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[提要]  根據(jù)10榀無(wú)粘結(jié)部分預(yù)應(yīng)力混凝土框架結(jié)構(gòu)在豎向或水平低周反復(fù)荷載作用下的試驗(yàn)結(jié)果，提出了等效節(jié)點(diǎn)剛域概念和等效塑性鉸長(zhǎng)度計(jì)算的建議公式，并運(yùn)用結(jié)構(gòu)塑性極限分析原理推導(dǎo)了不同破壞機(jī)構(gòu)相應(yīng)的框架結(jié)構(gòu)極限荷載計(jì)算公式，計(jì)算結(jié)果與試驗(yàn)結(jié)果吻合較好。
[關(guān)鍵詞]  無(wú)粘結(jié)部分預(yù)應(yīng)力混凝土 框架 塑性分析

Based on the test results of ten unbonded prestressed concrete frames subjected to vertical or horizontal cyclic loading, a concept of equivalent rigid joint region is put forward and an empirical formula is proposed to calculate the length of the equivalent plastic hinge. Then expressions are derived by the way of plastic analysis for ultimate loads of the structures corresponding to different collapse mechanisms.
Keywords: unbonded partially prestressed concrete; frame; plastic analysis