Interior Slab-Column Connections under Earthquake Loading: Test Data, Observations, and Design Implications
Event details
| Date | 25.08.2016 |
| Hour | 14:30 › 15:30 |
| Speaker | Prof, Dr Mary Beth Hueste, Texas A&M University, Zachry Department of Civil Engineering, Texas, USA |
| Location | |
| Category | Conferences - Seminars |
ABSTRACT
Past earthquake events have demonstrated the vulnerability of concrete frame buildings with flat slab floor systems under lateral loading, particularly the potential for brittle punching shear failures. Laboratory tests have been conducted for nearly five decades to evaluate the response of slab-column connections under combined gravity and lateral loading. This data has been critical for understanding the response of slab-column frames under lateral loading, and for developing design requirements and recommendations that consider the influence of gravity shear on lateral drift capacity.
An updated database of slab-column connection tests in the literature has been developed using consistent criteria for selecting key response parameters, including the limiting lateral drift capacity and gravity shear ratio. The collected test results include interior reinforced concrete (RC) and post-tensioned (PT) concrete slab-column connections with and without shear reinforcement under combined lateral and gravity shear demands. The laboratory test data and specimen parameters are compared to current ACI design requirements, and recommendations and trends are noted. This review confirms that the level of gravity shear has a significant effect on the limiting drift for slab-column connections without shear reinforcement. In addition, the presence of shear reinforcement or prestressing tends to improve lateral drift capacity. The ACI 318-14 relationship to evaluate the design lateral deformation demand for slab-column connections is reviewed with respect to the updated data. Possible modifications to this relationship for both RC and PT slab-column connections are presented.
BIO:
Mary Beth Hueste is a Professor in the Zachry Department of Civil Engineering at Texas A&M University. A Fellow of the American Concrete Institute (ACI), Mary Beth is a member of ACI-ASCE Committee 352, Joints and Connections in Monolithic Concrete Structures, ACI Subcommittee 318-J, Joints and Connections (Structural Concrete Building Code), and ACI Committee 374, Performance-Based Seismic Design of Concrete Buildings. Her research focuses on earthquake resistant design of reinforced concrete structures, performance-based seismic design, design and evaluation of prestressed concrete bridge structures, and assessment of aging and historic infrastructure.
Past earthquake events have demonstrated the vulnerability of concrete frame buildings with flat slab floor systems under lateral loading, particularly the potential for brittle punching shear failures. Laboratory tests have been conducted for nearly five decades to evaluate the response of slab-column connections under combined gravity and lateral loading. This data has been critical for understanding the response of slab-column frames under lateral loading, and for developing design requirements and recommendations that consider the influence of gravity shear on lateral drift capacity.
An updated database of slab-column connection tests in the literature has been developed using consistent criteria for selecting key response parameters, including the limiting lateral drift capacity and gravity shear ratio. The collected test results include interior reinforced concrete (RC) and post-tensioned (PT) concrete slab-column connections with and without shear reinforcement under combined lateral and gravity shear demands. The laboratory test data and specimen parameters are compared to current ACI design requirements, and recommendations and trends are noted. This review confirms that the level of gravity shear has a significant effect on the limiting drift for slab-column connections without shear reinforcement. In addition, the presence of shear reinforcement or prestressing tends to improve lateral drift capacity. The ACI 318-14 relationship to evaluate the design lateral deformation demand for slab-column connections is reviewed with respect to the updated data. Possible modifications to this relationship for both RC and PT slab-column connections are presented.
BIO:
Mary Beth Hueste is a Professor in the Zachry Department of Civil Engineering at Texas A&M University. A Fellow of the American Concrete Institute (ACI), Mary Beth is a member of ACI-ASCE Committee 352, Joints and Connections in Monolithic Concrete Structures, ACI Subcommittee 318-J, Joints and Connections (Structural Concrete Building Code), and ACI Committee 374, Performance-Based Seismic Design of Concrete Buildings. Her research focuses on earthquake resistant design of reinforced concrete structures, performance-based seismic design, design and evaluation of prestressed concrete bridge structures, and assessment of aging and historic infrastructure.
Practical information
- General public
- Free
Organizer
- Prof. Dr Katrin Beyer & Prof. Dr Aurelio Muttoni
Contact
- Prof. Dr Katrin Beyer & Prof. Dr Aurelio Muttoni