原文传递
Examination of the effective coefficient of friction for shear friction design
| 题名： | Examination of the effective coefficient of friction for shear friction design |
| 正文语种： | 英文 |
| 作者： | Kristian Krc;Samantha Wermager;Lesley H. Sneed;Donald Meinheit |
| 作者单位： | Missouri University |
| 关键词： | All-lightweight concrete; coefficient of friction; cold joint; interface condition; modification factor; monolithic; monotonic loading; roughened; sand-lightweight concrete; shear friction; uncracked |
| 摘要： | Since the introduction of the effective coefficient of friction u approach to the PCI Design Handbook: Precast and Prestressed Concrete, several studies have provided additional test results that can be used to compare and validate the shear friction design provisions. This paper presents a database of shear friction test results collected from the literature that was analyzed for the effective coefficient of friction approach used in the PCI Design Handbook (Eq. [5-32b]), and the coefficient of friction approach used in the PCI Design Handbook (Eq. [5-32a]) and the ACI Building Code Requirements for Structural Concrete (ACI 31 & 14) and Commentary (ACI 3I8R-I4) (Eq. [22.9.4.2]). The database was limited to push-off specimens subjected to monotonic loading and without external normal forces. The data were categorized in terms of concrete type, interface condition, compressive strength of concrete, clamping stress, and area of shear interface to help identify gaps in the literature. Analysis of the database showed that PCI Eq. (5-32b) is more accurate and has a lower standard deviation than both PCI Eq. (5-32a) and ACI 318-14 Eq. (22.9.4.2) for normalweight, sand-lightweight, and all-light-weight concrete with monolithic uncracked, monolithic precracked, and cold-joint roughened interface conditions. For the cold-joint smooth interface condition, the authors recommend removing the modification factor A in the coefficient of friction /jl to provide more accurate and economical designs. |
| 出版日期： | 2016.11-12 |
| 出版年： | 2016 |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 卷： | Vol.61 |
| 期： | No.06 |
| 页码： | 44-67 |
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