Experimental study on bi-lateral seismic performance of precast hollow core wall using shaking table
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Two geometrically identical full scale precast hollow core wall panels are constructed together with their foundations beam. These walls are tested under bi-lateral loading using a biaxial displacement controlled clover-leaf displacement pattern. The wall panels are designed in accordance with a Damage Avoidance Design philosophy to carry wind, roof and seismic loading. The walls are detailed with steel-armouring at their wall-foundation interface to provide some damage protection against seismic attack. Moreover, longitudinal prestress strands wires together with unbonded posttensioned tendons allow the wall panels to rock back and forth on their foundations. Mechanical energy devices are also added to these walls to provide supplemental damping. A shaking table is used in slow motion to perform the bi-lateral quasi-static experiments for both walls. Experimental results show that due to the damage avoidance design details both walls perform very well under biaxial load paths without any discernable structural damage up to 2.0% drift. Visual observations demonstrated that precast hollow core walls do not experience any cracks or spalling of concrete as compared to fixed-base monolithic wall panels and slender walls. Thus, precast hollow core wall panels are recommended to use in the construction of warehouse/industrial buildings especially in seismic prone regions. 2006 by School of Engineering and Technology, Asian Institute of Technology.
