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潘 立 (中國建筑科學(xué)研究院建筑結(jié)構(gòu)研究所，北京100013)
[摘要] 依據(jù)《混凝土結(jié)構(gòu)設(shè)計規(guī)范》(GB50010 -2002)、《建筑抗震設(shè)計規(guī)范》(GB50011 -2001)和《預(yù)應(yīng)力混凝土結(jié)構(gòu)抗震設(shè)計規(guī)程》(JGJ140 -2004)的相關(guān)規(guī)定，對后張預(yù)應(yīng)力混凝土框架梁剛接端截面受壓區(qū)非預(yù)應(yīng)力筋的最小與最大配筋率、受拉區(qū)預(yù)應(yīng)力筋的構(gòu)造最小配筋率進行了研究，推導(dǎo)了這些配筋限值的合理表達(dá)式，可供預(yù)應(yīng)力混凝土結(jié)構(gòu)設(shè)計與軟件編程人員參考。
[關(guān)鍵詞] 后張預(yù)應(yīng)力；框架梁；截面受壓（拉）區(qū)；配筋限值；配筋率Research on limit amounts of reinforcement and prestressed tendon on the rigid support section of post-tensioned concrete frame beams
Pan li
(Institute of Building Structures, China Academy of Building Research, Beijing 100013, China)Abstract: Based on Code for Design Concrete Structures(GB50010 -2002),Code for Seismic Design of Buildings(GB50011 -
2001), and Specfication for Seismic Design Prestressed Concrete Structures(JGJ140 -2004), the minimum and the maximum ratio of reinforcement in pressed region, and the constructive minimum ratio of prestressed tendon in tensioned region on the rigid support section of post-tensioned concrete frame beams are researched, reasonable formulas of determining these limit values are deduced in detail, which can be used by the designer and the programmer for desigp of prestressed concrete structures.
Keywords: post-tensioned; concrete frame beams; pressed/tensioned region; limit amount of reinforcement; ratio of reinforcement
