【摘要】：某下承式鋼管拱肋鋼箱梁系桿拱橋主橋?yàn)椴坏瓤缛B拱橋,跨徑布置為(60+136+208+136+60)m。結(jié)構(gòu)體系為墩梁分離、拱梁固結(jié),拱肋由外傾式鋼管主拱和空間曲線的鋼管副拱組成。邊跨60m主梁采用混凝土箱梁,拱跨主梁為鋼箱梁。下部結(jié)構(gòu)采用Y形混凝土橋墩。鋼管拱肋與鋼箱梁連接處采用了一種新型的連接構(gòu)造形式,在鋼箱梁頂面對應(yīng)縱腹板及橫隔板的位置熔透焊一個矩形結(jié)構(gòu),將鋼管拱肋伸入到矩形結(jié)構(gòu)中,拱肋與鋼箱梁通過矩形結(jié)構(gòu)連接成整體,內(nèi)力通過矩形結(jié)構(gòu)順利傳遞。利用有限元程序ANSYS建立拱梁接合部局部模型進(jìn)行分析,結(jié)果表明,整體受力性能良好、傳力可靠,是一種合理的構(gòu)造設(shè)計。
[Abstract]:The main bridge of a through steel box girder arch bridge with steel arch rib is three continuous arch bridge with unequal span, and the span arrangement is (60 136 208 136 60) m. The structure system is composed of pier-beam separation, arch beam consolidation, arch rib is composed of extroverted steel pipe main arch and space curve steel pipe auxiliary arch. The side span 60 m main girder adopts concrete box girder, and the arch span main girder is steel box girder. The lower structure adopts Y-shaped concrete pier. A new type of connection structure is adopted in the connection between steel pipe arch rib and steel box girder. The steel tube arch rib is inserted into the rectangular structure by melting through a rectangular structure at the position corresponding to the longitudinal web and transverse diaphragm on the top surface of the steel box girder. Arch rib and steel box girder are connected as a whole through rectangular structure, and internal force is transferred smoothly through rectangular structure. The finite element program ANSYS is used to establish the local model of the arch beam joint. The results show that the overall stress performance is good, the force transfer is reliable, and it is a reasonable structural design.
【作者單位】： 中鐵大橋勘測設(shè)計院集團(tuán)有限公司;
【分類號】：U448.225

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