本文選題：聚乙烯工程纖維增強水泥基復(fù)合材料 + 對角斜筋�。� 參考：《西安建筑科技大學(xué)》2013年碩士論文

【摘要】：對于剪彎比較大的普通配筋小跨高比連梁，一般表現(xiàn)出較差的延性性能和耗能能力，不能達(dá)到結(jié)構(gòu)對其承載力、延性及耗能能力的要求。聚乙烯醇工程纖維增強水泥基復(fù)合材料（Polyvinyl Alcohol-Engineering Fiber Reinforced CementitiousComposites，簡稱PVA-FRC）是一種高韌性材料，具有較大的能量吸收能力和裂縫控制能力，可提高連梁承載力、延性和耗能能力。為了獲得一種能夠較好滿足高層建筑結(jié)構(gòu)需求，同時施工方便且又經(jīng)濟(jì)的連梁方案，本文將PVA-FRC和加設(shè)對角斜筋配筋方案同時應(yīng)用于小跨高比連梁，完成了4個PVA-FRC對角斜筋小跨高比連梁試件與1個普通混凝土對角斜筋小跨高比連梁對比試件的擬靜力試驗，研究了PVA-FRC基體和對角斜筋共同作用對連梁裂縫及破壞形態(tài)的影響，分析其破壞過程、破壞形態(tài)、承載能力、變形能力和耗能能力等。 之后，在對PVA-FRC對角斜筋小跨高比連梁受力機理分析的基礎(chǔ)上，提出用于模擬跨高比小于等于1.5的PVA-FRC對角斜筋小跨高比連梁受剪承載力的軟化拉-壓桿模型，建立各拉桿、壓桿的變形協(xié)調(diào)方程、物理方程和平衡方程等，，推導(dǎo)了PVA-FRC對角斜筋小跨高比連梁受剪承載力的軟化拉-壓桿模型計算公式，并給出詳細(xì)的計算步驟。
[Abstract]:For the common beams with large shear and bending ratio, the ductility and energy dissipation capacity of the beams with small span and height ratio are poor, which can not meet the requirements of the bearing capacity, ductility and energy dissipation capacity of the structure. Polyvinyl Alcohol-Engineering Fiber Reinforced CementitiousComposites, (PVA-FRC) is a kind of high toughness material, which has high energy absorption ability and crack control ability. It can improve the bearing capacity, ductility and energy dissipation ability of connecting beams. In order to obtain a kind of connecting beam scheme which can better meet the needs of tall building structure and is convenient and economical to construct at the same time, this paper applies PVA-FRC and diagonal reinforcement scheme to the small span / height ratio connecting beam at the same time. Quasi static tests of four specimens of PVA-FRC diagonal bead with small span / height ratio connecting beam and one ordinary concrete specimen with diagonal bead are completed. The effects of PVA-FRC matrix and diagonal bead on the crack and failure mode of the connecting beam are studied. The failure process, failure form, bearing capacity, deformation capacity and energy dissipation capacity are analyzed. Then, based on the analysis of the stress mechanism of PVA-FRC diagonal bead beam with small span to height ratio, a softening tension-compression bar model is proposed to simulate the shear bearing capacity of PVA-FRC diagonal beam-height ratio connecting beam with a span height ratio of less than 1.5. The deformation compatibility equation, physical equation and equilibrium equation of the compression bar are derived, and the calculation formulas of the softening tension-compression bar model for the shear bearing capacity of the small span / height ratio connecting beam with diagonal tendons are derived, and the calculation steps are given in detail.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU973

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