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孟少平 吳 京 呂志濤
（東南大學 南京 210096）[提要] 本文提出利用等效荷載法計算主彎矩，進而計算次彎矩的方法。計算了預應力井式梁和雙向板的次彎矩，并對其特征進行分析。算例表明，井式梁和雙向板的次彎矩在支座間不呈直線分布，而是由于相鄰構件的約束呈空間立體形狀。次彎矩在方向和數(shù)值上也有其獨特的特征。
[關鍵詞] 預應力 井式梁 雙向板 次彎矩This article puts forward the equivalent loading method in calcuating the primary moment in prestressed concrete structures, whose results can be used in further calculation of secondary monent. By this method, a cross-beam system and two -way slab have been calculated, and their charac.teristics have been analyzed. The example demonstrates that the secondary moments of cross-beam systems and two -way slabs do not have a linear distribution between the suppprts, however, because of the restraints between nearby elements, they have a special shape. The direction and magnitude of the secondary moments also have their special characteristics.
Keywords: presressed concrete; secondary moment; cross-beam; two -way slab
