Establishment of damage controlling design methods for reinforced concrete structures

研究了钢筋混凝土建筑结构的损伤控制设计方法。内容包括损伤类型和程度的评估，损伤预测方法的提出和评价，考虑裂缝和残余变形的损伤准则的建立，利用新型耗能装置的损伤控制系统的建议。在非结构墙体周围设置消能器来控制建筑结构的损伤。制作了7个试件，考察了节点数量和位置、缝隙宽度、钢筋锚固方式等因素对结构抗震性能的影响，并建立了设置粘弹性阻尼器的柱子，用于控制钢筋混凝土结构的地震反应和破坏。对三层钢筋混凝土框架试件进行了动力试验，考察了阻尼器的作用效果，并建立了有限元模型来模拟钢筋混凝土建筑结构中钢筋的粘结性能和应力重分布。通过对7个钢筋混凝土偏心洞口结构墙体的损伤评估，考察了洞口大小和位置对墙体损伤的影响。结果表明，现行设计规范和准则可以适用于较大的洞口。

Damage controlling design methods for reinforced concrete building structures were studied. The scope was the evaluation of type and degree of damage, proposal of damage prediction methods and evaluation of these methods, establishment of damage criteria considering cracking and residual deformation, proposal of damage controlling system utilizing new energy dissipating devices.Energy dissipaters were placed around nonstructural walls to control the damage of building structures. Seven specimens were made to see the effect of number and location of connections, width of slit, method of reinforcement anchorage.Columns with visco-elastic dampers was built for the reinforced concrete condominiums to control the seismic response and damage. Dynamic test was conducted on three story reinforced concrete frame specimens to see the effect of dampers.Finite element model was built to simulate the bond behavior of reinforcement and stress redistribution in reinforced concrete building structures. It was demonstrated that the model is able to predict crack widths at different level of loading stage due to its ability of redistribute the stress accurately.Damage evaluation was conducted on seven reinforced concrete structural walls with eccentric openings to see the effect of opening size and locations. It was shown that the current design codes and guidelines can be applied to the larger openings.