EFFECT OF COLUMN-TO-BEAM STRENGTH RATIO ON THE DRIFT BEHAVIOR OF RC FRAME STRUCTURES

Date

2023-6-23

Author

Sondilek, Fırat

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Seismic design codes require the sum of the flexural strength of the columns framing into a joint to be greater than that of the beams at the same joint for moment frames. This is generally termed the “strong column-weak beam” approach. This requirement aims to prevent story mechanisms in moment frames by reducing the column yielding during earthquakes. Although the seismic design codes suggest specific minimum column-to-beam strength ratios, previous research has shown that the suggested minimums may not always lead to the desired collapse mechanism. Moreover, it has been observed that there is a correlation between the drift distribution and the column-to-beam strength ratio distribution throughout the elevation of the frame structures. This study investigates the effect of various column-to-beam strength ratios on the drift behavior of the reinforced concrete moment frames. Parametric studies consisting of frames with differing numbers of stories were performed for this purpose. Numerical modeling of the frames was done in the OpenSeesPy framework. Nonlinear dynamic analyses were used for the assessment of the seismic response of the model frames. Furthermore, the influence of the different column-to-beam strength ratios on the cost and material consumption was investigated.

Subject Keywords

Seismic Design, Strong Column - Weak Beam, Reinforced Concrete Structures, Earthquake Engineering

URI

https://hdl.handle.net/11511/105282

Collections

Northern Cyprus Campus, Thesis