- 摘 要
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（1 同濟(jì)大學(xué)預(yù)應(yīng)力研究所， 上海 200092; 2 同濟(jì)大學(xué)先進(jìn)土木工程材料教育部重點實驗室，上海 200092）
［摘要］為了探討預(yù)應(yīng)力混凝土框架的梁端塑性轉(zhuǎn)動特點和內(nèi)力重分布規(guī)律，對3榀8m跨度的預(yù)應(yīng)力混凝土框架進(jìn)行了豎向靜載試驗及有限元非線性模擬分析。結(jié)果表明，適筋破壞的預(yù)應(yīng)力混凝土框架，可產(chǎn)生充分的內(nèi)力重分布現(xiàn)象，影響框架內(nèi)力重分布的因素主要包括相對受壓區(qū)高度、預(yù)應(yīng)力度及次彎矩等；最后給出了以相對受壓區(qū)高度及預(yù)應(yīng)力度為自變量的框架梁梁端彎矩調(diào)幅的建議公式，并與規(guī)范公式進(jìn)行了對比。
［關(guān)鍵詞］預(yù)應(yīng)力混凝土框架； 內(nèi)力重分布； 彎矩調(diào)幅
中圖分類號：TU398-9, TU378文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)08-029-05
Experimental study on internal force redistribution of prestressed concrete frame
Xiong Xueyu1,2, Yu Pengcheng1, Wang Yiqingzi1
(1 Institute of Prestressed Structures, Tongji University, Shanghai 200092, China; 2 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 200092, China)
Abstract:In order to study the plastic rotation and internal force redistribution of the end of the prestressed frame beam, a vertical static load experiment of three 8m-span prestressed concrete frame was performed, and the non-linear analysis was also performed using finite element software. The results show that appropriate reinforced prestressed concrete frames can produce sufficient internal force redistribution. The main relating factors influencing internal force redistribution of the frame include the relative height of the compression zone, the prestressing degree and the secondary moment. Finally, a suggested calculation formula of the moment modification of frame beam end was presented with the relative height of the compression zone and the prestressing degree as coefficients. The formula was compared with that in code.
Keywords:prestressed concrete frame; internal force redistribution; moment modification
*國家自然科學(xué)基金資助項目（51178328,5578400）。
作者簡介：熊學(xué)玉，博士，教授，博士生導(dǎo)師,Email：xueyu@#edu.cn。
