原文传递
Effects of grout and energydissipating bar properties on a Type III grouted seismic connection for precast concrete structures
| 题名： | Effects of grout and energydissipating bar properties on a Type III grouted seismic connection for precast concrete structures |
| 正文语种： | 英文 |
| 作者： | Theresa C. Aragon; Yahya C. Kurama; Donald F. Meinheit |
| 作者单位： | College in Albuquerque, N.Mex.;Civil and Environmental Engineering and Earth Sciences at the University of Notre Dame in Notre Dame, Ind.; Associates Inc. in Chicago, Ill. |
| 关键词： | ASTM A706; deformed reinforcing bar; energy-dissipating steel bar; gap-opening joint; grouted seismic connector; low-cycle fatigue fracture; Type III connection; uniform elongation strain. |
| 摘要： | This paper investigates the effects of grout properties and energy-dissipating steel reinforcing bar properties on the performance of a grouted Type III connection for gap-opening joints of precast concrete structures subjected to seismic displacements. This Type III connection offers the potential for a high-performance yet simple nonproprietary, low-cost system that allows Grade 60 (414 MPa) energy-dissipating ductile deformed reinforcing bars to reach close to their ultimate tensile strength and strain capacity under cyclic loading in a short grouted embedment length. The use of short grouted connections simplifes the construction of precast concrete structures because protruding bar lengths from precast concrete members can be minimized, and feld-grouting lengths can be reduced. The test parameters investigated were the grout product, grout strength, energy-dissipating bar size, and energy-dissipating bar heat. It was found that the grout used in the connector sleeve and low-cycle fatigue fracture of the energy-dissipating bar can limit the deformation capacity of the connection. Additional requirements should be introduced in ASTM A706 to improve the low-cycle fatigue performance of reinforcing bars intended for seismic applications. Furthermore, it may be necessary to increase the bond length of the energy-dissipating bar for this nonproprietary connection to be used without the requirement for a specifc grout product. |
| 出版年： | 2019 |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 期： | 1 |
| 页码： | 31-48 |
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