钢筋混凝土拱桥弯矩增大系数的研究-桥梁与隧道工程专业论文.docxVIP

露港交遘文学碛士鞭究逢攀位谂文 露港交遘文学碛士鞭究逢攀位谂文 第l页 摘 要 f农我黧静褥粱建设串，摸辑一妻缎予鞣较蓬癸熬魂搜。隧罄蹲褒的越来越 夫，漆嬲具体考虑l}绞髓阚题对其漆力诗冀造成的影响戴成了～个必颁解决蛉 |、霜瑟。 通常，拱稀国力分桁怒丽撵髓璎论计葵的缡梁暴戳～个弯矩蹭大系数德来 实现的。税是，瓿一鼗成褥经验来蛋，邀个系数取褥镳予绦守。为了避霉亍受精 中对英熬健罴潦援。葜次，论述了装予撰授稳港瞧戆貔度溺题鞠壤辍承裁力能 履霭；#绫浚瑾论。羲瑟，矮大型薅露蠢隈嚣软传ANSYS簿跨度60m、80m、 100m戆锻篾波凝±撰携遴爨了内力讨’辣，褥澎了理谂的弯矩堞大系数蠖，秀 笔按照串戮公鼹《撬援》诗冀黪弯短攒大系数瞧避行魄较，缛感了在几秘嚣线 性情撼下，拱褥弯矩埔大系数的纂本娥律。 本文为以嚣拱辑弯短壤大系数豹避一步研究积累了经验。 关键谜：搽褫，弯矩增大系激，几旃嚣线髓 嚣南交遴大学硕士研究生学位论文 嚣南交遴大学硕士研究生学位论文 第l l页 Abstract Arch bridge is all imporfant bridge style of bridge constructions in our country．With increase span of arch bridge，how to consider the effect of nonlinear problem on the intemal force concretely becomes urgent． In general，the internal force was gained through a moment magnifier,which time the results from the elastic theory．Nevertheless。this coe接cient tends to conservate．For the more precise calculation of internal force，this paper made a special analysis on reinforced concrete arch bridge and discussed on moment magnifier according to the factors of arch bridge themselves． Firstly,this paper introduced the research on the moment magnifier home and abroad and also its application in((Bridge Code》in China Roads．SecondlN it discussed the deflection in stability of arch bridge and geometry nonlinear theory on ultimate load-carD4ng ability．And at last，utilizing software ANSYS，I computed the intemal force separately of60m、80m、100m arch bridge，achieved a theoretical result of moment magnifier coefficients and then compared them with moment magnifier coefficients from((Bridge Code))in China Roads． This paper also accumulates the experience for further study of moment magnifier． Keywords：arch bridge，moment magnifier,geometric nonlinear 西南交蘧犬拳碛主磷突奎渗禳沦交 西南交蘧犬拳碛主磷突奎渗禳沦交 繁{贾 第l章 绪论 {，{挟攒熬掰史翻现状 1，1，1拱桥的逝史 摸桥在我谬其膏悠久煎膨变，我誉静摸桥修建技术淹毽弊桥梁 兜擞氆了不霹黪灭豹菠歙，黼且剁造并像持了多项记淤，在公元l 菠纪弱公元{t毽纪熬1000多年爨，我鬻黪揆蒋擎建接零这蚕了螯 界的最鼹水平，始建予公元595年的河北赵县寮济桥(赵州桥)是世 群主最留意黎裁霞挨爨羧纛捩羲，i999荦建袋懿盘嚣努溪赣紧≤磊 砌拱桥146．Om)和1997年建成的黧庆万撼长江丈桥(膀径420．Om钢 餐漫蒙圭蘩鳇案契≥分嶷裂逡了弱类墼攒粱魏{鼗器纪聚，具蠢悠久 历史的中国拱桥将农新世筑的桥梁