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馮  遠(yuǎn)  王立維  李立達(dá)?。ㄖ袊?guó)建筑西南設(shè)計(jì)研究院  成都　610081）

[提要]  重慶市游泳、跳水館屋蓋設(shè)計(jì)采用四角錐焊接空心球節(jié)點(diǎn)鋼管網(wǎng)殼。平面形狀為梭形，長(zhǎng)軸208m，短軸82m，屋蓋為平面兩條圓弧線，脊為一條圓弧線，沿脊的方向形成無(wú)數(shù)個(gè)圓組成的空間曲面，兩端懸臂段的懸挑長(zhǎng)度分別為32.75，28.80m。主要介紹了該工程屋蓋的結(jié)構(gòu)選型、支座彈性剛度的確定，不同支座彈性剛度值對(duì)網(wǎng)殼內(nèi)力的影響以及設(shè)計(jì)中重點(diǎn)考慮的一些問(wèn)題。
[關(guān)鍵詞]  鋼結(jié)構(gòu)  網(wǎng)殼  大懸挑  支座  彈性剛度

The roof of the natatorium of Chongqing adopts quadrangular pyramid with welding hollow sphere joints. It's shuttle shape with 208 m long major axis and 82 m long minor axis. The roof is formed with two arcs. An arc moves along the ridge and forms the curve face. The two cantilever are 32.75m and 28.80m long. This paper mainly introduces the choice of the structural system,  the confirmation of base elastic stiffness, the affection of various base elastic stiffness on the inner force of the latticed shell and some important problems.
Keywords:  steel stpucture; latticed shell; long span cantilever; base; elastic stiffness