Smart ties for the retrofit of arches and vaults
Metallic tie-rods are frequently used in arches and vaults to absorb the lateral thrusting forces due to gravity loads or inertial forces caused by an earthquake.Traditional tie-rods,however,have some limitations(e.g.sensitivity to temperature variations,buckling under compression,etc.).Shape Memory Alloys(SMAs)can be used to enhance the performances of metallic tie-rods both in service and seismic conditions.This is achieved with the Tensioning Control Block(TCB)system.The basic components of TCB are prestrained superelastic SMA wires,in series with the metallic tie-rod.The number and diameter of the SMA wires is selected based on the force levels to reach.The length is optimised with respect to the thermal behaviour of the system.A number of theoretical and experimental studies have been conducted to fully understand the thermal and mechanical behavior of TCB.In the paper,the main outcomes of these studies are described.
Shape Memory Alloys Arches and vaults Thermal behavior Seismic loading
M. Dolce D. Cardone
Italian Dept.of Civil Protection,Rome,Italy DiSGG-University of Basilicata,Potenza,Italy
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）