【摘要】：坦桑尼亞基甘博尼大橋主橋?yàn)殡p塔單索面預(yù)應(yīng)力混凝土斜拉橋,跨徑布置為(40+60+200+60+40)m,主梁采用預(yù)應(yīng)力混凝土單箱三室閉合截面,橋塔為單柱式空心八邊形截面,塔高55m,橋塔墩為矩形空心薄壁墩,塔梁固結(jié)、塔墩分離。該橋斜拉索采用80~160股平行鋼絞線,設(shè)計(jì)最大拉力13 910kN;主梁斜拉索錨固處設(shè)置施加預(yù)應(yīng)力的橫向肋板;索塔錨固區(qū)采用雙J形環(huán)向預(yù)應(yīng)力;邊墩及輔助墩支座采用獨(dú)特的大噸位拉壓支座;邊墩及輔助墩承臺(tái)采用空心框架結(jié)構(gòu)。采用橋梁結(jié)構(gòu)設(shè)計(jì)系統(tǒng)SCDS2011進(jìn)行結(jié)構(gòu)計(jì)算分析,結(jié)果表明結(jié)構(gòu)受力性能均滿足規(guī)范要求。
[Abstract]:The main bridge of Kigamboni Bridge in Tanzania is a double-tower single-cable plane prestressed concrete cable-stayed bridge with span arrangement of (40 60 200 60 40) m. The main beam is composed of prestressed concrete single box and three rooms closed section, and the tower is a single column hollow octagonal section. Tower height 55 m, bridge tower pier is rectangular hollow thin-walled pier, tower beam consolidation, tower pier separation. The cable-stayed cable of the bridge is 80,160 parallel strands, the maximum tensile force is 13 910kN, the main girder cable Anchorage is provided with prestressed transverse ribbed slab, the cable tower Anchorage zone adopts double J shape circumferential prestressing force, and the cable tower anchoring area adopts double J ring prestressing force. The side pier and auxiliary pier support adopt the special large tonnage pull-compression support, and the side pier and auxiliary pier cap adopt hollow frame structure. The bridge structure design system SCDS 2011 is used to calculate and analyze the structure. The results show that the mechanical performance of the structure meets the requirements of the code.
【作者單位】： 中鐵大橋局集團(tuán)有限公司設(shè)計(jì)分公司;
【分類號(hào)】：U448.27

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