{'fraction_non_alphanumeric': 0.018756169792694965, 'fraction_numerical': 0.0019743336623889436, 'mean_word_length': 5.71523178807947, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A novel passive structural control device using high-performance NiTiHfPd material

This study proposes a super-elastic memory alloy re-centering damper device and investigates its performance in improving the response of steel frame structures subjected to multi-level seismic hazard. The proposed super-elastic memory alloy re-centering damper (SMARD) counts on high-performance shape memory alloy (SMA) bars for recentering capability and employs friction springs to augment its deformation capacity. An analytical model of sixstory steel special moment frame buildings with installed SMARDs is developed to determine the dynamic response of the building. Then, nonlinear response time history analyses are conducted to assess the behavior of controlled and uncontrolled buildings under 44 ground motion records. Results show that SMARDs can enormously mitigate the dynamic response of steel frame structures at different seismic hazard levels and, at the same time, enhance their postearthquake functionality.