Thesis
In-plane shear performance of partially grouted masonry shear walls
Washington State University
Master of Science (MS), Washington State University
2010
Handle:
https://hdl.handle.net/2376/102133
Abstract
This research investigated the effectiveness of the current MSJC (2008) Strength Design shear strength equations for predicting the shear strength of partially grouted masonry walls. Six concrete masonry walls, five partially grouted and one fully grouted, were constructed and subjected to in-plane cyclical loading using a displacement based protocol. Variables investigated included grout horizontal spacing and horizontal (shear) reinforcement ratio. The effects of grout horizontal spacing and horizontal reinforcement ratio were analyzed. The MSJC (2008) shear equations were found to significantly overestimate the shear strength of specimens with 48 in (1219 mm) grout horizontal spacing (errors between -16% to -43%) and the fully grouted specimen (error of -34%). Specimens with 32 in. (813 mm) and 24 in. (610 mm) grout horizontal spacing were predicted with a -6% and +1% error, respectively. The experimental results point to a maximum effective shear reinforcement ratio in the range of 0.085% to 0.100% for specimens with a 48 in. (1219 mm) grout horizontal spacing. A shear reinforcement anchorage problem was encountered with two specimens with some suggestion of a developing anchorage problem in other specimens. This suggests the code-compliant 180° hooks may be inadequate or there may need to be a limit placed on shear reinforcement bar diameter for a given masonry unit width. Based on the experimental results, recommendations were made for modifications to the MSJC (2008) shear equations. Recommendations for future research were also made.
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Details
- Title
- In-plane shear performance of partially grouted masonry shear walls
- Creators
- Shawn Mark Nolph
- Contributors
- Mohamed ElGawady (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525090001842
- Language
- English
- Resource Type
- Thesis