Elasto-plastic Analysis of Reinforced Concrete Shear Wall with Openings Using a Macro Model

摘要

In this study, a modified macro-model of a reinforced concrete shear wall was proposed, where the model was composed of column elements and strut-and-tie elements which represent the wall parts. The proposed model was established by modifying the model proposed by TAKEHARA et al. to obtain more accurate load-deformation relationships in the case of multi-story walls with eccentric openings. The main modified items are the constitutive law for the concrete and the additional modeling of the concrete struts and tension ties located around the openings. With respect to the former item, the Vecchio-Collins modified constitutive law of concrete compressive strength was used to take the transverse tensile strain into account, while the Popovic's constitutive law had been used in the model proposed by TAKEHARA et al. The proposed model was applied to two of the three-storied reinforced concrete shear walls with eccentric openings, where the adjacent walls between the stories were connected by rigid beam elements and the springs expressed by bi-linear models. The results obtained from the proposed model were compared with those from experiments and the model by TAKEHARA et al., and the adequacy of the proposed model was confirmed.