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A tuned mass rocking wall (TMRW) is a passive control device that combines the merits of a traditional tuned mass damper (TMD) and a traditional rocking wall (RW). TMRWs not only help avoid weak story failure of the host structure but can also be regarded as a largely tuned mass substructure in the building structure. Through the appropriate design of the frequency ratio, the host structure can dissipate much more energy under earthquake excitations. In this paper, the basic equations of motion for the mechanical model of an SDOF structure-rigid rocking wall are established, and the optimization formulas of frequency ratio and damping ratio of TMRW are derived. Through the dynamic elastoplastic analysis of a six-story TMRW-frame model, the applicability of the derived parameter optimization formulas and the effectiveness of the TMRW in seismic performance control are investigated. The results demonstrate that the TMRW can coordinate the uneven displacement angle between stories of the host structure. Additionally, the TMRW is found to possess the merit of reducing both the peak and root-mean-square (RMS) structural responses when subjected to different types of earthquake excitations.
Andong Wang; Shanghong Chen; Wei Lin; Ai Qi. Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures. Buildings 2021, 11, 293 .
AMA StyleAndong Wang, Shanghong Chen, Wei Lin, Ai Qi. Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures. Buildings. 2021; 11 (7):293.
Chicago/Turabian StyleAndong Wang; Shanghong Chen; Wei Lin; Ai Qi. 2021. "Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures." Buildings 11, no. 7: 293.
A new dapped-end beam to column connection is designed in this paper. Its assembly connection zone changes from inside the joint to midspan of the beam. The proposed connection can not only provide good structural integrity but also ensure that the plastic hinge moves away from the column edge. The rotational capacity of the plastic hinge determines the internal force redistribution of the joint and the energy dissipation capacity. The high-strength bolts and steel plates are used to realize connection, further enhancing the rotation of the plastic hinge and minimizing the cast-in-place concrete volume. Three full-scale exterior beam to column joints are casted and then subjected to reversal cyclic loading. The finite element (FE) analyses are carried out to compare with experimental results and study the effect of connection position on the structural behaviours. The obtained results show that the plastic hinges of all three specimens are firstly developed to a distance from the column edge, thus revealing that this kind of joint can achieve beam hinge mechanism and prevent joint shear failure. And the connection position is the most disadvantaged when coinciding with the plastic hinge zone, which would result in the excessive deformation and the early failure of the steel bar anchor system. The new type of joint shows good seismic performance during earthquake if the connection can be properly designed, and thus this kind of structural form can be applied to actual engineering structures in seismic regions.
Qiong Liu; Shanghong Chen; Wei Lin; Fanjin Zeng. Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints. Advances in Civil Engineering 2019, 2019, 1 -17.
AMA StyleQiong Liu, Shanghong Chen, Wei Lin, Fanjin Zeng. Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints. Advances in Civil Engineering. 2019; 2019 ():1-17.
Chicago/Turabian StyleQiong Liu; Shanghong Chen; Wei Lin; Fanjin Zeng. 2019. "Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints." Advances in Civil Engineering 2019, no. : 1-17.
A pounding tuned mass damper (PTMD) is introduced by making use of the energy dissipated during impact. In the proposed PTMD, a viscoelastic layer is attached to an impact limitation collar so that energy can be further consumed and transferred to heat energy. An improved numerical model to simulate pounding force is proposed and verified through experimentation. The accuracy of the proposed model was validated against a traditional Hertz-based pounding model. A comparison showed that the improved model tends to have a better prediction of the peak pounding force. A simulation was then carried out by taking the benchmark Canton Tower, which is a super-tall structure, as the host structure. The dynamic responses of uncontrolled, TMD-controlled and PTMD controlled system were simulated under wind and earthquake excitations. Unlike traditional TMDs, which are sensitive to input excitations and the mass ratio, the proposed PTMD maintains a stable level of control efficiency when the structure is excited by different earthquake records and different intensities. Particularly, more improvement can be observed when an extreme earthquake is considered. The proposed PTMD was able to achieve similar, or even better, control effectiveness with a lower mass ratio. These results demonstrate the superior adaptability of the PTMD and its applicability for protection of a building against seismic activity. A parametric study was then performed to investigate the influence of the mass ratio and the gap value on the control efficiency. A comparison of results show that better control results will be guaranteed by optimization of the gap value.
Wei Lin; Gangbing Song; Shanghong Chen. PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations. Applied Sciences 2017, 7, 425 .
AMA StyleWei Lin, Gangbing Song, Shanghong Chen. PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations. Applied Sciences. 2017; 7 (4):425.
Chicago/Turabian StyleWei Lin; Gangbing Song; Shanghong Chen. 2017. "PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations." Applied Sciences 7, no. 4: 425.