Cost-benefit Analysis of Reinforcement Policies on Rammed Earth Dwellings in Yunnan Province of China

Authors: Yaan Wang*, Beijing Normal University, Ming WANG, Beijing Normal University, Kai Liu, Beijing Normal University
Topics: Hazards, Risks, and Disasters, China
Keywords: cost-benefit analysis,reinforcement policies,rammed earth dwellings
Session Type: Illustrated Paper
Day: 4/11/2018
Start / End Time: 5:20 PM / 7:00 PM
Room: Canal St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded


Rammed earth dwellings are widely seen in Yunnan province of China. Due to the high poverty ratio in the region, most rammed earth dwellings are extremely vulnerable to earthquake. Thus, an economic, environmental-friendly and less-intervention seismic retrofitting technique is required to reinforce these dwellings so as to increase regional seismic capability. An innovative and promising reinforcement technique is investigated to enhance the seismic behavior of the rammed earth walls by externally boned tarpaulins, which can delay cracks appearing and prevent existing cracks from propagating. With the confirmation of effectiveness of the new technique through a series of push-over and shake table experiments, this paper focuses on the assessment of seismic capability of earth dwellings distributed in different regions of Yunnan Province and the corresponding cost-benefit analysis of applications of this reinforcement technique. Based on the geographic distribution of rammed earth dwellings and the variation of seismic hazards, the cost in terms of materials varied by reinforcement styles and labor fees, and benefit with integrated consideration of both increased seismic capacity and regional seismic risk, are estimated at county level. The results provide cost-benefit assessment of various reinforcement policies through which government invests to reduce regional vulnerability.

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