- 摘 要
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(1 北京工業(yè)大學(xué)工程抗震與結(jié)構(gòu)診治北京市重點(diǎn)實(shí)驗(yàn)室, 北京 100124;
2 中國(guó)鐵建十二局
集團(tuán)有限公司, 太原 030024; 3 北京市市政工程設(shè)計(jì)研究總院有限公司, 北京 100082)
[摘要]以某在建地鐵二層車站鋼管混凝土Y形柱及混凝土平臺(tái)結(jié)構(gòu)為原型設(shè)計(jì)試驗(yàn)試件,進(jìn)行靜力低周反復(fù)加載試驗(yàn)。觀測(cè)混凝土結(jié)構(gòu)開裂及裂縫變化過程、鋼管表面應(yīng)變變化情況,分析結(jié)構(gòu)受力狀態(tài),統(tǒng)計(jì)分析荷載側(cè)移滯回曲線、骨架曲線、等效剛度退化、等效黏滯阻尼比等特性,研究結(jié)構(gòu)的抗震性能。試驗(yàn)結(jié)果表明:所設(shè)計(jì)的結(jié)構(gòu)Y形鑄件、鋼管混凝土柱身、連接構(gòu)造、預(yù)埋件等受力可靠,混凝土結(jié)構(gòu)與鋼管混凝土Y形柱協(xié)同工作性能良好;在結(jié)構(gòu)側(cè)移逐漸增大過程中出現(xiàn)了內(nèi)力重分布現(xiàn)象、結(jié)構(gòu)內(nèi)部耗能機(jī)理的變化過程及階段性耗能規(guī)律。
[關(guān)鍵詞]鋼管混凝土; Y形柱; 擬靜力試驗(yàn); 抗震性能; 地鐵車站
中圖分類號(hào):TU352.1 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1002-848X(2015)03-0031-08
Experimental study on seismic behavior of Yshaped concretefilled steel
tubular column and reinforced concrete platform structure
Zhou Longzhuang1, Gao Xiangyu1, Chen Juan1, Wang Dongsheng2,
Li Guangyao2,
Chen He3 , Xue Rujing3
(1 The Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education, Beijing University of
Technology, Beijing 100124, China; 2 China Railway Twelve Bureau Group Co., Ltd., Taiyuan 030024, China;
3 Beijing General Municipal Engineering Design & Research Institute Co., Ltd.,
Beijing 100082, China)
Abstract:Pseudostatic tests were carried out for Yshaped concretefilled steel tubular column (CSTC) and reinforced concrete platform structure, which were used for underground space structure of a twostory subway station in construction. The crack and crack change process of the concrete structure were observed as well as the strain change of the steel tube surface. The mechanical state of the structure was analyzed, and loadlateral displacement hysteretic curve was statistically analyzed as well as characteristics of skeleton curve, equivalent stiffness degradation and equivalent viscous damping ratio to study the seismic behavior of the structure. Test results show that the casting of the Yshaped structure, concretefilled steel tube, connection details and embedded components are safe and reliable. The collaborative work performance of concrete structure and CSTC is well. The internal force redistribution phenomenon appears in the process of the gradual increase of lateral displacements. The change process of the internal energy dissipation mechanism and staged energy dissipation principle of the structure appeared with increasing structural lateral displacement.
Keywords:concretefilled steel tube; Yshaped column; pseudostatic test; seismic behavior; subway station
*北京工業(yè)大學(xué)城市與工程安全減災(zāi)省部共建教育部重點(diǎn)實(shí)驗(yàn)室與工程抗震與結(jié)構(gòu)診治北京市重點(diǎn)實(shí)驗(yàn)室資助項(xiàng)目(2013AG538869)。
作者簡(jiǎn)介:周龍壯,碩士,Email:longzhuang0629@126.com。
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