Kou kouzou rombunshuu
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 1884-0329
PRINT ISSN: 1880-9928

Kou kouzou rombunshuu Vol. 25 (2018), No. 99

  • LOAD TRANSMISSION OF HIGH-STRENGTH BOLTED PATCH PLATE WITH ADHESIVE JOINT AT THE ENDS

    pp. 99_1-99_9

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_1

    In the repair method by high-strength bolted patch plate, the higher slip coefficient between patch plates and steel members is required. However, the quality control of roughness of surface on steel members is difficult on sites. In this study, a combination repair method of high-strength bolts and adhesive bonding is proposed. In order to clarify the effectiveness of proposed method, tensile tests were carried out. As the result of the tensile tests, it was found that the adhesive layer at the ends of patch plate can transfer the stress in main plate to patch plates. Additionally, it was clarified that the load transmission ratio of high-strength bolted joint and adhesive joint at the ends of patch plate.
    x

    Readers Who Read This Article Also Read

    1. Application of damage model based on void growth analysis to ductile crack growth simulation QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY Vol.37(2019), No.3
    2. Effects of HAZ softening on the strength and elongation of resistance spot-welded joints in high-strength steel sheet in an in-plane tensile test QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY Vol.34(2016), No.4
    3. Effect of heat affected zone microstructure behavior under cyclic loading on fatigue life of weld joint QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY Vol.36(2018), No.2
  • ESTIMATION OF FRACTURE STRENGTH OF WELDED JOINTS WITH WELD DEFECTS

    pp. 99_11-99_22

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_11

    If the relationship between the defect size and the fracture strength of welded joint is made clear, the permissible level of the defect size to secure the performance required by the design is grasped, and it is useful for the admission decision with the defects which is detected by the ultra sonic test. In this paper, the fracture strength of welded joints with weld defects is discussed. In order to grasp the permissible level of the defect size of welded joint, the investigation about the results of the previous studies was carried out and the construction of the estimated equation of the fracture strength by application of linear fracture mechanics was attempted. As the results of this study, the estimated equation was proposed.
  • Application of laser welding on high-strength steel for buildings (H-SA700)

    pp. 99_23-99_30

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_23

    Arc welding is commonly applied to high-strength steel for buildings (H-SA700). However, the heat-affected zones of H-SA700 often become soft and the yield stress decreases compared to that of the base metal owing to the large heat input of arc welding. In this study, laser welding was applied to H-SA700. The residual stress, hardness, mechanical property and fracture toughness of H-SA700 after laser welding were examined and the results were compared with those of arc welding. As a result, the softened area of H-SA700 welded using laser welding was considerably smaller than that obtained using arc welding, and the yield stress was the same as that of the base metal. Fracture pass deviation (FPD) was observed in the Charpy impact test.
  • EXPERIMENTAL STUDY ON REINFORCEMENT METHOD USING CFRP FOR BENDING LOAD BEARING CAPACITY OF DOUBLY SYMMETRIC STEEL PLATE GIRDER

    pp. 99_31-99_39

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_31

    In the RC slabs replacement of viaducts, the reinforcement of steel girders is necessary. The reinforcement of the bending load bearing capacity of the steel girder with the carbon fiber sheet is considered. We carried out four points of bending tests for the specimens which assumed parameters such as types of steel, width-thickness ratio of web, width and thickness ratio of compression flange, with or without horizontal stiffeners, and with or without reinforcement by CFRP sheets. This study revealed the improvement of load-carrying capacity of a steel girder under bending by the application of proposed reinforcement. Carbon fiber sheets were not peeled off from the steel girder until reaching its maximum load.
  • AN INVESTIGATION OF STRENGTHENING MECHANISM FOR SHEAR STRENGTH OF WEB PLATE BY CFRP

    pp. 99_41-99_51

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_41

    In this study, the strengthening mechanism for the shear capacity of web plate by CFRP has been investigated. Loading tests were carried out with the several sheet bond direction as parameters. The mechanism was examined by the viewpoints of shear buckling strength and post-buckling strength. The carbon fiber sheet along the tensile axis of diagonal tension field can improve the post-buckling strength due to the retardation of yield occurrence at the tension field. On the other hand, both the shear buckling strength and the post-buckling strength increase by using the sheet along the compression axis, since the outof-plane deformation of web plate is prevented.
  • FATIGUE STRENGTH OF SINGLE SIDED TRANSVESE BUTT WELDED JOINTS WITH PENETRATION BEADS

    pp. 99_53-99_65

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_53

    Fatigue strength category for transverse butt welded joints with full penetration welds from both sides is specified as D by the JSSC Fatigue Design Recommendations on the basis of a lot of fatigue test data. However, the fatigue test data do not exist so much as for transverse but welded joints with full penetration welds from one side. In this study, for the purpose of obtaining the fatigue strength of the one side welded joints, fatigue tests and stress analyses under axial forces and plate bending are carried out on four kinds of specimens welded by different welding methods.
  • LOCAL BUCKLING BEHAVIOR AND STRENGTH EVALUATION OF CORRODED STEEL SHAPES

    pp. 99_67-99_76

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.11273/jssc.25.99_67

    In recent years, serious damages of aging steel structures and the related accidents have often been reported, it is imperative to assess the structural health conditions and take necessary measures to sustain the functions of the structures. In this paper, paying an attention to local buckling, the behavior and strength of corroded steel angle and channel stub columns were studied with FEM analyses using geometry information obtained directly from the corroded steel shapes. Through the detailed behavioral observations in the analyses, stress redistribution within the cross sections was identified even in corroded steel members after initiation of elastic local buckling. It was also pointed out that the ultimate strengths of the corroded steel stub columns were reasonably evaluated based on traditional effective width theory using mean thickness of each plate element.

Article Access Ranking

17 Oct. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Research and Application of Model and Control Strategies for Hot Rolled Strip Cooling Process Based on Ultra-Fast Cooling System ISIJ International Advance Publication
  3. Modeling of Surface Crack Defects Developed on Shear Edge in High-strength Automotive Steel Sheets ISIJ International Advance Publication
  4. Online Prediction of Hot Metal Temperature Using Transient Model and Moving Horizon Estimation ISIJ International Vol.59(2019), No.9
  5. Thermal Decomposition Reaction Kinetics of Hematite Ore ISIJ International Advance Publication
  6. Influences of Na2O, K2O and Li2O Additions on Electrical Conductivity of CaO–SiO2–(Al2O3) Melts ISIJ International Advance Publication
  7. Influence of Selective Surface Oxidation of Si and Mn on Fe–Zn Alloying Reaction on Hot-rolled Steel Sheets ISIJ International Vol.59(2019), No.9
  8. Observation of Chemical State for Interstitial Solid Solution of Carbon in Low-carbon Steel by Soft X-ray Absorption Spectroscopy ISIJ International Advance Publication
  9. Causes of Particle Trajectory Fluctuation on the Rotating Chute in Circumferential Direction at Bell-less Top with Parallel Type Hoppers ISIJ International Vol.59(2019), No.9
  10. Effects of Alloy Elements on Carbon Partitioning in Early Stages of Proeutectoid Ferrite Transformation in Low Carbon Mn–Si Steels ISIJ International Advance Publication

Search Phrase Ranking

17 Oct. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. steel
  5. hole expanding test
  6. gene
  7. heating furnace temperature control before rolling
  8. hole expanding
  9. furnace dent
  10. hearth roll