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开发中的延性装配式支撑体系(CMDB)可代替特殊同心斜撑框架。CMDB体系在支撑的端部和中心引入铸钢构件,试图建立一个具有可靠的强度、刚度和变形能力的体系。铸造构件选择十字形截面,这种截面形式能够提高能量耗散能力、延长低周疲劳寿命,从而减少断裂的发生。建立了描述与主要中空结构构件相关的铸钢部件的轴向强度和弯曲强度设计参数。这些参数在二维有限元模型中是不断变化的,由此了解体系的特性并确定最佳设计方案。将CMDB体系和标准特殊同心斜撑框架的三维有限元模型与断裂指标相结合,用于比较两个系统的低周疲劳寿命。
The development of the ductile mounted support system (CMDB) can replace the special concentric braces. The CMDB system introduces cast steel components at the ends and centers of the supports in an attempt to establish a system of reliable strength, stiffness and deformability. Cast members choose cruciform cross-section, this cross-sectional form can improve the energy dissipation capacity, extend the low cycle fatigue life, thereby reducing the occurrence of fracture. The design parameters describing the axial strength and bending strength of the cast steel components associated with the major hollow structural members were established. These parameters are constantly changing in the two-dimensional finite element model to understand the characteristics of the system and determine the best design. The three-dimensional finite element model of CMDB system and standard special concentric braces was combined with the fracture index to compare the low cycle fatigue life of the two systems.