Best Location of Conventional Outrigger in Tall Buildings with Discontinuity in Moment of Inertia of Shear Core using Energy Method with Closed-Form Solution
نویسندگان
1 Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
2 Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
3 Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
doi
10.22075/jrce.2025.2337چکیده
This study presents a graphical solution for determining the initial positioning of Conventional Outrigger (CO) system in the shear core with discontinuity in moment of inertia, using the energy method in tall building. In this model a cantilevered beam presents The framed-tube system, while the CO system is modeled by rotational springs located at their respective positions. By applying the energy method, best locations of the CO are identified along the building height to maximize energy absorption and dissipation. For validation, the model is compared with the case of a uniform shear core, and the results are shown to be consistent with previous studies. Quantitative results indicate that when the shear core has no discontinuity, the best positions of the CO are approximately 0.44L, 0.49L, 0.32L, and 0.52L of the building height (L) for uniform, triangular, inverted triangular, and parabolic load distributions, respectively. Furthermore, with increasing values of the parameter γ, which corresponds to greater slenderness in the second segment of the shear core, the best positions shift upward along the building height. In some cases, the best location falls within the first segment of the shear core, similar to the case of a uniform shear core. The proposed closed-form solution and the developed utility graphs offer a practical and efficient tool for identifying the initial positioning of CO system during the preliminary design of tall buildings.
