Earthquakes worldwide have clearly demonstrated the vulnerability of reinforced concrete members to degradation in shear strength when subjected to cyclic loading. Such degradation can lead to significant damage to the structure and, possibly, even collapse. With the advancement of performance-based earthquake engineering, where the response of the structure must be traced through all levels of damage, there is a significant need to accurately define the deformation capacity and shear strength for such members. This symposium publication represents an effort from researchers across the globe trying to address this challenging problem.
Although at the time of publication there are some methodologies that can be used in performance-based earthquake engineering, there is a significant need for improved methods better suited for these types of applications. Furthermore, one of the concerns often expressed by researchers is that test data used in the past to develop and calibrate existing models consisted of relatively small data sets. This problem is compounded by differences between experimental studies in aspects such as the type of load history used, the manner in which deformations were recorded during tests, and the definition of displacement and strength at failure.
The recent development of the PEER column database, hosted by the University of Washington, provided a valuable resource to overcome some of these problems. It presented researchers with a larger pool of data, which included the full hysteretic response of every column in the data set. Although this represented a very significant step forward, efforts of this kind should continue to improve the ability of researchers to calibrate and evaluate models for shear strength and deformation capacity.
A joint technical session was organized by Joint ACI-ASCE Committees 441, Reinforced Concrete Columns, and 445, Shear and Torsion, during the American Concrete Institute’s Fall 2004 Convention in San Francisco, CA. The goal of the technical session was to showcase recent developments in this area, with the hope that continued discussion will lead to improved models that are suitable for performance-based engineering.
This symposium publication is a collection of technical articles presented at that meeting and represents an effort from Joint ACI-ASCE Committees 441 and 445 to continue the technical discussion on this topic
Table of Contents
SP-236—1: Deformation Capacity of RC Members with Brittle Details Under
Cyclic Loads 1
by D.V. Syntzirma and S.J. Pantazopoulou
SP-236—2: Effects of Displacement History on Failure of Lightly Confined
Bridge Columns 23
by R.T. Ranf, M.O. Eberhard, and J.F. Stanton
SP-236—3: Effect of Shear Reversals on Dynamic Demand and Resistance of Reinforced Concrete Elements 43
by S. Pujol and M.A. Sözen
SP-236—4: Seismic Performance of Reinforced Concrete Columns: P-Δ Effect 61
by S. Bae and O. Bayrak
SP-236—5: Application of a Probablistic Drift Capacity Model for
Shear-Critical Columns 81
by L. Zhu, K.J. Elwood, T. Haukaas, and P. Gardoni
SP-236—6: Effect of Cyclic Loading on the Shear Strength of RC Members 103
by M. von Ramin and A.B. Matamoros
SP-236—7: Shear-Flexure Interaction for Structural Walls 127
by L.M. Massone, K. Orakcal, and J.W. Wallace
SP-236—8: Drift Capacity of Walls Accounting for Shear: The 2004 Canadian
Code Provisions 151
by P. Adebar
SP-236—9: Effect of Steel Grid Orientation on Seismic Performance of
Shear Walls 171
by Y.L. Mo, W.-I. Liao, J. Zhong, C.C. Lin, and C.-H. Loh