Abstract
This paper presents a pushover analysis using ABAQUS (Dassault Company, Providence, Rhodes Island, USA) for spatial reinforced concrete (RC) frames. The main purpose is to study the effect of the infills on failure patterns of the RC frames. The Finite Element Method (FEM) model considered an RC frame with fulfilled infills, half-filled infills, and without infills. Column moment, the effective width of the cast in situ slab, and the required ratio of column to beam strength are calculated and analyzed. Research findings indicate that the location of the inflection point varied because of the effect of infills. Some of the calculated values of column moments are larger than those values according to the design code. The effective slab width and the required ratio of column to beam strength are found to be reduced due to the infill effects. The actual effective width of the slab should be considered in the required ratio of column to beam strength. Reasonable advice is proposed and discussed for design purposes.
Highlights
Seismically-induced structural damage demonstrates that “strong column-weak beam” ductile failure mechanisms have not been fully, or even partially, realized, which is inherently contradictory with the philosophy that has been adopted by design codes [1,2,3,4,5,6]
The effective slab width decreases significantly due to infills, and values according to the ACI code [27] and other researchers [28,29] are on the conservative side, especially in the full-filled infill case
The columns’ shear forces calculated by Finite Element Method (FEM) results are 1.56 to 5.02 times larger than those calculated by design codes
Summary
Seismically-induced structural damage demonstrates that “strong column-weak beam” ductile failure mechanisms have not been fully, or even partially, realized, which is inherently contradictory with the philosophy that has been adopted by design codes [1,2,3,4,5,6]. Smith proposed that the carry capacity and stiffness of frames could be increased code [15] specifies that infills can be considered as non‐structural components. How to carried evaluate reinforced concrete (RC) components correctly and propose appropriate recommendations become and Sigmund [22] to research infills with openings. Studied infill material effects on the in-situ seismicslabs performance of have been carried out in RC frames structures. Zovkic [11] and Bertero [18] studied infill material effects on the seismic performance of structures and pointed out that the performance of the infill was of great relevance to material are still insufficient. To guarantee accurate and safe design of RC frames with infills, this paper carries structures and pointed out that the performance of the infill was of great relevance to material strength. Tests results indicated that the hysteretic energy dissipation capacity was decreased due to openings, and the failure mode of infills was related to the dissipation capacity was decreased due to openings, and the failure mode of infills was related to the
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