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（1 重慶大學(xué)土木工程學(xué)院， 重慶 400045; 2 中國地震局工程力學(xué)研究所， 哈爾濱 150080）
［摘要］裝配式先張預(yù)應(yīng)力混凝土框架是一種新型的結(jié)構(gòu)形式，該結(jié)構(gòu)采用先張預(yù)應(yīng)力混凝土梁與預(yù)制混凝土柱先鉸接后剛接的特殊施工方式，可有效降低框架梁端的負彎矩與配筋數(shù)量?；诶w維模型分別建立7度（0-1g，0-15g）和8度（0-2g）設(shè)防的現(xiàn)澆混凝土框架與裝配式先張預(yù)應(yīng)力混凝土框架的一系列彈塑性分析模型，提出了可考慮裝配式先張預(yù)應(yīng)力混凝土框架施工過程影響的建模方法。采用靜力彈塑性推覆分析和動力彈塑性時程分析對建議的新型結(jié)構(gòu)形式的抗震性能進行考察。結(jié)果表明，裝配式先張預(yù)應(yīng)力混凝土框架與現(xiàn)澆混凝土框架的整體抗震性能指標接近，在破壞模式與損傷細節(jié)上則存在不同程度的差異。裝配式先張預(yù)應(yīng)力混凝土框架的承載力比現(xiàn)澆混凝土框架高6%～12%，罕遇地震下裝配式先張預(yù)應(yīng)力混凝土框架最大層間轉(zhuǎn)角比現(xiàn)澆混凝土框架高1%～13%。
［關(guān)鍵詞］裝配式； 先張預(yù)應(yīng)力結(jié)構(gòu)； 混凝土框架； 彈塑性分析； 抗震性能
中圖分類號：TU378-4文獻標識碼：A文章編號：1002-848X(2018)12-0005-04
Preliminary study on prefabricated pretensioned prestressed reinforced concrete frame (Ⅱ):elastic-plastic seismic analysis
Liu Jiepeng1, Lin Xuchuan2, Wu Kailai2, Yang Junjie1, Wei Wei1, Wang Xuanding1
(1 School of Civil Engineering, Chongqing University, Chongqing 400045, China; 2 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China)
Abstract:Prefabricated pretensioned prestressed reinforced concrete (RC) frame is a new type of structure by using assembling construction technology to connect the prestressed RC beam and precast RC column with stiff joint after hinged joint. This construction method can effectively reduce the negative bending moment and longitudinal reinforcement ratio at the beam ends. A series of elastic-plastic structural analysis models based on the fiber model were constructed for prefabricated pretensioned prestressed RC frames and ordinary cast-in-situ RC frames, with the designed seismic fortification intensity ranging from 7 degree (acceleration of 0-1g and 0-15g) to 8 degree (acceleration of 0-2g). A modeling procedure was proposed considering the effect of the construction process of prefabricated pretensioned prestressed RC frame. Both the static elastic-plastic Pushover analysis and dynamic elastic-plastic time-history analysis were carried out to examine the seismic performance of the proposed new structure. Results show that the prefabricated pretensioned prestressed RC frames and ordinary cast-in-situ RC frames are close in terms of overall seismic performance, but there are differences in damage patterns and damage details. The load-carrying capacity of prefabricated pretensioned prestressed RC frames is 6%～12% higher than that of cast-in-place RC frames. The maximum story drift angle of prefabricated pretensioned prestressed RC frames under rare earthquakes is 1%～13% higher than that of cast-in-place concrete frames.
Keywords:prefabricated; pretensioned prestressed structure; RC frame; elastic-plastic analysis; seismic performance
*國家自然科學(xué)基金（51622802，51678542）。
作者簡介：劉界鵬，博士，教授，博士生導(dǎo)師，Email: liujp@cqu.edu.cn。
