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(1 上海大學(xué)土木工程系，上海 200072； 2 寧波市核力建筑設(shè)計(jì)有限公司，寧波 315040；3 浙江大學(xué)寧波理工學(xué)院，寧波 315040； 4 香港中文大學(xué)，香港)
［摘要］某商業(yè)中心地下汽車庫(kù)采用了寬扁梁和平板柱多層預(yù)應(yīng)力混凝土結(jié)構(gòu)，在可利用的地下建筑空間內(nèi)比普通混凝土結(jié)構(gòu)多建了1層車庫(kù)。其人防、消防等偶然荷載遠(yuǎn)大于正常使用荷載，使得預(yù)應(yīng)力混凝土構(gòu)件抗裂設(shè)計(jì)在這兩種荷載下很難同時(shí)滿足設(shè)計(jì)要求，以優(yōu)先滿足正常使用荷載，輔以普通鋼筋增強(qiáng)構(gòu)件的延性來(lái)滿足偶然荷載下的設(shè)計(jì)要求。采用塑膠管、直線形布筋方式減小預(yù)應(yīng)力摩擦損失。寬扁梁結(jié)構(gòu)的梁柱節(jié)點(diǎn)予以加強(qiáng)，以保證樓面荷載的順利傳遞。
［關(guān)鍵詞］預(yù)應(yīng)力混凝土；樓蓋；寬扁梁；預(yù)應(yīng)力摩擦損失
Design of prestressed reinforced concrete floor structure of underground parking
Wu Zhehua1,4, Chen Chunjian2，Yang Junlong3(1 Department of Civil Engineering, Shanghai University, Shanghai 200072, China;2 Ningbo Nucleus Electricity Architectural Design Institute, Ningbo 315040, China;3 Ningbo Institute of Technology, Zhejiang University, Ningbo 315040, China;4 The Chinese University of Hong Kong, Hong Kong, China)
Abstract:Focus on a tower building in central business district, the structural plan arrangement of its underground parking is optimized. The flat-beam and flat-plate structures are applied. Parking space of more than a floor is obtained. Because accident loads,such as defending load and fire protecting load,is more larger than normal live loads, it is difficult to satisfy the design requirement of the resist cracking in the prestressed concrete members simultaneously. It is suggested that the normal condition be priority and general steel be assisted to reinforced ductility of the members. Prestressed friction loss is controlled by embedding plastic pipes and using linear tendon shape in the super long structures. The joint of beam-column in the flat-beam structure is strengthened for load transferring.
Keywords:prestressed concrete；floor structure; flat-beam；friction loss
作者簡(jiǎn)介：鄔喆華，博士后，副教授，高工，副研究員，一級(jí)注冊(cè)結(jié)構(gòu)工程師，注冊(cè)監(jiān)理工程師，一級(jí)注冊(cè)建造師，二級(jí)注冊(cè)建筑師，計(jì)算機(jī)應(yīng)用軟件工程師，Email: wuzhehua@tom.com。
參考文獻(xiàn)
［1］鄔喆華, 樓文娟, 陳以一，等. 預(yù)應(yīng)力混凝土無(wú)梁樓蓋的經(jīng)濟(jì)技術(shù)分析［J］. 工業(yè)建筑, 2006(IS).
［2］GB50011—2001 建筑抗震設(shè)計(jì)規(guī)范［S］.北京:中國(guó)建筑工業(yè)出版社, 2001.
［3］GB50010—2002 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］.北京:中國(guó)建筑工業(yè)出版社, 2002.
［4］侯豐澤, 崔令霞, 李硯召，等. 抗動(dòng)載預(yù)應(yīng)力混凝土梁延性設(shè)計(jì)考慮［J］.世界地震工程，2007,23(3).
［5］郭靳時(shí), 尹新生. 鋼筋混凝土頂層扁梁邊節(jié)點(diǎn)受力性能試驗(yàn)研究［J］.工業(yè)建筑,2007,37(7).