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(1 北京市建筑工程研究院，北京  100039； 2 桂林工學(xué)院，桂林 541004)

［摘要］通過(guò)工程實(shí)例，說(shuō)明井字梁的預(yù)應(yīng)力配筋計(jì)算，不能僅依靠?jī)?nèi)力計(jì)算得到的內(nèi)力包絡(luò)圖直接進(jìn)行預(yù)應(yīng)力配筋，還要考慮預(yù)應(yīng)力平衡荷載在結(jié)構(gòu)中的二次分配，預(yù)應(yīng)力筋在井字梁中的布置要綜合考慮構(gòu)件彎矩的大小和荷載類(lèi)型，在井字梁的各肋梁中預(yù)應(yīng)力配筋數(shù)量要盡量均勻。

［關(guān)鍵詞］井字梁；預(yù)應(yīng)力；平衡荷載

Discussion on design of pre-stressed cross beam

Tong Weimin¹, Du Yankai²(1 Beijing Building Construction Research Institute, Beijing 100039,China; 2 Guilin Institute of Technology, Guilin 541004, China)

Abstract:

Based on a pre-stressed concrete cross beam structure，explain that the calculation of tendons in each beam not only depends on the bending moment envelope curve but also the twice moment distribution of balanced load is explained. The moment and load types should be considered when disposing the prestressed tendons. The number of the pre-stressed tendons should be uniform distributed in every beam.

Keywords:cross beam；prestressing；balanced load

作者簡(jiǎn)介：仝為民，教授級(jí)高工，一級(jí)注冊(cè)建造師，Email:tongweimintwm@sina.com。

參考文獻(xiàn)

［1］陶學(xué)康. 無(wú)粘結(jié)預(yù)應(yīng)力混凝土設(shè)計(jì)與施工［M］. 北京：地震出版社，1993