Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-10-01

Journal: JOURNAL OF ENGINEERING MECHANICS

Included Journals: Scopus、SCIE

Volume: 139

Issue: 10

Page Number: 1395-1406

ISSN: 0733-9399

Key Words: Electric transmission structures; Seismic design; Energy dissipation; Earthquake engineering; Structural control; Damping; Earthquake resistant structures; Impact forces; Impact tests; Seismic design; Energy dissipation; Earthquake engineering; Structural control; Damping; Earthquake-resistant structures; Impact forces; Impact tests

Abstract: Lattice transmission towers are vital components of transmission line systems, which play an important role in the operation of electrical power systems. This paper proposes a new type of tuned mass damper (TMD), the pounding tuned mass damper (PTMD), to upgrade the seismic resistant performance of a transmission tower. In the PTMD, a limiting collar with viscoelastic material laced on the inner rim is installed to restrict the stroke of the TMD and to dissipate energy through collision. The pounding force is modeled based on the Hertz contact law, whereas the pounding stiffness is estimated in a small-scale test. A multimass model of a 55-m tower is established to verify the effectiveness of the PTMD numerically. Harmonic excitation and time-history analysis demonstrate the PTMD's superiority over the traditional TMD. Finally, a parametric study is performed for the optimal design.