【摘要】 合理有效地控制地震作用下建筑结构的损伤机制,是提高建筑结构抗震性能的重要手段。体系设计、需求分析和构件设计是结构损伤机制控制的三个主要方面。在总结建筑结构抗震损伤机制控制发展过程的基础上,着重于需求分析,建议了一套基于建筑结构损伤机制控制的抗震设计方法。该方法采用两阶段设计:在多遇地震设计阶段,采用线弹性分析给出结构预期损伤部位的承载力需求;在罕遇地震设计阶段,采用等效线性化法定量给出结构在罕遇地震作用下实现预期损伤机制下损伤部位的变形能力需求和非损伤部位的承载力需求,为构件的抗震设计提供依据。通过一个钢筋混凝土延性框架结构算例说明了建议方法的实施流程,并通过动力弹塑性分析评价了建议方法的效果。分析结果表明,与现行规范方法相比,建议方法更有助于预期损伤机制的实现。更多还原

【Abstract】 Damage mechanism control is an effective way of enhancing the seismic performance of building structures,where system design,demand analysis and member design are the three essential aspects.A brief review of the development history of seismic structural systems in the sense of damage mechanism control is followed by the proposal of a damage mechanism control-based seismic design methodology which incorporates a two-phase design procedure.In the first phase,linear elastic analysis is used to determine the strength demand for potentially inelastic members.And in the second phase,equivalent linear analysis is used to quantitatively determine the deformability demands for potentially inelastic members and strength demands for other members in order to achieve the desirable damage mechanism.These demands form the basis for the proportioning and section design of each structural member.An example of reinforced concrete ductile moment-resisting frame is provided to demonstrate the implementation of the proposed design method.Nonlinear dynamic analysis is conducted to evaluate its effectiveness.Results show that the proposed method can better ensure the desirable damage mechanism.更多还原