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Dynamic-MFA examination of Chilean housing stock: long-term changes and earthquake damage

机译：智利房屋库存的动态MFA检查：长期变化和地震破坏

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摘要

The dynamics and metabolism of the built environment are important for understanding the construction, renovation and demolition activities that characterize its long-term physical development. Previous research on building stock development is limited, particularly for developing countries. As one of the most seismically active countries in the world, Chile's built environment is constantly subjected to losses. This study included earthquake vulnerability and damage in a dynamic material flow analysis (MFA) of the Chilean housing stock. Stock and flows of residential floor area were modelled using population and life style parameters. Demolition was modelled assuming a constant demolition rate. By characterizing the building stock according to vulnerability classes and establishing a mass balance per class, the effects of different typology distributions on the overall damage to the stock caused by earthquakes could be assessed. Scenarios with different trends in typology distribution for new construction and renovation suggest that significant potential exists for reducing future earthquake damage in the Chilean housing stock. This is best achieved by gradually reducing the vulnerability of buildings to earthquakes. Legislation, building standards and financial instruments could be used to ensure such reductions in earthquake damage and thereby provide socio-economic benefits in the future.
机译：建筑环境的动力学和新陈代谢对于理解表征其长期身体发展的建筑，装修和拆除活动非常重要。先前有关建筑存量发展的研究是有限的，特别是对于发展中国家。作为世界上地震最活跃的国家之一，智利的建筑环境不断遭受损失。这项研究在智利房屋库存的动态物质流分析（MFA）中包括地震易损性和破坏。使用人口和生活方式参数对住宅建筑面积的存量和流量进行建模。假定拆除速度恒定，对拆除进行建模。通过根据易损性等级对建筑存量进行表征并建立每个类别的质量平衡，可以评估不同类型的分布对地震对存量造成的总体损害的影响。新建筑和装修的类型分布趋势不同的情况表明，存在很大的潜力来减少智利房屋建筑群中未来的地震破坏。最好通过逐渐减少建筑物对地震的脆弱性来实现。立法，建筑标准和金融工具可用于确保减少地震破坏，从而在未来提供社会经济利益。

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