【摘要】：當(dāng)前,國際橋梁工程設(shè)計(jì)的主流方法已經(jīng)完成了由容許應(yīng)力法向基于可靠度理論的極限狀態(tài)法的轉(zhuǎn)變。我國鐵路橋梁工程目前仍然采用容許應(yīng)力法進(jìn)行設(shè)計(jì)計(jì)算,而日本、歐洲、美國等發(fā)達(dá)國家均采用基于可靠度理論的極限狀態(tài)設(shè)計(jì)方法。為了和國際接軌,目前我國正在進(jìn)行鐵路橋梁設(shè)計(jì)規(guī)范由容許應(yīng)立法轉(zhuǎn)為極限狀態(tài)法的工作。 本文在2011年版《鐵路橋涵設(shè)計(jì)規(guī)范(極限狀態(tài)法)》(送審稿)有關(guān)研究成果的基礎(chǔ)上,借鑒國內(nèi)外規(guī)范的先進(jìn)技術(shù)和研究成果,調(diào)研并收集有關(guān)資料,編寫鐵路橋梁重力式墩臺(tái)截面計(jì)算程序,以現(xiàn)行橋規(guī)和工程實(shí)踐經(jīng)驗(yàn)為依托,對(duì)鐵路橋梁圓端形空心墩,實(shí)體墩可靠度指標(biāo)進(jìn)行檢算。在可靠度指標(biāo)計(jì)算過程中,進(jìn)行了作用參數(shù)的統(tǒng)計(jì)工作,對(duì)作用進(jìn)行了分類計(jì)算。為了計(jì)算截面受壓區(qū)面積,編寫了圓端形橋墩截面受壓區(qū)面積計(jì)算程序。對(duì)圓端形空心墩和實(shí)體墩5套標(biāo)準(zhǔn)圖176個(gè)橋墩進(jìn)行了正常使用極限狀態(tài)和承載能力極限狀態(tài)可靠度指標(biāo)的檢算,并對(duì)檢算結(jié)果進(jìn)行了分析。 依據(jù)2011年版《鐵路橋涵設(shè)計(jì)規(guī)范(極限狀態(tài)法)》(送審稿)關(guān)于樁基礎(chǔ)的規(guī)定編寫了樁基礎(chǔ)單樁承載力計(jì)算程序,程序包括四個(gè)計(jì)算模塊,分別為：打入、震動(dòng)下沉和樁尖爆擴(kuò)樁；鉆(挖)孔灌注樁；巖石層上的打入、震動(dòng)下沉樁(包括管柱)；支撐于巖石層上與嵌入巖石層內(nèi)的鉆(挖)孔灌注樁及管柱。對(duì)比了我國規(guī)范與歐洲規(guī)范關(guān)于樁基礎(chǔ)的的規(guī)定。選擇了兩個(gè)算例,依據(jù)歐洲規(guī)范和我國規(guī)范進(jìn)行了對(duì)比計(jì)算,并用編寫的樁基礎(chǔ)單樁承載力計(jì)算程序?qū)λ憷M(jìn)行了計(jì)算。通過對(duì)結(jié)果的對(duì)比,分析我國規(guī)范與歐洲規(guī)范的樁基礎(chǔ)計(jì)算結(jié)果差異。為將來新規(guī)范下樁基礎(chǔ)的樁側(cè)抗力分項(xiàng)系數(shù)和樁端抗力分項(xiàng)系數(shù)的修訂提供數(shù)據(jù)支持。
[Abstract]:At present, the mainstream method of international bridge engineering design has completed the transition from the allowable stress method to the limit state method based on reliability theory. At present, the allowable stress method is still used in the design and calculation of railway bridge engineering in China, while in Japan, Europe, the United States and other developed countries, the limit state design method based on reliability theory is adopted. In order to connect with the international standards, the design code of railway bridges is being changed from the allowable legislation to the limit state method. On the basis of the relevant research results of 2011 edition of Railway Bridge and culvert Design Code (limit State method) (submitted draft), this paper draws lessons from the advanced technology and research results of domestic and foreign norms, investigates and collects relevant data. Based on the existing bridge rules and engineering experience, the calculation program of gravity pier and abutment section of railway bridge is compiled to check and calculate the reliability index of round end hollow pier and solid pier of railway bridge. In the process of calculating the reliability index, the statistical work of the action parameters is carried out, and the action is classified and calculated. In order to calculate the area of the section under pressure, a program is developed for calculating the area of the section of the round end pier. The reliability indexes of the limit state of normal use and the limit state of bearing capacity of 176 piers are checked and calculated for 5 sets of standard figure of round end hollow pier and solid pier, and the results are analyzed. According to the regulations of the 2011 edition of the Code for Design of Railway Bridges and culverts (limit State method) on pile foundation, the calculation program of single pile bearing capacity of pile foundation is compiled. Vibration sinking and pile tip exploding pile; drilling-hole cast-in-place pile; driving on rock stratum, driving pile under vibration (including pipe string); drilling (digging) pile and pipe string supported on and embedded in rock stratum. The regulations on pile foundation of Chinese code and European code are compared. Two calculation examples are selected and calculated according to the European Code and the Chinese Code. The calculation examples are calculated with the program compiled for calculating the bearing capacity of single pile on the pile foundation. By comparing the results, the difference of pile foundation calculation results between Chinese code and European code is analyzed. It provides the data support for the revision of pile side resistance coefficient and pile end resistance coefficient under the new specification.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.13;U442

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