用伸臂連接核心筒和外框架是目前超高層建築較典型的結構方案。典型的伸臂使用鋼材，嵌入混凝土核心筒之中，施工複雜，工期較長，造價也高。有鑑於此，我們研發了混合伸臂系統，應用於中度地震區的高層建築。從核心筒角部伸出混凝土牆，通過鋼斜撐和剪切耗能件與巨柱相連。剪切耗能件採用軟鋼，能起到「結構保險絲」的作用，在發生大震時，「結構保險絲」達到屈服，保障了整個結構抗震力和穩定性。我們做了很多線性和非線性分析，包括按規範要求烈度和提高一級烈度的抗震分析，以測試方案的結構性能。這個創新混合伸臂系統也通過中國最嚴格試驗室中國建築科學研究院（CABR）三個不同的節點測試。這一混合伸臂系統已經獲得了國家級發明專利證書。系統已成功應用於重慶來福士廣場兩座350米高樓，總用鋼量減少10％，施工進度加快，由通常的2月節省到2.5周，也減輕了施工塔吊的要求，大幅度降低成本。混合伸臂系統將啟發更多相關研究，並可在中國其他高層建築項目中得到實施。

Hybrid Outrigger System with Structural Fuse for Tall Buildings Outriggers are essential but challenging aspect of high-rise buildings. Steel diagonal bracings are the most common type but they suffer from several shortcomings including relatively high material costs and the difficulties of connecting the steel outriggers to building cores.

Arup set out to develop a new outrigger system suitable for use in high-rise buildings in moderately seismic active regions. The resulting outrigger is a hybrid using concrete walls (adjacent to cores), steel bracings and structural fuses (suitable to dissipate seismic energy during an earthquake). This “fuse” component can dissipate the seismic energy in case of intense seismic shaking, to protect other components of the outrigger system, ensuring the safety of the whole tower. The team studied force patterns, deformations and failure mechanisms in each component, carried out finite element analyses and conducted experiment together with the China Academy of Building Research to ensure the reliability of our study and to refine the design.

The patented hybrid outrigger system was successfully applied in the design and construction of the two 350m high towers in the Raffles City Chongqing in China. Substantial cost savings were achieved through 10% reduction of total steel consumption and acceleration of the construction schedule. This innovative system was awarded an Honorable Distinction in China Innovation Award at the inaugural CITAB-CTBUH China Tall Building Awards 2016. It is anticipated that hybrid outrigger systems will continue to spark enthusiasm and be implemented on many other high-rise building projects in China and elsewhere.

「 結 構 保 險 絲 」 混 合 伸 臂 系 統

The patented hybrid outrigger system was successfully applied in the design and construction of the two 350m high towers in the Raffles City Chongqing in China.混合伸臂系統已成功應用於重慶來福士廣場兩座350米高樓。

The hybrid outrigger systems will continue to spark enthusiasm and be implemented on many other high-rise building projects in China and elsewhere.混合伸臂系統將啟發更多相關研究，並可在中國其他高層建築項目中得到實施。

The resulting outrigger is a hybrid using concrete walls, steel diagonals and structural fuses (suitable to dissipate seismic energy during an earthquake). This “fuse”component can dissipate the seismic energy in the case of intense seismic shaking, to protect other components of the outrigger system, ensuring the safety of the whole tower.混合伸臂系統包括混凝土牆、鋼斜撐和剪切耗能件與巨柱相連。在發生大震時，「結構保險絲」達到屈服，保障了整個結構抗震力和穩定性。

© Arup

© Arup

© Safdie Architects / CapitaLand (China) Investment Co Ltd

First Prize of Construction ProductivityArup

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