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Effect of Beam Tension on Cyclic Performance of WUF-W Steel Moment Connection
| 题名： | Effect of Beam Tension on Cyclic Performance of WUF-W Steel Moment Connection |
| 其他题名： | AISC.(2010a)."Prequalified connections for special and intermediate steel moment frames for seismic applications."AISC 358-10,Chicago. |
| 正文语种： | 英文 |
| 作者： | Hyoung-Bo Sim |
| 关键词： | Connections;Cyclic tests;Seismic design;Steel;Metal and composite structures |
| 摘要： | The effect of axial force on the flexural strength of steel members, not connections, has been extensively researched for nonseismic loading conditions. To address the latter for seismic applications, four nominally identical beam-column subassemblies with a welded unreinforced flange-welded web (WUF-W) moment connection were cyclically tested. The specimen design included built-up I-shape beams (db = 1,118 mm) and built-up I-shape columns (dc = 1,219 mm). Because themember sizes and weights significantly exceeded those permitted by current standards for use as a prequalifiedWUF-W connection, all except one specimen had flared beam flanges with the goal of protecting the beam flange complete-joint-penetration CJP groove welds. A constant axial tension force in the beam (16％ of nominal beam yield strength) was applied to three specimens, whereas one flared specimen did not have axial tension. When tension was present, testing showed that beam local buckling drastically diminished. A higher flexural strength was developed in the plastic hinge, indicating that the Cpr value in current standards for capacity design is nonconservative when tension is present. Fracture in the beam web instead of flange CJP welds dominated the failure mode because of a change in the load transfer mechanism. More stringent beam web welding requirements than those specified in current standards were shown to improve connection performance. |
| 出版年： | 2017 |
| 论文唯一标识： | P-26Y2017V143N09026 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001833 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 143 |
| 期： | 09 |
| 页码： | 320-327 |
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