Numerical analysis of high-strength reinforcing steel with conventional strength in reinforced concrete beams under monotonic loading

Abstract

This work presents finite element (FE) modeling using the ABAQUS program to investigate the effect of steel reinforcement with three different types of high-strength steels, grades 420, A1035, and SD685 on the flexural behavior of RC beams under monotonic loading. Experimental findings from the literature have been used to validate the proposed model. The numerical load, deflection, mode of failure, failure concrete strain, and bottom steel strain at failure of 24 numerical specimens with collapsed conditions of tension-controlled, balanced, and compression-controlled are recorded. Also, the effect of compression reinforcement is being investigated. The results reveal that the flexural behavior of the experimental test for the three steel grades is well validated by FE analysis. The ductile and brittle behavior features of yield strength (YS) larger than 420 can be predicted for specimens designed according to current standards ACI-318M-19. Also, the compression reinforcement improves load capacity while reducing displacement. It may be argued that when YS decreases, tensile stress and strain of flexural rebar rise, causing the beam to become more ductile. When the YS increased, the brittle behavior was induced.

Behavior of a Multi-Story Steel Structure with Eccentric X-Brace

“…Figs. [16][17][18] show how the base shear changes over time for 6-story, 9-story, and 12-story buildings with W6x16 X-brace sections in the corners. Figs.…”

“…The FE model can help with several tasks, such as finding the best place to put sensors, updating the model based on sensor measurements or a condensed model, measuring and locating structural changes (like damage), figuring out how reliable something is, and predicting how it will react under different simulated loading conditions. [14][15][16][17][18][19][20][21] Concentric X-braced steel frames are popular due to their ability to withstand earthquakes and wind loads. The diagonals disperse seismic energy that would otherwise be lost by plasticizing under strain and bowing under compression.…”

The behavior of reinforced lightweight concrete beams with initial cracks

“…Due to the minimal likelihood of repeating border conditions, this is a serious concern. As a result, the strategy taken may be affected by factors such as technology, economics, and even society [30][31][32].…”