大跨度公铁两用斜拉桥结构特性分析.pdf

太跨度公铁两用斜拉挢结构特性分析中文摘要摘要主跨312m的公铁两用斜拉桥?芜湖大桥的建成通车,标志着我国铁路斜拉桥的建设已进入一个新的发展时期,为了适应我国铁路斜拉桥向要大跨度、更高车速方向发展的要求,对太跨度公铁两用斜拉桥结梅特性进行分析研究刘成为蘩遭两重簧的谦题。本论文以我罄耘建中昀菜大跨度公铁嚣矮斜拉挢为王程鹜暴,系统诗算分专譬了其静、动力特性,并藩重探讨了大跨度公铁溪月斜拉援的结专鸯特性及其合理结构体系。首先,本文在总结分析国内外已建大跨度铁路斜拉桥结构特征的基础上,针对我国拟建大跨度公铁两用斜拉桥活载重、铁路设计车速高的特点,建立了大跨度公铁两用斜拉桥空间计算模型。根据拟建中大跨度公铁两用斜拉桥可行性报告所提出的两种不问桥面系结构分别建立计算模型,并对其静、动力特性进行研究。重点探讨了不同桥面系对大跨度公铁褥用斜拉桥静、动力受力特性的影响,并分析了结构死何j}线幢问题。其次,嘏器工程设计不夏除段计算糖凄可以有所不露及篱诧诗算的实际爨要,对桥露系为纵横、粱体系岣大跨度公铁鼹周辩拉桥的空间结构进行合理简化,建立平颟计算模型,总和比较空问计算模型和平面计算模型的静、动力特性。初步确立了大跨度公铁两用斜拉桥呆用平面模型计算其静、动力特性所引起的误差。最后,对不同结构体系的大跨度公铁两用斜拉桥分别建立计算模型,并对其进行静、动力分析比较。同时,还比较了温度效应对不同大跨度公铁两用斜拉桥结构特性分析中文摘要结构体系的大跨度公铁两用斜拉桥主跨各典型杆件及各典型截面的内力影响,初步分析了各结构体系的优缺点。此外,本文还系统的探讨了加劲索的截面面积对大跨度公铁两用斜拉桥结构内力及其变形的影响。关键词:大跨度公铁两用斜拉桥结构特性桥面系结构体系静、动力特性大跨度公铁两用斜拉桥结构特性分析英文摘要 Abstract pletion of bined Road with Railway Cable—Stayed Bridge indicated China’Snew age ofrailway cable—stayed order modate withdevelop oftherailway cable--stayed bridge,it isvery important to analysis thestructural characteristics of long bined roadwithrailway Cable-Stayed paper is about a long bined road with railway Cable—Stayed Bridge, which is bridge’S characteristics of static state anddynamic state are analyzed,The structural characteristics and proper structure system oflong bined road with railway Cable—Stayed Bridge are emphasized on. At featuresoflong span railway cable—stayed bridges thathave been constructed inthe world are the basis ofabove,the three-dimensional model bined road and railway cable—stayed bridge effect ofdifferent deck systems on mechanical characteristics ofthebridge isprobed mainly Moreover,the geometry nonlinear ofthebridge structure isinvestigated. Secondly,according to engineering design moment,calculate precision isdistinct and predigest calculation’Srequirement isdifferent. Spatial model ispre—digested toplane bridge’S characteristics ofstatic state and dynamic state pared witheachothe