A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dynamic behaviors of steel multiple-rocking-column structural system with rocking stoppers
Highlights A steel low-damage multiple-rocking-column structural system proposed. Small-scale shaking table tests of a three-story rocking-column steel frame conducted. Unique dynamic properties such as more participation of high-order mode vibration compared with rigidly-jointed frames. Analytical and finite element models proposed for the multiple-rocking-column system. Numerical results indicate that the impact does not significantly increase internal forces of the system.
Abstract This study investigates dynamic behaviors of an innovative steel multiple-rocking-column structural system consisting of continuous beams, layered columns and rocking stoppers with rotation thresholds. If the rotation threshold is exceeded, rocking motion of the columns at the same level will be stopped and potential overturning of the whole structure is thus avoided. When the columns rock within the rotation threshold, the lateral stiffness is much smaller than that of the corresponding rigidly-jointed structure, the structural weight provides a self-centering force, and the internal forces of the structure can be maintained at a lower magnitude to minimize structural damage. Characteristics of the proposed system are different from stacked block systems and controlled rocking systems. A three-story representative structure is designed to investigate characteristics of the proposed system, based on a previous study of a corresponding single-story one. An equivalent rectangular column model is established, exhibiting a highly nonlinear relationship between the inter-story shear force and drift. Small-scale shaking table tests are conducted on 1:10 scaled models of the proposed system and the corresponding rigidly-jointed frame system. Modal identification and analysis are employed to investigate the equivalent modes, frequencies and participation factors of the experimental results. Energy features and force reduction effects of the proposed system are verified through numerical simulations.
Dynamic behaviors of steel multiple-rocking-column structural system with rocking stoppers
Highlights A steel low-damage multiple-rocking-column structural system proposed. Small-scale shaking table tests of a three-story rocking-column steel frame conducted. Unique dynamic properties such as more participation of high-order mode vibration compared with rigidly-jointed frames. Analytical and finite element models proposed for the multiple-rocking-column system. Numerical results indicate that the impact does not significantly increase internal forces of the system.
Abstract This study investigates dynamic behaviors of an innovative steel multiple-rocking-column structural system consisting of continuous beams, layered columns and rocking stoppers with rotation thresholds. If the rotation threshold is exceeded, rocking motion of the columns at the same level will be stopped and potential overturning of the whole structure is thus avoided. When the columns rock within the rotation threshold, the lateral stiffness is much smaller than that of the corresponding rigidly-jointed structure, the structural weight provides a self-centering force, and the internal forces of the structure can be maintained at a lower magnitude to minimize structural damage. Characteristics of the proposed system are different from stacked block systems and controlled rocking systems. A three-story representative structure is designed to investigate characteristics of the proposed system, based on a previous study of a corresponding single-story one. An equivalent rectangular column model is established, exhibiting a highly nonlinear relationship between the inter-story shear force and drift. Small-scale shaking table tests are conducted on 1:10 scaled models of the proposed system and the corresponding rigidly-jointed frame system. Modal identification and analysis are employed to investigate the equivalent modes, frequencies and participation factors of the experimental results. Energy features and force reduction effects of the proposed system are verified through numerical simulations.
Dynamic behaviors of steel multiple-rocking-column structural system with rocking stoppers
Xie, Ruihong (author) / Li, Zhuofeng (author) / Xiang, Ping (author) / Jia, Liang-Jiu (author)
Engineering Structures ; 243
2021-05-29
Article (Journal)
Electronic Resource
English
Compressive Strength of Rocking Steel Bridge Pier upon Rocking
| Springer Verlag | 2024
Seismic Behavior of Resilient Rocking Steel Column Base
| Taylor & Francis Verlag | 2023
Seismic Performance of a Resilient Controlled Multiple-Rocking-Column Steel Frame System
| Springer Verlag | 2024
Prefabricated Rocking Wall Structural System
| Springer Verlag | 2023