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        聶建國¹   王寒冰¹   任明星²    陳 林^l

    （1 清華大學(xué)土木工程系 北京 100084； 2 北京市市政工程管理處 100013）

[提要]  鋼-混凝土組合梁以其承載力高、剛度大等優(yōu)點(diǎn)，在我國城市的立體交通建設(shè)中應(yīng)用前景廣闊。結(jié)合實(shí)際工程，介紹了鋼  混凝土疊合板組合梁在橋梁改造加固中的應(yīng)用。實(shí)踐證明，鋼-混凝土疊合板組合梁可以大幅度提高結(jié)構(gòu)承載力，降低結(jié)構(gòu)白重，減小撓度等，另外還可以節(jié)省支模，縮短施工周期。
[關(guān)鍵詞]  橋梁  改造加固  疊合板  組合梁  工程應(yīng)用

This paper introduces the application of composite steel-precast slab and concrete beams in the rehabilitation and strengthening of Weigou bridge in the suburb of Beijing. The practice has showed that using composite beams of steel and precast slab combined with concrete cast in-situ can increase the structure's load bearing capacity extensively, reduce the self-weight and deflection, simplify the construction procedure and shorten the construction period. Notable benefits of technology and economics, etc. are achieved from the engineering practice.
Keywords:  rehabilitation;  bridge;  composite beam; steel-precast slab; concrete cast in-situ;  engineering practice