The strong ground motion generated by an earthquake considerably damages the infrastructure. Earthquake-resistant design of the structure makes it capable of withstanding surface waves. However, an additional cloak is recommended to dampen very strong surface waves. In this study, a new eco-friendly and sustainable cloaking method is suggested to dampen strong surface waves without damaging surrounding infrastructure. For this purpose, a physical model was built to simulate and compare the outcomes of the new cloaking method with old-fashioned meta-barriers. The model consisted of an assembly of a vibration generator and an Arduino-based accelerometer to record ground vibrations in terms of g-values. The meta-barriers were simulated as follows: concentric rings of earthen material with different densities and configured concentric rings of a hollow cylinder made of polymeric material. The new cloaking method is based on e-brick, a non-recyclable plastic bottle stuffed with plastic waste. In this cloaking technique, a trench was excavated and back-filled with e-bricks to attenuate strong surface waves. Results showed that overall g-values recorded by the e-brick method were found 54–60%, 43–48%, and 39–47% less than no shadow zone, density contrast, and hollow cylindrical methods respectively. It shows that the e-brick method has a competitive edge over traditional meta-barrier techniques. It damps the vibrations and protects the surrounding infrastructures by converting vibrational energy into heat and sound. The outcomes of the proposed research can be recommended as a reference in waste disposal management systems, geotechnical earthquake engineering, foundation designing, and infrastructure protection.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

Designing of Meta-barriers Using a Novel Cloaking Method to Attenuate Strong Ground Motion

  • Umer Waqas,
  • Maria Iqbal,
  • Mohamed Ezzat Al-Atroush

摘要

The strong ground motion generated by an earthquake considerably damages the infrastructure. Earthquake-resistant design of the structure makes it capable of withstanding surface waves. However, an additional cloak is recommended to dampen very strong surface waves. In this study, a new eco-friendly and sustainable cloaking method is suggested to dampen strong surface waves without damaging surrounding infrastructure. For this purpose, a physical model was built to simulate and compare the outcomes of the new cloaking method with old-fashioned meta-barriers. The model consisted of an assembly of a vibration generator and an Arduino-based accelerometer to record ground vibrations in terms of g-values. The meta-barriers were simulated as follows: concentric rings of earthen material with different densities and configured concentric rings of a hollow cylinder made of polymeric material. The new cloaking method is based on e-brick, a non-recyclable plastic bottle stuffed with plastic waste. In this cloaking technique, a trench was excavated and back-filled with e-bricks to attenuate strong surface waves. Results showed that overall g-values recorded by the e-brick method were found 54–60%, 43–48%, and 39–47% less than no shadow zone, density contrast, and hollow cylindrical methods respectively. It shows that the e-brick method has a competitive edge over traditional meta-barrier techniques. It damps the vibrations and protects the surrounding infrastructures by converting vibrational energy into heat and sound. The outcomes of the proposed research can be recommended as a reference in waste disposal management systems, geotechnical earthquake engineering, foundation designing, and infrastructure protection.