Influence of Member Size on the Shear Response of Reinforced Concrete Members

摘要

This report is the 4th of 5 reports in a series of reports on the seismic211u001eperformance of columns. When a series of geometrically similar reinforced 211u001econcrete members fail in shear, the shear stress at failure sometimes 211u001esubstantially decreases as the size of the member increases. Identyfing those 211u001esituations where the size effect in shear is significant is the main objective of 211u001ethe analytical and experimental studies summarized in this report. It is 211u001econcluded that the columns which contain only small amounts of shear 211u001ereinforcement, are subject to low axial loads, and have ratios of column height 211u001eto member thickness greater than about 2.5, are particularly sensitive to the 211u001esize effect in shear. The report demonstrates that analytical methods based on 211u001ethe modified compression field theory are capable of predicting resonably well 211u001ethe magnitude of the size effect in shear.