Mobile home fragility curves

Seismic fragility of mobile (manufactured) homes is investigated. Compiled is a catalog of home performance in past earthquakes. Intensity measures causing damage are characterized by peak ground acceleration and velocity. Damage is defined as when the home is knocked out of position necessitating repairs and re-installation. Four categories of support conditions are identified: unanchored, tie-downs, proprietary systems, and perimeter wall foundations. Suggested fragility curves for unanchored homes and homes with tie-downs are derived from computer simulations. As a benchmark, a fragility curve for proprietary and perimeter wall systems is taken as the same as that for conventional wood homes. Shortcomings of using tie-down and proprietary systems in high seismic zones are discussed. The suggested fragility curves account for the different categories of support conditions thereby representing advancement to those in the Hazus national standardized risk modeling methodology.

Chimneys and mobile homes in 2018 Anchorage earthquake

The seismic performance of chimneys associated with permanent residential dwellings and mobile (manufactured) homes is documented via onsite reconnaissance including interviews with Anchorage building officials and contractors familiar with the earthquake damage and recovery efforts. Relatively few chimneys suffered structural damage, and there was no evidence of mobile homes shifting or toppling. The lack of damage is attributed to relatively modest shaking intensities and qualities of the housing inventory. State-of-practice fragility curves are assessed by comparison to observed damage.

RANDOM WALKS AND MARKET EFFICIENCY: EVIDENCE FROM REAL ESTATE INVESTMENT TRUSTS (REIT) SUBSECTORS

This paper investigates the random walk behavior of real estate investment trust (REIT) subsectors using monthly return data from January 1994 to July 2015. Using variance ratio tests, we examine subsectors of lodging/resorts and self-storage and find that they do not follow a random walk, contradicting the weak-form efficient market hypothesis. Non-parametric runs tests help us find that office, industrial, mixed, free standing, shopping centers, apartments, manufactured homes, and timberland subsectors are weak-form efficient. The evidence in this study supports the idea that some subsec-tors are more informationally efficient than other subsectors.