鋼斜撐構架因其強度和優越的耗能能力，常被用於建築設計中以抵抗地震。然而，當地震引起較大變形時，斜撐構件容易發生挫屈，導致震後需要昂貴的修復和復原工作。本研究旨在設計和測試一種新型彈性斜撐，以改善現有結構的性能。這種新設計結合了兩個預先分離的斜撐段，並在其中加入了兩個鋼鉤形阻尼器 (SHDs)。SHDs 經過特殊設計，採用彎曲、錐形的形狀，使其在拉伸或壓縮載荷下能均勻地屈服，從而提供穩定的能量消散方式。為了確定此設計的性能，研究對 SHDs 元件和採用不同變體 SHDs 的彈性斜撐構件進行了循環加載測試。測試結果證明，SHDs 具有可靠且穩定的載荷承載能力，而新型斜撐設計則展現出顯著的強度和消散大量能量的能力。測試還顯示，新設計實現了極高的等效黏滯阻尼比，範圍從 35% 到 42%。結構在等效黏滯阻尼、強度和耗能能力的提升，證實了這種新設計方法適用於抗震設計。隨後進行了進一步研究，以評估這種包含預分離斜撐段和 SHDs 的新型彈性斜撐設計是否能改善建築物的抗震性能。結果顯示結構強度有顯著提升，斜撐構架的強度約為彎矩構架的 1.7 倍。在 5% 的層間側向變位下，實現了 21% 至 23.6% 的顯著等效黏滯阻尼。此外，斜撐構架的耗能能力比彎矩構架高出 0.87 至 1.53 倍。這種性能提升透過對多跨多層結構的非線性時程分析持續進行了驗證，證實了該斜撐系統的有效性。在相似的基礎剪力需求下，斜撐構架展現出卓越的性能，顯著降低了殘餘變形。具體來說，與彎矩構架相比，最大層間側向變位降低了 25% 到 48%，殘餘側向變位降低了 19% 到 47%。觀察到的性能改善清楚地證明了所提出的裝置適用於提升建築物的抗震性能。;Steel braced frames are frequently used in building designs to withstand earthquakes due to their strength and superiority at energy dissipation. However, when earthquakes cause large deformations, the braces are tent to buckle, which results in expensive repairs and rehabilitation after the event. This research aims to create and test a new resilient brace designed to improve the performance of existing structures. This new design combines two pre-separated brace segments incorporated with two steel hook dampers (SHDs). The SHDs are specially designed with a curved, tapered shape that allows them to yield uniformly during tension or compression load, creating a consistent way to dissipate energy. To determine the performance of the design, cyclic loading tests were performed on both the SHDs component and the resilient brace members, using SHDs with different variations for the evaluations. The test results demonstrated that the SHDs had reliable and consistent load carrying capabilities, and the new brace designs showed substantial strength and ability to dissipate large amounts of energy. The test also revealed that the new design achieved a substantially high equivalent viscous damping, ranging from 35% to 42%. The improvements in the structure′s equivalent viscous damping, strength, and ability to dissipate energy confirm that the new design method is suitable for use in earthquake-resistant designs. Further study was conducted to see if a novel resilient brace design which includes pre-separated brace segments and SHDs could be used to improve a building′s seismic performance. The results showed a significant enhancement in structural strength with the braced frames achieving approximately 1.7 times the strength of the moment frame. Significant equivalent viscous damping achieved in a range of 21% to 23.6% at a 5% story drift. Furthermore, the energy dissipation capability of the braced frames was 0.87 to 1.53 times larger than that of moment frames. The improvement was continued tested on non-linear time-history analyses of multi-bay-multi-story structures which validate the effectiveness of the bracing system. For similar base shear demands the braced frames demonstrated superior performance by substantially lowering residual deformation. Specifically, maximum story drift was reduced by 25% to 48%, and residual drift was reduced by 19% to 47%, compared to the moment frame. This performance improvement observed clearly justified the use of the proposed device for upgrading building seismic performance.
