【摘要】 砖混结构建筑易损性和所处地震环境是影响砖混结构建筑抗毁性分析的关键因素,当前针对中强地震下砖混结构建筑的抗毁性分析存在较大难度,大多依靠地震后建筑受损毁程度分析砖混结构建筑的抗毁性,分析得到的抗毁性结果误差较高,需要深入分析中强地震下砖混结构建筑抗毁性,采用砖混结构建筑振动模型分析地震下建筑各楼层位移变化,确定砖混结构建筑在不同破坏性地震下的受损规律,在此基础上,设计地震动砖混结构建筑加固模型,采用最小二乘法拟合中强地震下加固模型的地震动功率,构建中强地震下砖混结构建筑抗毁性估计模型,预测建筑抗毁系数随机均值谱变化情况,采用实验验证该方法的应用效果,证实该方法的有效性。更多还原

【Abstract】 The vulnerability to earthquakes of brick-concrete structures are key factors affecting their invulnerability analysis. At present, it is difficult to analyze the invulnerability of brick-concrete structures under moderate-strong earthquakes. The invulnerability of brick-concrete structures is often analyzed according to the post-earthquake degree of damage to the building, and the error of analysis results is relatively high. To more deeply study the invulnerability of brick-concrete structures under moderate-strong earthquakes, the displacement change of each floor of a building under earthquake conditions was analyzed using the brick-concrete structure vibration model, and the damage law of the brick-concrete structure under different destructive earthquakes was determined. On this basis, the brick-concrete structure reinforcement model was designed, and the least square method was used to fit the power of ground motion under moderate-strong earthquakes. The invulnerability estimation model of brick-concrete structures under medium-strong earthquakes was then constructed to predict the variation in the random mean spectrum of the invulnerability coefficient. Finally, the application effect and effectiveness of the method was verified by these experiments.更多还原