| dc.description.abstract | Driven by demand for sustainable buildings, mass timber, specifically cross-laminated timber (CLT), is being more widely used in mid-rise buildings in the US. In areas of the US with a significant seismic (i.e., earthquake) hazard, mass timber buildings that are seismically resilient are of significant interest. Low damage post-tensioned self-centering (SC) CLT shear walls (SC-CLT walls) provide an opportunity to develop seismically resilient CLT buildings. There is however insufficient knowledge of the lateral-load response and damage states of SC-CLT walls under multidirectional seismic loading conditions, which can have a pronounce effect on the seismic resilience of buildings with SC-CLT walls. In order to fill this knowledge gap, a series of lateral-load tests were performed at the NHERI Lehigh Large-Scale Multi-directional Hybrid Simulation Experimental Facility to investigate the multidirectional loading behavior of a low damage, resilient three-dimensional CLT building sub-assembly. This sub-assembly was comprised of SC-CLT shear walls, a CLT floor diaphragm, collector beams, and gravity load system. Comparisons are made between the experimental lateral-load response of SC-CLT walls under unidirectional and multi-directional cyclic loading. The data is used to develop fragility functions for assessing the potential damage to SC-CLT walls under unidirectional and multi-directional loading. The results from the research indicate that multi-directional loading on SC-CLT walls, such as that which occurs during an earthquake, leads to an increase in the damage and reduction of the SC-CLT wall’s resiliency compared to SC-CLT walls subjected to unidirectional lateral loading. | |
