Interaction between bracing system and moment resisting frame in braced RC frames

A Computational Investigation for the Seismic Response of Rc Structures Strengthened by Cable Elements

“…A calibration of the presented numerical approach is realized by using available experimental results for a simple typical one-bay one-storey RC frame strengthened with steel cross X-bracing and investigated by Massumi et al [3,4 ].The results concern two experimental models of reinforced concrete frames, which have been designed on the basis of old traditional codes. The first of them is a bare-frame and the second is the same frame, but strengthened with steel X-bracing.…”

“…The single-bay, one-storey frame and the experimental testing procedure are shown in Figures 1, 2 and 3 adapted from [3,4]. The frame was of concrete C25 and had section dimensions (12cm)x(12cm) for the two columns and the beam.…”

“…Yield strength of steel bracings was 240 MPa. For the details of the experimental program see Massumi et al [3,4].…”

“…So, the cable constitutive law, concerning the unilateral (slackness), hysteretic, fracturing, unloading-reloading etc. behavior, has the diagramme depicted in Based on the experimental procedure [3,4] and on Fig. 4, the loading history has been simulated as an displacement-controlled multiple earthquake excitation imposed on the top left node of the frame.…”

“…One of the simple, cheap and efficient methods for strengthening of RC frames against lateral induced earthquake load is the use of steel cross X-bracings, see e.g. Massumi [3,4] and the references given therein. The combination of reinforced concrete frame with steel cross X-bracing is not a common practice due to unknown behavior and performance that needs to be investigated.…”