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The Eruption of Nevado Del Ruiz Volcano Colombia, South America, November 13, 1985 (1991) / Chapter Skim
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3 Performance of Various Structures along the Lahar Paths
Pages 43-48

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From page 43...
... Very little debris was noted throughout the city center, since most of it had been transported several kilometers to the southeast. In southeast Armero, in a downstream direction, numerous structures were at least half buried in the lahar, yet most of the walls remained erect.
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From page 44...
... 44 THE NEVADO DEL RUIZ VOLCANO FIGURE 3.1 A comer pillar of the building shown in Figure 2.12, showing concrete abraded to expose rebar. This degree of abrasion is particularly noteworthy given the short duration of the event.
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From page 45...
... Although the structural framework of the warehouse generally remained intact, some of the lower concrete block walls filling in between structural framework elements were carried out by the mudflow. The block walls removed were on that side of the building nearest the creek where the level of mudflow was higher and the removed walls were totally submerged in the mudflow.
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From page 46...
... Pillars are cracked and bent in the downstream direction. (Photo by R
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From page 47...
... , was highly fluid, and moved rapidly. The scour of valley walls generated by the high flow resulted in the removal of sufficient foundation materials at the base of the bridges and buildings along this channel to cause partial collapse and serious structural damage to several buildings (Figure 3.3~.
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From page 48...
... 48 THE NEVADO DEL RUIZ VOLCANO FIGURE 3.3 Foundation damage to apartment buildings in Honda along the channel of the Guali River. (Photo by R
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Key Terms

  • remained erect
  • block walls
  • structural framework
  • concrete block
  • structural damage

  • highly fluid
  • foundation materials
  • reinforcing bars
  • walls generated
  • lahar paths

  • elements due
  • failure beneath
  • santo domingo
  • vertical support
  • beneath structures

  • ground failure
  • bridge subdeck
  • postconsolidation tension
  • located approximately
  • concrete column

  • moderate damage
  • totally submerged
  • valley farther
  • roof support
  • support framing

  • foundation soils
  • building nearest
  • transport reduced
  • removed walls
  • various structures


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