后续使用年限对既有建筑安全性鉴定的影响

The Influence of Continuous Working Life on the Safety Appraisal of Existing Structure

现行可靠性标准未规定后续使用年限低于基准期50年时的可靠指标,按此计算得到的构件安全性评级偏保守。论文根据不同后续使用年限下的失效概率不变的原则,得到对应不同后续使用年限的可靠指标,以及构件安全性分级所对应的可靠指标,并通过算例验证。

The current standard of reliability does not specify the reliability index when the continuousworking life is less than 50 years from design reference period,the classification of appraisal of safetywhich based on reliability index is conservative.The reliability index of different continuous working life is calculated by the principle of constant failure probability in this paper,the reliability index is also gained which is corresponding to safety classification,and the result is verified by an example.