In order to cultivate the ability of disaster prevention and mitigation design of civil engineering students,this paper takes Technical guideline for maintaining normal functionality of buildings in earthquakes as the core content,and puts forward that buildings meet the normal function requirements when subjected to fortification earthquakes.According to the normal function and damage consequences,the performance objectives of class Ⅰ and Ⅱ buildings are proposed.Guided by the expected seismic resilience goal,a"three-level fortification and two-stage design"strategy for eight types of buildings in two districts is proposed to realize the normal function requirements of the seismic isolation design of Class Ⅰ and Ⅱ buildings,and to improve the ability of buildings to maintain and restore their functions after the earthquake.A medical technology building and a school are selected as typical examples of Class Ⅰ and Class Ⅱ buildings.The expected resilience target is proposed based on the post-earthquake repair cost,repair time and casualties,and the isolation and shock absorption design is carried out according to the resilience fortification strategy.Based on the results of elastic-plastic time history analysis,SAUSG-RES was used to extract engineering demand parameters for toughness grade evaluation.The results show that the structures meet the normal function requirements when subjected to the fortification earthquake after adopting the resilient fortification strategy for eight types of buildings in the two areas.After simple repair,the function can be restored to the level of resilience one star.After moderate repair when suffering a rare earthquake,it can be restored to function and reach a high toughness level.The resilient fortification strategy not only improves the shortcomings of traditional seismic fortification,but also meets engineering design habits,which provides a reference for the higher-order reform of seismic design courses.
关键词
韧性设防策略/隔震技术/减震技术/韧性等级评价/弹塑性时程分析
Key words
resilience fortification strategy/seismic isolation technology/vibration reduction technology/resilience grade evaluation/elastic-plastic time history analysis
维普
万方数据