Restoring force model for bolted-connection assembled shear wall
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(1.College of Civil Engineering, Fuzhou University, Fuzhou 350108, China; 2.School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China)

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TU398.2

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    Abstract:

    In order to further improve the construction efficiency and structural integrity of precast reinforced concrete (RC) shear walls, a bolted-connection assembled shear wall (BASW) with integrated steel connection joints was proposed, including fully assembled shear wall and semi-assembled shear wall with cast-in-place edge members at both ends. One piece of the cast-in-place ordinary concrete shear wall, three pieces of the fully assembled shear wall, and three pieces of the semi-assembled shear wall were designed. The comparison parameters were assembly methods and shear-span ratio, and quasi-static tests were carried out. Test results show that the shear-span ratio and assembly methods had significant impact on the seismic performance of the shear wall. Due to the connecting steel frame, the failure surface of the fully assembled shear wall was lifted, and the peak bearing capacity was higher than that of cast-in-place and semi-assembled shear walls with the same shear-span ratio. Combined with numerical analysis, the influences of the parameters such as assembly rate, shear-span ratio, axial compression ratio, edge component hoop ratio, and edge component size on the skeleton lines and hysteretic performance of the specimens were studied. According to the results, the three-fold skeleton line model and restoring force model of the new type BASW were established. It was found that the proposed restoring force model was in good agreement with the test curves, which can reflect the hysteretic performance of the wall. This indicates that the models can be used for the elastoplastic analysis of these types of BASWs.

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History
  • Received:June 16,2021
  • Revised:
  • Adopted:
  • Online: March 21,2022
  • Published:
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