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(北京市建筑設(shè)計(jì)研究院，100045)

［提要］國(guó)家?jiàn)W體匹克體育中心體育場(chǎng)為一改擴(kuò)建項(xiàng)目，始建于1989年，原為1990年亞運(yùn)會(huì)主體育場(chǎng)，現(xiàn)為了滿足2008年北京第29屆奧運(yùn)會(huì)現(xiàn)代五項(xiàng)比賽的各項(xiàng)要求而進(jìn)行改擴(kuò)建，改建后體育場(chǎng)的建筑面積和建筑高度均發(fā)生了很大變化。原結(jié)構(gòu)體系采用鋼筋混凝土框架，加固結(jié)構(gòu)體系研究中，結(jié)合各種改造加固手段的可行性及經(jīng)濟(jì)性，采用PMSAP，SAP2000，ANSYS三種軟件對(duì)比分析了鋼筋混凝土框架及框架-剪力墻、鋼筋混凝土框架-鋼支撐及框架-耗能鋼支撐四種結(jié)構(gòu)體系，最終確定了鋼筋混凝土框架-耗能鋼支撐的結(jié)構(gòu)體系。通過(guò)利用耗能器的減震作用，有效降低了結(jié)構(gòu)的加固難度和加固量，增強(qiáng)了結(jié)構(gòu)的整體抗側(cè)剛度，這是一種經(jīng)濟(jì)、有效的新型加固方法。屋面采用型鋼 拉索鋼罩篷，預(yù)應(yīng)力索的使用有效控制了屋面豎向變形，使外挑型鋼梁強(qiáng)度可以充分發(fā)揮，達(dá)到強(qiáng)度和剛度雙控的優(yōu)化設(shè)計(jì)。

［關(guān)鍵詞］體育場(chǎng)改造加固；減震耗能結(jié)構(gòu)；鋼結(jié)構(gòu)；型鋼；拉索鋼罩篷

Rebuild and Extended Structural Design of the National Olympic Center Stadium/Qin Yang，Liu Lijie，Gao Pengfei，Geng Jin，Zong Hai(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract: In order to meet the modern pentathlon demand of the 2008 29th Olympic Games held in Beijing, the National Olympic Center Stadium built in 1989  needs rebuild and RC extended construction. Both of the construction area and height are enlarged greatly for the stadium. Considering the feasibility and economy, four structure styles were studied during the course of design, they are reinforced concrete frame structure, frame-shear wall structure, concrete frame with steel braced structure and frame with damping and energy dissipission steel braced structure. Finally concrete frame with damping and enerty dissipission steel braced structure was adopted. With the use of damping absober, both the difficulty and quantity of the strengthening were decreased, and the lateral stiffness of the structure was strengthened. Cabled steel frame structure was used in the roof, the vertical distortion was effectively controlled and the strength of the spread out steel beam was used fully by the use of prestressed cable, the best design was achieved by the control of strength and stiffness.The analysis softwares PMSAP, SAP2000 and ANSYS were used during the design.

Keywords: stadium rebuild and strengthen; damping and energy dissipation structure;

steel structure; steel frame-cabled shed