We enter a full concrete section into computer, than we make a calculation and then we enter the effects of cracks due to load, shrinkage and creep. There is a clear inconsistency in the metod of calculation of reinforced concrete constructions. INFLUENCE OF CRACKS ON REINFORCED CONCRET, WHAT IS SPECIFICALLY RELATED TO FRAME STRUCTURES F eel free to share this article, subscribe to our newsletter and follow us on our social media pages. Leave your message in the comment section below. What are your thoughts on the procedure discussed above? We’d love to hear from you.
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Please subscribe to our youtube channel for more structural software tips like this! “Long Term” – this is to combined 3 load cases for long-term analysis principle.īe sure to check the design preferences and edit the design parameters accordingly.Īs well as the Cracking Analysis Options.Ĭheck out the video presentation below on how the long term deflection is being performed in SAFE. Go to Define>Load Combinations>Add new combinations.“Elastic”-to display elastic deflection for service loads. Define a Load Case for Immediate-Sustained
Go to Define>Load Cases>Add New Case > tick nonlinear (long-term cracked) for the analysis typeĤ.Define a Load Case for Long-Term- Sustained Go to Define>Load Cases>Add New Case > tick nonlinear (cracked) for the analysis typeģ.Define a Load Case for Immediate All Loads READ ALSO: Shear Friction Check: A Worked ExampleĢ. Long-term Deflection = 75%LL (immediate effect) + 25% LL+DL+SDL (long-term effect). In SAFE, the following principle may apply on the modeling LONG TERM DEFLECTION– is the sum of immediate deflection for 75% Live load, (DL+SDL+LL) – (DL+SDL+0.25LL) and Long-Term Deflection for DL+SDL+25% Sustained Live Load. As we commonly encountered in the design, DL stands for dead loads, LL designates the live loads and SDL denotes superimposed dead loads. This article will guide you with easy to understand step by step on doing slab’s long-term deflection analysis using the SAFE program. Before we proceed further, let us define the following parameters used. In this article, we will focus on the analysis of long-term deflections on slabs.Īnalysis of Long-term deflection of the slab using SAFE program is often confusing especially for those newbies in structural design, but that’s already a few steps away of knowing. It is also influenced by the condition of the cracking before loading, then creeping, which depends on the time passed to the time of the first loading, the environment, and other factors. Long Term-Deflection in slabs/beams is the deflection or the deformation that occurs over time due to shrinkage and temperature. Long term deflection, SAFE Finite Element Analysis, Slab Design
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