For the earthquake resistant analysis of actual engineering structures, most of structural systems have the properties of non-proportional (non-classical) damping, I.
在实际工程结构的抗震研究中，一般结构体系都具有非比例阻尼特性。
2
Earthquake is a sudden, devastating natural disaster, so, seismic design for the civil engineering structure is an important aspect of structural design.
地震是一种突发性、毁灭性的自然灾害，所以在土木工程中抗震设计是结构设计的重要内容。
3
As to construction structuralengineering, making its structure not or reduce the destruction thus reduce the earthquake disaster is vital significance.