本文選題：雙柱墩　切入點(diǎn)：橫系梁　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在已建和在建的橋梁結(jié)構(gòu)中,預(yù)制T梁和預(yù)制小箱梁,以其獨(dú)特的優(yōu)勢(shì)(如施工工期較短,預(yù)制工廠的設(shè)備先進(jìn)使其質(zhì)量有保證,受施工現(xiàn)場(chǎng)環(huán)境的影響小等),得到了廣泛的應(yīng)用。與預(yù)制梁結(jié)構(gòu)配合使用的下部結(jié)構(gòu)通常采用的是單柱墩、雙柱墩以及多柱墩。對(duì)于雙柱墩與多柱墩,當(dāng)墩柱超過一定的高度時(shí),一般會(huì)在墩柱中設(shè)置橫系梁,以增加墩柱的整體性與穩(wěn)定性。然而,橫系梁的設(shè)置對(duì)雙柱墩的抗震性能的影響卻沒有一致的結(jié)論,對(duì)其研究也比較少。有人認(rèn)為設(shè)置橫系梁有助于雙柱墩的抗震,因?yàn)樵黾訖M系梁會(huì)增加雙柱墩的抗推剛度,提高結(jié)構(gòu)的承載力。有的人認(rèn)為設(shè)置橫系梁對(duì)雙柱墩抗震不利,因?yàn)闀?huì)降低結(jié)構(gòu)的位移延性,而且在地震中,一些橋墩的彎剪破壞就發(fā)生在系梁與雙柱墩相交的位置。系梁設(shè)置對(duì)于抗震,是有利還是不利,本文通過SAP2000,進(jìn)行了雙柱墩的Pushover分析。本文采用纖維單元模型對(duì)結(jié)構(gòu)的抗力、位移延性、內(nèi)力等進(jìn)行了分析,以探討系梁設(shè)置對(duì)雙柱墩抗震性能的影響和系梁的合理設(shè)置方案。本文具體進(jìn)行了如下的計(jì)算分析:①對(duì)比有系梁與無系梁雙柱墩,分析系梁的設(shè)置將對(duì)雙柱墩的承載力、位移延性、內(nèi)力等產(chǎn)生怎樣的影響。橫系梁的合理截面尺寸的異同。②在雙柱墩墩中設(shè)置一道系梁,改變系梁設(shè)置的位置。尋找一道系梁設(shè)置的②在雙柱墩墩中設(shè)置一道系梁,改變系梁設(shè)置的位置。尋找一道系梁設(shè)置的合理位置。③在雙柱墩墩中設(shè)置一道系梁,改變系梁的截面尺寸,得出一道系梁的合理截面尺寸。④在墩柱中設(shè)置兩道橫系梁,改變系梁的截面尺寸,探討系梁的合理截面尺寸。并討論設(shè)置一道與兩道橫系梁的合理截面尺寸的異同。⑤通過比較不設(shè)橫系梁、設(shè)置一道橫系梁、設(shè)置兩道橫系梁的雙柱墩模型計(jì)算結(jié)果,討論系梁設(shè)置道數(shù)對(duì)雙柱墩抗震性能的影響。
[Abstract]:Among the bridge structures under construction, prefabricated T-beams and prefabricated small box girders have their unique advantages (such as short construction period, advanced equipment in the prefabricated plants to ensure their quality, etc.). The substructure used with precast beam structure is usually single column pier, double column pier and multi-column pier. When the pier column is above a certain height, the transverse beam is generally set in the pier column to increase the integrity and stability of the pier column. However, there is no consistent conclusion that the installation of the crossbar beam affects the seismic behavior of the double-column pier. Some people think that setting crossbar beam is helpful to the earthquake resistance of double-column pier, because the increase of transverse beam will increase the pushing stiffness of double-column pier and increase the bearing capacity of structure. Some people think that setting crossbar beam is unfavorable to the aseismic resistance of double-column pier. Because it can reduce the displacement ductility of the structure, and in the earthquake, the bending and shear failure of some bridge piers occur in the position where the tie beam intersects with the double column pier. In this paper, the Pushover analysis of double column pier is carried out by SAP 2000. The resistance, displacement ductility and internal force of the structure are analyzed by fiber element model. In order to discuss the influence of the installation of the tie beam on the seismic behavior of the double column pier and the reasonable arrangement scheme of the tie beam, the following calculation and analysis are carried out in this paper. The bearing capacity of the double column pier will be analyzed by comparing the tied beam with the non-tied beam double column pier by using the following calculation and analysis in this paper. What is the influence of displacement ductility, internal force, etc. The differences and similarities of the reasonable section dimensions of the transverse tie beam are as follows: 2. A tie beam is arranged in the double column pier to change the position of the tie beam, and a tie beam is set in the double column pier. Change the position of the tie beam. 3. Find the reasonable position of a tie beam. .3 set a tie beam in the pier of double column pier, change the cross section size of the tie beam, and get the reasonable section size of a tie beam. 4. Set two transverse tie beams in the pier column. By changing the cross section size of the tie beam, the reasonable section size of the tie beam is discussed, and the similarities and differences between the reasonable section size of one beam and that of the two transverse tie beams are discussed. The calculation results of double column pier model with two beams are discussed. The influence of the number of track on the aseismic performance of double column pier is discussed.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U442.55

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本文編號(hào)：1612780