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（1 重慶大學土木工程學院  400045； 2 重慶工商職業(yè)學院工程技術(shù)系  400051）
【提要】  利用預應力次梁等效荷載對邊主梁的有利影響，降低非預應力邊主梁扭矩，并對多段預應力布筋形式產(chǎn)生的多段等效荷載進行了改進，利用實用等效荷載方法把多段均布荷載轉(zhuǎn)化為滿跨均布荷載，從而方便了樓蓋結(jié)構(gòu)的設(shè)計。
【關(guān)鍵詞】  等效荷載  邊主梁  扭矩  不等跨
Large Span Structural Boundary Girder Torsion Simplified Calculation/Jiang Feng 1，2，Li Tangning1（1 School of Civil Engineering，Chongqing Univ.，Chongqing 400045，China；2 Department of Eng. & Tech.，Chongqing Technology and Business Institute，Chongqing 400051，China）
Abstract:Favorable influence of equivalent load distributed prestressed secondary beam is utilized to reduce the torsional moment of boundary girder，and the form of the multisegment uniform distributed load produced by multisegment prestressed reinforcing bar is improved.It utilizes practical equivalent load method to turn multisegment uniform distributed load into fullspan uniform distributed load.The method facilitates the design of floor structure.
Keywords:equivalent load；boundary girder；moment of torsion；unequal span