The Experts below are selected from a list of 32583 Experts worldwide ranked by ideXlab platform

Chiaming Uang - One of the best experts on this subject based on the ideXlab platform.

  • effects of panel zone strength and beam Web Connection method on seismic performance of reduced beam section steel moment Connections
    Journal of Structural Engineering-asce, 2005
    Co-Authors: Sangwoo Jeon, Chiaming Uang
    Abstract:

    This paper presents test results on eight reduced beam section (RBS) steel moment Connections. The testing program addressed Web Connection type (bolted versus welded) and panel zone (PZ) strength as the key variables. Specimens with medium PZ strength were designed to promote energy dissipation from both PZ and RBS regions such that expensive doubler plates were not needed. Both strong and medium PZ specimens with a welded Web Connection were able to provide satisfactory Connection rotation capacity for special moment-resisting frames. However, specimens with a bolted Web Connection performed poorly due to premature brittle fracture of the beam flange at the weld access hole. A plausible explanation for the higher incidence of base metal fracture in bolted Web specimens was presented based on the measured strain data. Test results from this study and by others showed that panel zones could easily develop a plastic rotation of 0.01 rad without causing distress to the beam flange groove welds. At this deformation level, the amount of beam distortion (i.e., buckling) was about one half that developed in strong PZ specimens. A criterion for a balanced PZ strength that improves the plastic rotation capacity while reducing the amount of beam buckling is proposed.

Sangwoo Jeon - One of the best experts on this subject based on the ideXlab platform.

  • effects of panel zone strength and beam Web Connection method on seismic performance of reduced beam section steel moment Connections
    Journal of Structural Engineering-asce, 2005
    Co-Authors: Sangwoo Jeon, Chiaming Uang
    Abstract:

    This paper presents test results on eight reduced beam section (RBS) steel moment Connections. The testing program addressed Web Connection type (bolted versus welded) and panel zone (PZ) strength as the key variables. Specimens with medium PZ strength were designed to promote energy dissipation from both PZ and RBS regions such that expensive doubler plates were not needed. Both strong and medium PZ specimens with a welded Web Connection were able to provide satisfactory Connection rotation capacity for special moment-resisting frames. However, specimens with a bolted Web Connection performed poorly due to premature brittle fracture of the beam flange at the weld access hole. A plausible explanation for the higher incidence of base metal fracture in bolted Web specimens was presented based on the measured strain data. Test results from this study and by others showed that panel zones could easily develop a plastic rotation of 0.01 rad without causing distress to the beam flange groove welds. At this deformation level, the amount of beam distortion (i.e., buckling) was about one half that developed in strong PZ specimens. A criterion for a balanced PZ strength that improves the plastic rotation capacity while reducing the amount of beam buckling is proposed.

Taichiro Okazaki - One of the best experts on this subject based on the ideXlab platform.

  • Cyclic Behavior of Replaceable Steel Coupling Beams
    Journal of Structural Engineering-asce, 2017
    Co-Authors: Xiaodong Ji, Qifeng Ma, Yandong Wang, Taichiro Okazaki
    Abstract:

    AbstractFor improving the seismic resiliency of coupled shear wall systems, a type of replaceable steel coupling beam was developed, which consists of a central “fuse” shear link connecting to steel beam segments at its two ends. Inelastic deformation is concentrated in the shear link during a severe earthquake, and the damaged links can be replaced easily as specialized link-to-beam Connections are adopted. This paper presents a series of quasi-static tests conducted to examine the seismic behavior and replaceability of the replaceable coupling beams. A total of four large-scale specimens were designed and tested, where different types of beam-to-link Connections were adopted, including end plate, splice plate, bolted Web, and adhesive Web. All specimens fully developed the shear strength of the fuse links and showed large inelastic rotation capacity of no less than 0.06 rad, except for the specimen with the adhesive Web Connection, which failed at an early stage. The specimen with the end plate connecti...

Xiaodong Ji - One of the best experts on this subject based on the ideXlab platform.

  • Cyclic Behavior of Replaceable Steel Coupling Beams
    Journal of Structural Engineering-asce, 2017
    Co-Authors: Xiaodong Ji, Qifeng Ma, Yandong Wang, Taichiro Okazaki
    Abstract:

    AbstractFor improving the seismic resiliency of coupled shear wall systems, a type of replaceable steel coupling beam was developed, which consists of a central “fuse” shear link connecting to steel beam segments at its two ends. Inelastic deformation is concentrated in the shear link during a severe earthquake, and the damaged links can be replaced easily as specialized link-to-beam Connections are adopted. This paper presents a series of quasi-static tests conducted to examine the seismic behavior and replaceability of the replaceable coupling beams. A total of four large-scale specimens were designed and tested, where different types of beam-to-link Connections were adopted, including end plate, splice plate, bolted Web, and adhesive Web. All specimens fully developed the shear strength of the fuse links and showed large inelastic rotation capacity of no less than 0.06 rad, except for the specimen with the adhesive Web Connection, which failed at an early stage. The specimen with the end plate connecti...

Yandong Wang - One of the best experts on this subject based on the ideXlab platform.

  • Cyclic Behavior of Replaceable Steel Coupling Beams
    Journal of Structural Engineering-asce, 2017
    Co-Authors: Xiaodong Ji, Qifeng Ma, Yandong Wang, Taichiro Okazaki
    Abstract:

    AbstractFor improving the seismic resiliency of coupled shear wall systems, a type of replaceable steel coupling beam was developed, which consists of a central “fuse” shear link connecting to steel beam segments at its two ends. Inelastic deformation is concentrated in the shear link during a severe earthquake, and the damaged links can be replaced easily as specialized link-to-beam Connections are adopted. This paper presents a series of quasi-static tests conducted to examine the seismic behavior and replaceability of the replaceable coupling beams. A total of four large-scale specimens were designed and tested, where different types of beam-to-link Connections were adopted, including end plate, splice plate, bolted Web, and adhesive Web. All specimens fully developed the shear strength of the fuse links and showed large inelastic rotation capacity of no less than 0.06 rad, except for the specimen with the adhesive Web Connection, which failed at an early stage. The specimen with the end plate connecti...