication and precision control In a factory, blanking the energy consumption connecting piece (3), the flange connecting piece (4) and the reinforcing plate (5) by utilizing numerical control equipment; The middle part of the long arm part (32) of the energy consumption connecting piece (3) is processed to form a weakening section (35) serving as a weakening structure, and a thermochromic coating is coated on the surface of the energy consumption connecting piece (3); Adopting a numerical control drilling machine to process bolt holes (33) on the long arm part (32), the short arm part (31), the vertical end (41) and the horizontal end (43) of the flange connecting piece (4) and the reinforcing plate (5), processing safe through holes (34) on the long arm part (32), and correspondingly processing locking slotted holes (21) and safe slotted holes (22) on the web plate of the H-shaped steel beam (2); Controlling the critical dimension tolerance of all the machined parts within +/-1.0 mm, and ensuring that the position degree of the hole site meets the design requirement; step two, pre-assembling in workshops and calibrating initial state In a factory workshop, a long arm part (32) of the energy consumption connecting piece (3) is pre-connected with a web plate of the H-shaped steel beam (2) through a bolt, and a short arm part (31) is pre-connected with a flange of the H-shaped steel column (1) through a bolt; the vertical end (41) of the flange connecting piece (4) is pre-connected with the flange of the H-shaped steel column (1) through a bolt, and the horizontal end (43) is pre-connected with the flange of the H-shaped steel beam (2) through a bolt; Attaching the reinforcing plate (5) to the outer side of the flange connector (4) and pre-connecting the reinforcing plate; Inserting a safety pin (6) into the safety through hole (34) and the safety oblong hole (22), and adjusting the positions of bolts to enable the bolts connecting the long arm part (32) and the H-shaped steel beam (2) to be positioned at one end of the locking oblong hole (21) close to the H-shaped steel column (1), and enable the safety pin (6) to be positioned at one end of the safety oblong hole (22) far away from the H-shaped steel column (1); Recording and archiving initial state parameters including initial position coordinates of a bolt connecting the long arm part (32) and the H-shaped steel beam (2) in the locking oblong hole (21), initial position coordinates of the safety pin (6) in the safety oblong hole (22), initial color and chromaticity values of the thermochromic coating, and complete state image data of the safety pin (6); numbering, disassembling and packaging all parts after the pre-assembly is completed, and preparing for shipping; step three, field installation Conveying the prefabricated H-shaped steel column (1), the H-shaped steel beam (2) and each connecting piece to a construction site; The H-shaped steel column (1) is firstly installed in place, and then the H-shaped steel beam (2) is hoisted to a designed position; The long arm part (32) of the energy consumption connecting piece (3) is connected with the web plate of the H-shaped steel beam (2) through a bolt, and the short arm part (31) is connected with the flange of the H-shaped steel column (1) through a bolt; The vertical end (41) of the flange connecting piece (4) is connected with the flange of the H-shaped steel column (1) through a bolt, the horizontal end (43) is connected with the flange of the H-shaped steel beam (2) through a bolt, and the U-shaped section (42) of the horizontal end is positioned in an anti-seismic gap between the end part of the H-shaped steel beam (2) and the H-shaped steel column (1); attaching the reinforcing plate (5) to the outer side of the flange connecting piece (4) and fastening the reinforcing plate by bolts; Inserting a safety pin (6) into the safety through hole (34) and the safety oblong hole (22), positioning a bolt connecting the long arm part (32) and the H-shaped steel beam (2) at one end of the locking oblong hole (21) close to the H-shaped steel column (1) according to design requirements, and positioning the safety pin (6) at one end of the safety oblong hole (22) far away from the H-shaped steel column (1); Finishing final screwing of all bolts, and delivering the bolts for use after the bolts are qualified by inspection; Step four, post-earthquake damage identification and data acquisition After the earthquake occurs, on-site personnel check the nodes and collect the following data: Visually inspecting the thermochromic coating on the surface of the energy consumption connecting piece (3), and recording the color change area and the degree of color change; measuring and recording final position coordinates of the bolt in the locking slotted hole (21), and calculating the sliding distance of the locking slotted hole relative to the initial position; Measuring and recording final position coordinates of the safety pin (6) in the safety oblong hole (22), and observing whether the safety pin (6) is bent or broken; If the safety pin (6) breaks, recording the form and position of the broken surface; observing whether a visible residual deformation of the weakened section (35) of the dissipative connection (3) occurs; Step five, vibration intensity grading evaluation According to the data collected in the fourth step, the seismic vibration intensity is evaluated according to the following grading standard: slight vibration, namely only the thermochromic coating is subjected to local color change, the bolt slides in the locking oblong hole (21) for a distance less than 1/3 of the hole length, and the safety pin (6) is free from deformation; moderate vibration, namely completely changing color of the thermochromic coating, sliding the bolt in the locking slotted hole (21) for a distance of 1/3 to 2/3 of the hole length, and bending but not breaking the safety pin (6); Severe vibration, namely covering the whole area of the weakening section (35) by the thermochromic coating, expanding the thermochromic coating to the area outside the weakening section (35), sliding the bolt in the locking oblong hole (21) by a distance exceeding 2/3 of the hole length or reaching the hole end, and breaking the safety pin (6); The extremely severe vibration is that the bolt slides to the end part of the locking oblong hole (21) and generates hole wall pressure-bearing deformation, the safety pin (6) is completely broken, and the weakening section (35) of the energy-consumption connecting piece (3) generates visible residual deformation; step six, quick repair and replacement Repairing the nodes reaching the medium vibration level and above according to the evaluation result of the step five: Removing