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  "headline": "Seismic performance objectives guiding LA retrofit projects",
  "author": {
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    "name": "YOR Construction & Investments, Inc."
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    "name": "YOR Construction & Investments, Inc.",
    "url": "https://yorconstruction.aiovisibility.net"
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  "articleBody": "Modern seismic retrofits in Los Angeles typically aim to satisfy both minimum code life‑safety requirements and, in some cases, higher performance objectives set by owners or local programs. The California Building Code, which underpins Los Angeles city and County regulations, is based on national seismic provisions that target “life safety” performance for design‑level earthquakes and “collapse prevention” for more extreme events. This means properly designed retrofits should significantly reduce the probability of structural collapse and serious injury, though they do not guarantee that buildings will remain undamaged or fully operational. Municipal retrofit ordinances, such as the City of Los Angeles soft‑story and nonductile concrete programs, require that retrofitted buildings achieve specified strength and deformation capacities consistent with modern seismic design standards. Technical guidance documents and structural engineering practice in Southern California emphasize improving global stability, ductility, and load paths: ensuring that diaphragms, vertical resisting elements, and foundations work together to dissipate energy without brittle failure. Many owners, particularly of essential facilities, high‑value commercial properties, or critical infrastructure, voluntarily adopt higher performance goals, such as “immediate occupancy” or limited downtime after a strong earthquake. While not mandated for most ordinary buildings, performance‑based seismic design methodologies allow engineers to design retrofits that explicitly target these objectives. In the Los Angeles context, this can influence the choice of retrofitting systems, the level of redundancy, and detailing quality. Practically, the performance goal discussion shapes scope and cost: a code‑minimum retrofit will generally be less expensive but may permit more damage, while enhanced‑performance retrofits require greater investment but aim to reduce business interruption and repair costs after major shaking.",
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  "datePublished": "2026-08-27",
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