- 摘 要
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(1 湖南大學(xué)土木工程學(xué)院, 長沙 410082; 2 廣西華藍(lán)設(shè)計集團有限公司, 南寧 530011)
[摘要]在已完成的16根無粘結(jié)預(yù)應(yīng)力混凝土梁低周反復(fù)荷載試驗的基礎(chǔ)上,對其中2根對稱布置無粘結(jié)預(yù)應(yīng)力筋混凝土梁進行了分析,建立了對稱布置無粘結(jié)預(yù)應(yīng)力筋混凝土梁的彎矩曲率恢復(fù)力模型?;诖嘶謴?fù)力模型,采用虛梁法編制程序計算了對稱布置無粘結(jié)預(yù)應(yīng)力筋混凝土梁的彎矩撓度滯回曲線,分析了日本學(xué)者MUGURUMA H所做的對稱布置無粘結(jié)預(yù)應(yīng)力筋混凝土梁的彎矩撓度滯回曲線,計算結(jié)果和試驗結(jié)果吻合良好。彎矩\|曲率恢復(fù)力模型的建立為對稱布置無粘結(jié)預(yù)應(yīng)力筋混凝土梁的抗震性能研究奠定了基礎(chǔ),具有理論和工程實際意義。
[關(guān)鍵詞]對稱布置無粘結(jié)預(yù)應(yīng)力筋混凝土梁; 低周反復(fù)荷載; 彎矩曲率恢復(fù)力模型; 彎矩撓度滯回曲線
中圖分類號:TU378.2 文獻標(biāo)識碼:A 文章編號:1002-848X(2015)04-0068-05
Research on restoring force model of unbonded prestressed concrete beams with symmetrical tendons
Tang Changhui1, Liu Dongming1, Li Yun2
(1 College of Civil Engineering, Hunan University, Changsha 410082, China;2 Guangxi Hualan Group Co., Ltd., Nanning 530011, China)
Abstract:Based on completed tests of sixteen unbonded prestressed concrete beams under low cyclic reversed loading, two unbonded prestressed concrete beams with symmetrical tendons were analyzed. The momentcurvature restoring force model of unbonded prestressed concrete beams with symmetrical tendons was presented on the base of the experiment. According to the model, a program was developed with virtual beam method. Using the program, momentdeflection hysteretic loops of the two tested beams and unbonded prestressed concrete beams with symmetrical tendons tested by Hiroshi MUGURUMA H were calculated analyzed. The calculation results agree reasonably with experiment result.The momentcurvature
restoring force model can provide theoretical basis for researching the seismic performance of unbonded prestressed concrete beams with symmetrical tendons and has theory and actual project significance.
Keywords:unbonded prestressed concrete beam with symmetrical tendon; low cyclic loading; momentcurvature restoring force model; momentdeflection hysteretic loop
*國家自然科學(xué)基金項目(51278179)。
作者簡介:唐昌輝,博士,副教授,Email:tchui2010@126.com。
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