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该文发展了钢筋混凝土框架结构强柱弱梁地震整体失效模式可控设计方法。基于能量平衡概念和塑性内力设计机制,提出了改进的能量平衡方程和塑性内力设计方法来实现具有不同滞回性能结构在不同设防烈度下的结构设计。设计了4个具有不同几何配置的结构,并研究了结构沿楼高的强柱弱梁系数分布。分别对结构进行Pushover分析和22条地震下的大震弹塑性时程分析,研究了结构的整体能力曲线、屈服机制、最大层间位移角分布和柱端弯矩需求。分析结果表明,该文所提方法不需要任何迭代便能实现结构预期的抗震性能和整体失效模式,克服了传统抗震设计需不断试凑迭代来满足抗震性能的缺点。
This paper develops a controllable design method for the failure mode of the whole earthquakes with strong columns and weak beams in reinforced concrete framed structures. Based on the concept of energy balance and the design mechanism of plastic internal force, an improved energy balance equation and plastic internal force design method are proposed to realize the structural design of structures with different hysteretic performance under different fortification intensity. Four structures with different geometrical configurations were designed and the distribution of strong column weak beam coefficients along the height of the structure was studied. Pushover analysis of the structure and elastic-plastic time history analysis of 22 earthquakes are carried out separately. The whole capacity curve, yield mechanism, maximum displacement distribution of interlayer and bending moment of column are studied. The analysis results show that the method proposed in this paper can achieve the expected seismic performance and overall failure mode without any iteration, and overcome the shortcoming that the traditional seismic design needs to keep trying and iteratively to meet the seismic performance.