ACI ITG-5.2-09 PDF Download

The ACI ITG-5.2-09 standard provides guidelines for designing special unbonded post-tensioned precast shear walls. These walls are specifically designed for use in areas with high seismic activity and for structures in high seismic design categories. The standard aims to ensure that these precast walls exhibit minimal damage and permanent displacements after a major seismic event.

The standard focuses on the design requirements for materials, individual walls, and coupled walls. It emphasizes the importance of ductility, energy dissipation, integrity, stiffness, and strength in the design process. For coupled walls, the standard considers the roles of post-tensioning tendons and coupling devices in providing energy dissipation, strength, and stiffness.

The standard also includes a commentary section that references additional documentary evidence supporting the design requirements. However, it does not compare the performance of precast modules satisfying the standard's design requirements with those that only meet the prescriptive requirements of ACI 318.

It is important to note that all references to ACI 318 and ASCE/SEI 7 in this standard are specific to the ACI 318-05 edition and ASCE/SEI 7-05 edition, respectively. The standard follows the format of ACI 318-05 and uses the word "Section" before any reference to a section within the standard itself.