Reduction of Large Seismic Deformations using Elasto-plastic Passive Energy Dissipaters
Reduction of Large Seismic Deformations using Elasto-plastic Passive Energy Dissipaters
复制标题
使用弹塑性被动耗能器减少大地震变形
DOI：
10.14429/dsj.53.2134
复制
发表时间：
2003
影响因子：
0.9
通讯作者：
Sarma
中科院分区：
文献类型：
--
作者：
K. S. Kumar;K. Muthumani;N. Gopalakrishnan;B. Sivarama;Sarma
在很高的温度下输送剧毒或放射性液体的管道的支撑系统设计是核电设施安全方面的一个重要问题。这些管道系统通常被设计成由传统的缓冲器支架保持刚性，以防止地震。管道系统的设计必须平衡地震变形和其他热效应引起的变形。采用传统缓冲支承的刚性管道系统往往会导致温度应力的增加，因此合理的管道支承体系的抗震设计是非常必要的。与这种刚性设计相反的是，可以设计一个柔性管道系统，并通过使用耗散振动能量的被动能量吸收(PEA)单元来增加阻尼来降低地震反应。X形或沙漏形金属元件是金属屈服型弹塑性被动吸能器的经典例子。利用钢等金属固有的延展性，在塑性区域内经历稳定的能量耗散，以实现能量损失。本文对用于控制地震作用下管道大地震变形的被动耗能装置中的屈服型弹塑性PEA单元进行了试验和分析研究。
The design of supporting systems for pipelines carrying highly toxic or radioactive liquids at very high temperature, is an important issue in the safety aspect for a nuclear power installation. These pipeline systems are normally designed to be held rigid by conventional snubber supports for protection from earthquake. The pipeline system design must balance the seismic deformations and other deformations due to thermal effect. A rigid pipeline system using conventional snubber supports always leads to an increase in thermal stresses, hence a rational seismic des~gn for pipeline supporting systems becomes essential. Contrary to this rigid design, it is possible to design a flexible pipeline system and to decrease the seismic response by increasing the damping using passive energy absorbing (PEA) element, which dissipates vibration energy. An X-shaped or a hourglass-shaped metal element is a classic example of elasto-plastic passive energy absorber of metallic yieldingtype. The inherent ductile property of metals like steel, which undergoes stable energy dissipation in the plastic region, is made use of in achieving energy loss. This paper presents the experimental and analytical studies carried out on yielding-type elasto-plastic PEA elements to be used in a passive energy dissipating device for the control of large seismic deformations of pipelines subjected to earthquake loading.