Seismic Design of Partially Post-Tensioned Precast Concrete Walls

摘要

style="text-align: left;">This paper proposes a seismic design approach for precast concrete structural walls that use a combination of mild steel and high strength post-tensioning steel reinforcement across horizontal joints for flexural resistance. The mild steel reinforcement is designed to yield in tension and compression, providing inelastic energy dissipation. The post-tensioning steel provides self-centering capability,  reducing the residual (i.e., permanent) lateral displacements of the wall due to a large earthquake. The proposed design approach is a performance-based approach that aims to limit the wall lateral  displacements to an allowable target displacement. The design approach is critically evaluated based on nonlinear static and  nonlinear dynamic time history analyses of two prototype walls. A design   example is provided at the end of the paper. >References style="text-align: left;">1. Kurama, Y., href="http://dx.doi.org/10.15554/pcij.09012002.36.59 " title="a€?Hybrid Post-Tensioned Precast Concrete Walls for Use in Seismic Regions,a€?" target="_blank">a€?Hybrid Post-Tensioned Precast Concrete Walls for Use in Seismic Regions,a€? PCI JOURNAL, V. 47, No. 5,  September-October 2002, pp. 37-59. style="text-align: left;">2. Rahman, A., and Restrepo, J., a€?Earthquake Resistant Precast Concrete Buildings: Seismic Performance of Cantilever Walls Prestressed Using Unbonded Tendons,a€? Report No. 2000-5, Department of   Civil Engineering, University of Canterbury, Christchurch, New Zealand, 2000. style="text-align: left;">3. Holden, T., Restrepo, J., and Mander, J., a€?A Comparison of the Seismic Performance of Precast Wall Construction: Emulation and Hybrid Approaches,a€? Rep. No. 2001-4, Department of Civil Engineering, University of Canterbury, Christchurch, New Zealand, 2001. style="text-align: left;">4. Holden, T., Restrepo, J., and Mander, J., href="http://dx.doi.org/10.1061/(asce)0733-9445(2003)129:3(286) " title="a€?Seismic Performance of Precast Reinforced and Prestressed Concrete Walls,a€?" target="_blank">a€?Seismic Performance of Precast Reinforced and Prestressed Concrete Walls,a€? Journal of Structural Engineering, ASCE, V. 129, No. 3, March 2003, pp.  286-296. style="text-align: left;">5. Restrepo, J., a€?Self-Centering Precast Post-Tensioned Cantilever Walls - Theory and Experimental Work,a€? ASCE Structures Congress, Seattle, WA, May 29-31, 2003. style="text-align: left;">6. Cheok, G., and Stone, W.,  a€?Performance of 1/3-Scale Model Precast Concrete Beam-Column Connections Subjected to Cyclic Inelastic Loads - Report No. 4,a€? NISTIR 5436, National Institute of  Standards and Technology (NIST), Gaithersburg, MD, June 1994. style="text-align: left;">7. Stone, W., Cheok, G., and Stanton, J., href="http://dx.doi.org/10.14359/1145 " title="a€?Performance of Hybrid Moment-Resisting Precast Beam-Column Concrete Connections Subjected to Cyclic Loading,a€? " target="_blank">a€?Performance of Hybrid Moment-Resisting Precast Beam-Column Concrete Connections Subjected to Cyclic Loading,a€? ACI Structural Journal, V. 91, No. 2,  March-April 1995, pp. 229-249. style="text-align: left;">8. Stanton, J., Stone, W., and Cheok, G., href=" http://dx.doi.org/10.15554/pcij.03011997.20.23 " title="a€?A Hybrid Reinforced Precast Frame for Seismic Regions,a€?" target="_blank">a€?A Hybrid Reinforced Precast Frame for Seismic Regions,a€? PCI JOURNAL, V. 42, No. 2, March-April 1997, pp. 20-32. style="text-align: left;">9. Cheok, G., Stone, W., Kunnath, S.,  href="http://dx.doi.org/10.14359/567 " title="a€?Seismic Response of Precast Concrete Frames with Hybrid Connections,a€?" target="_blank">a€?Seismic Response of Precast Concrete Frames with Hybrid Connections,a€? ACI Structural Journal, V. 95, No. 5, September-October 1998, pp. 527-539. style="t