- 摘 要
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汪大綏， 周 健， 王 建， 江曉峰， 蘇 駿， 陳紅宇， 施志深， 王瑞峰
(現(xiàn)代設(shè)計(jì)集團(tuán)華東建筑設(shè)計(jì)研究院有限公司，上海200002)[摘要] 連體結(jié)構(gòu)是一類復(fù)雜的建筑結(jié)構(gòu)形式，連廊連接方式不利時(shí)可能嚴(yán)重影響主體結(jié)構(gòu)的抗震性能，必需應(yīng)用合理的技術(shù)方案和分析手段以保證結(jié)構(gòu)的抗震可靠性。作為上海市的重點(diǎn)建設(shè)項(xiàng)目，虹橋綜合交通樞紐工程的東交通中心和西航站樓存在體型復(fù)雜和豎向剛度不規(guī)則等多項(xiàng)單體超限內(nèi)容，而高空連廊搭接方案進(jìn)一步加大了結(jié)構(gòu)設(shè)計(jì)難度，經(jīng)多次技術(shù)論證，確定采用弱連接方案。為驗(yàn)證該方案的可靠性，提出了一種基于LS-DYNA程序和自編子程序的彈塑性時(shí)程分析方法，其可靠性得到了試驗(yàn)數(shù)據(jù)的有力支持，而以“角點(diǎn)應(yīng)變法”為基礎(chǔ)的塑性鉸簡化評價(jià)方法也為結(jié)構(gòu)抗震性能評估提供了一種新的尺度。計(jì)算結(jié)果表明，弱連接設(shè)計(jì)條件下的主體結(jié)構(gòu)具有良好的抗震性能，連廊在一定程度上有助于減緩主體結(jié)構(gòu)的動(dòng)力需求。
[關(guān)鍵詞] 虹橋交通樞紐；弱連體結(jié)構(gòu)；減震設(shè)計(jì)；彈塑性時(shí)程分析；纖維積分法；角點(diǎn)應(yīng)變法Seismic Design and Dynamic Analysis of Hongqiao Integrated Transport Hub with a Weakly Connected Structure
Wang Dasui, Zhou Jian, Wang Jian, Jiang Xiaofeng, Su Jun, Chen Hongyu, Shi Zhisheng, Wang Ruifeng
( East China Architectural design and Research Institute Co. Ltd, Xian Dai Architectural Design Group, Shanghai 200002, China)Abstract: Connected structure is one kind of building systems with mostly comprehensive behaviors, where unreasonable corridor design could be adverse to the seismic performance of main structure, thus, good technologies and tools in the phase of design and analysis should be adopted for ensuring the structural reliability. As one of key construction projects in Shanghai, the East Transport Central and West Terminal Building of Hongqiao Integrated Transport Hub had several overrunning items, such as complex shape in plane and irregularity of vertical stiffness, furthermore, the high construction for corridor increased the difficulty of structural design. According to many technical demonstrations, the weak connection principle was approved and its feasibility was proofed by a new history analysis method. This method was based on LS-DYNA program and user subroutine with good supports by experimental results, and one comer-point strain method for accessing roughly plastic hinge was also put forward. The results show that the main structures are of good seismic performance and their dynamic demands could be reduced by the corridor with a weak connection.
Keywords: Hongqiao Integrated Transport Hub; weakly connected structure; earthquake-reduction design; elastoplastic time history analysis; fiber integration method; comer-point strain method
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