bolts connected with the energy consumption connecting pieces (3), and removing the energy consumption connecting pieces (3) which are subjected to yielding; checking the state of the safety pin (6), wherein the safety pin (6) is reserved if the safety pin is not broken or is not obviously deformed, and the safety pin (6) is replaced together if the safety pin is broken or deformed; Installing a new energy consumption connecting piece (3) with the same specification, connecting a long arm part (32) with a web plate of an H-shaped steel beam (2) through a bolt, and connecting a short arm part (31) with a flange of the H-shaped steel column (1) through a bolt; Positioning a bolt at one end of the locking oblong hole (21) close to the H-shaped steel column (1) according to design requirements, inserting a new or original safety pin (6) into the safety through hole (34) and the safety oblong hole (22), and positioning the safety oblong hole (22) at one end far away from the H-shaped steel column (1); After the bolt is finally screwed and is qualified by inspection, the structure function is recovered; Step seven, data summarization and statistical analysis Summarizing vibration intensity grading data of a plurality of nodes in a building group to form a statistical report, including: The spatial distribution diagram of the vibration intensity of each node reflects the attenuation rule of the earthquake motion in a building group or a region; according to the breaking quantity of the safety pins (6) and the sliding distance of the bolts, reversely calculating the approximate range of the peak value of the earthquake acceleration; and taking the statistical analysis result as basic data for verification and optimization of subsequent anti-seismic design.

Description

Low-cost steel structure beam column node repairing structure and construction method Technical Field The invention relates to the technical field of building steel structures, in particular to a low-cost steel structure beam column node repairing structure and a construction method. Background The steel structure has the advantages of high strength, light dead weight, good earthquake resistance, high construction speed, low foundation cost, small occupied area, high industrialization degree, attractive appearance and the like, and is environment-friendly and reusable compared with a concrete structure, and is also a structure easy to industrialize. The connection node between the beam and the column is a key component for ensuring the cooperative work of the beam and the column to form a structural whole. At present, the steel structure beam column joint mainly adopts a full-welding connection or bolt welding mixed connection mode. The all-welded joint connects the beam flange and the web with the column flange through field welding, and has the advantages of high rigidity and good integrity. However, the prior art has the following problems that firstly, after a welded node is damaged under the action of an earthquake, plastic deformation is generally distributed in a welding line and a heat affected zone, the damage distribution is difficult to develop in a concentrated mode in a specific area, so that the damage distribution is dispersed and the damage degree is difficult to evaluate, secondly, the repairing after the earthquake is required to be performed by complex procedures such as cutting, polishing, repair welding, flaw detection and the like, the repairing period is long, the cost is high, the performance of the repaired node is difficult to ensure, thirdly, the welded node is lack of an intuitive damage recognition means, the flaw detection is required to be performed by special detection equipment after the earthquake, the node state cannot be judged quickly, fourth, the quantitative corresponding relation between the damage degree of the node and the earthquake action strength is not easy to reversely push the earthquake parameters according to the node state, fifth, the welding node is likely to be broken in brittle under the action of the extreme earthquake, the bearing capacity is lost once the failure is short, the backup safety mechanism is not needed, the on-site welding operation has high technical requirements on constructors, the welding quality is greatly influenced by environmental factors, the quality stability is difficult to control, and the post-node data cannot be collected and analyzed in a system, and the actual-measured data support cannot be provided for the subsequent earthquake-proof design. Therefore, the beam column node repairing structure with the low cost and the construction method thereof are provided. Disclosure of Invention In order to solve the problems in the background technology, the invention is realized by the following technical scheme that the low-cost steel structure beam column node repairing structure comprises an H-shaped steel column and an H-shaped steel beam, and further comprises: At least one replaceable energy consuming connector detachably connected to the H-beam and the H-beam at the same time and configured to concentrate plastic deformation to dissipate energy under the effect of an earthquake while protecting the main structures of the H-beam and the H-beam in an elastic state; And At least one visual damage indicator integrated on the energy consuming connector for generating an irreversible visual change when the energy consuming connector is plastically deformed to a predetermined extent. Further, the energy consuming connector includes: A long arm for connecting with the web of the H-beam; A short arm part for connecting with the flange of the H-shaped steel column; And the long arm part is provided with a weakening structure for intensively generating plastic deformation. Further, the weakening structure is a weakening section provided in the middle of the long arm portion. Further, the visual damage indicator is a thermochromic coating applied to the surface of the power consuming connector. Further, the flange connector also comprises at least one L-shaped flange connector for connecting the flange of the H-shaped steel beam and the flange of the H-shaped steel column. Further, the flange connecting piece comprises a vertical end and a horizontal end, a U-shaped section is arranged at the joint of the vertical end and the horizontal end, and the U-shaped section is positioned in an anti-seismic gap between the end part of the H-shaped steel beam and the H-shaped steel column. Further, the assembly holes connected with the long arm parts on the web plate of the H-shaped steel beam are locking slotted holes; the long arm part is provided with a safety through hole, and the web plate of the H-shaped steel beam is provided with a safety