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（1 清華大學(xué)土木工程安全與耐久重點(diǎn)實(shí)驗(yàn)室， 北京 100084； 2 清華大學(xué)北京市鋼與混凝土組合結(jié)構(gòu)工程技術(shù)研究中心， 北京 100084； 3 清華大學(xué)土木工程系， 北京 100084）

［摘要］結(jié)合某地下車庫(kù)頂蓋結(jié)構(gòu)工程設(shè)計(jì)實(shí)例，詳細(xì)介紹了重載、大跨條件下地下車庫(kù)頂蓋結(jié)構(gòu)采用組合梁板結(jié)構(gòu)的優(yōu)越性，介紹了設(shè)計(jì)流程及其重點(diǎn)與難點(diǎn)，提出了相關(guān)構(gòu)造措施，并進(jìn)一步進(jìn)行了經(jīng)濟(jì)性分析。實(shí)踐表明，地下車庫(kù)頂蓋采用組合梁板結(jié)構(gòu)可以有效實(shí)現(xiàn)地下車庫(kù)大跨和控制層高、降低自重、合理控制造價(jià)的目的，且采用疊合板組合梁可預(yù)制裝配、快速施工；地下結(jié)構(gòu)大跨頂蓋舒適度設(shè)計(jì)時(shí)采用峰值加速度指標(biāo)控制更加合理；采用合理的截面設(shè)計(jì)與合適的構(gòu)造措施可以降低材料用量，簡(jiǎn)化施工流程；相比于混凝土梁板結(jié)構(gòu)頂蓋或空心板結(jié)構(gòu)頂蓋，組合梁板結(jié)構(gòu)頂蓋雖增加了用鋼量，但減少了土方開(kāi)挖和運(yùn)輸量，且減少了鋼筋、模板、支架用量，綜合造價(jià)更低；采用大柱網(wǎng)方案的地下車庫(kù)在相同占地面積下提供了更多停車位，綜合效益顯著。

［關(guān)鍵詞］大跨地下車庫(kù)； 鋼-混凝土組合頂蓋結(jié)構(gòu)； 設(shè)計(jì)方法; 構(gòu)造措施； 施工流程

中圖分類號(hào)：TU398-9文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)19-0001-06

Application of composite beam-slab structure in the roof system of underground garage

 Guo Yutao1,  Nie Jianguo2,  Zhou Meng3

(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China;  2 Beijing Engineering Research Center of Steel and Concrete Composite Structures, Tsinghua University, Beijing 100084, China; 3 Department of Civil Engineering, Tsinghua University, Beijing 100084, China)

Abstract:Based on an actual design case of a heavy-load and long-span underground garage roof structure, the composite structures consisting of steel beams and concrete slabs were used and the design procedures were introduced, which were proved to have many superiorities. The relevant structural measures  were presented and further cost computation and economic analysis were conducted. Through design practice, several conclusions can be drawn as follows: the application of composite beam-slab structure for the roof system of underground garage can effectively realize the purpose of long-span design and decrease the structural height and self-weight, meanwhile facilitate the construction process by partially prefabricating, which brings considerable economic benefits; it is more reasonable to adopt the peak acceleration index  in the serviceability design of roof system of underground garage; appropriate section design and construction measure can effectively reduce material usage and simplify construction process; compared with the concrete beam-slab roof system or hollow roof system, the composite beam-slab roof system  increases the amount of steel consumption but decreases the amount of soil excavation and the amount of rebar, templates and supports, which results in lower cost; lager size of column grid offers more parking lots within the same architectural space, which brings significant economic benefits.

Keywords:long-span underground garage; steel-concrete composite roof structure; design method; construction measure; construction process

*國(guó)家自然科學(xué)基金資助(51138007)，北京市自然科學(xué)基金資助(8162023)。

作者簡(jiǎn)介：郭宇韜，博士研究生， Email: gyt11@mails.tsinghua.edu.cn。