超长隔震结构抗震性能与抗倒塌能力研究

摘要

Using the method of incremental dynamic analysis,the critical seismic peak acceleration of each damage state under the integral and multi-tower structure is derived,and the torsion effect and the seismic collapse resistance capacity are analyzed.Incremental dynamic analysis result shows that,the integral long base-isolated structure are more likely to be destroyed,so the seismic collapse resistance capacity of the multi-tower long base-isolated structure is stronger than the capacity of the integral long base-isolated structure,while the collapse possibilities of two structures is both less than 5％ under the design earthquake,which means that the structure satisfies the security requirements of no collapse under major earthquake.%采用增量动力分析(Incremental Dynamic Analysis,IDA)方法,得到了整体式与多塔式超长隔震结构进入各破坏状态的地震峰值加速度,分析了结构的抗震性能与抗倒塌能力.IDA分析结果表明:与多塔结构相比,整体式结构更易发生破坏,所以多塔结构的抗倒塌能力略强于整体结构,但两个结构在设计大震下的倒塌概率都小于5％,可以认为能达到大震不倒的安全要求.