Span-Depth Ratios for One-Way Members Based on ACI 318 Deflection Limits - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: eBooks (https://forum.civilea.com/forum-63.html) +--- Forum: Journals, Papers and Presentations (https://forum.civilea.com/forum-74.html) +--- Thread: Span-Depth Ratios for One-Way Members Based on ACI 318 Deflection Limits (/thread-36221.html) |
Span-Depth Ratios for One-Way Members Based on ACI 318 Deflection Limits - miquan - 05-20-2012 Span-Depth Ratios for One-Way Members Based on ACI 318 Deflection Limits Author: Peter H. Bischoff and Andrew Scanlon | Size: 1 MB | Format: PDF | Quality: Original preprint | Publisher: ACI | Year: 2009 | pages: 10
Span-depth ratio (l/h) expressions are developed for steel-reinforced concrete one-way slabs and beams to satisfy deflection control and flexural strength requirements. The expressions are presented as functions of reinforcement ratio and specified deflection-to-span limit. A comparative study is performed to evaluate the effects of effective moment of inertia, shrinkage restraint, construction loads, sustained live load, long-time deflection multiplier, support conditions, and deflection limits on the resulting span-depth ratios. A comparison is also made with minimum thickness values prescribed by ACI 318 that are a function of span and support conditions only. Effects of various input parameters are considered in examples involving a simply supported rectangular beam and an interior span of a continuous one-way slab. The results of the study indicate some of the limitations associated with the ACI 318 minimum thickness requirements. Code: *************************************** |