新型簡易隔震技術(shù)理論與試驗(yàn)研究
發(fā)布時(shí)間：2019-04-12 06:44
【摘要】：本文提出一種新型簡易隔震支座—工程塑料板簡易隔震橡膠支座,該支座采用不飽和聚酯纖維加強(qiáng)復(fù)合材料板替代普通橡膠隔震支座中的鋼板,具有重量輕、造價(jià)低、便于運(yùn)輸與施工、適合于低矮村鎮(zhèn)建筑等優(yōu)點(diǎn)。本文基于簡易隔震支座進(jìn)行了以下主要研究工作:(1)基于普通橡膠支座的剛度理論,本文對(duì)比分析了簡易隔震支座的理論剛度與試驗(yàn)剛度,修正了簡易隔震支座的豎向極限面壓的公式。簡易隔震支座在大變形情況下出現(xiàn)翹曲變形的現(xiàn)象,推導(dǎo)了水平極限變形時(shí)支座翹曲變形的位移公式,驗(yàn)證了支座大變形的極限剪應(yīng)變。(2)研發(fā)了多種型號(hào)的簡易隔震支座,分別采用不同剪切模量的G4和高阻尼的G6橡膠,研發(fā)了方形簡易隔震以及長寬比例2:1的矩形簡易隔震支座。對(duì)簡易隔震支座進(jìn)行了系統(tǒng)的壓縮特性、水平剪切特性、壓應(yīng)力相關(guān)性、剪應(yīng)變相關(guān)性、頻率相關(guān)性、溫度相關(guān)性、阻尼特性以及極限性能等力學(xué)性能試驗(yàn)。試驗(yàn)結(jié)果表明:方形與矩形簡易隔震支座均性能穩(wěn)定,G6型支座豎向剛度與水平剛度均優(yōu)于G4型支座,普通G4橡膠的簡易支座具有一定的阻尼特性,高阻尼G6橡膠的簡易支座達(dá)到設(shè)計(jì)要求的阻尼性能。(3)采用ABAQUS建立了簡易隔震支座的有限元模型,分析了支座豎向和水平作用時(shí)的應(yīng)力應(yīng)變狀態(tài),對(duì)比分析了矩形支座在長短兩個(gè)方向上不同剪切變形時(shí)的應(yīng)力應(yīng)變狀態(tài)。改變支座封板的厚度,探索了封板對(duì)支座的性能影響,以及在豎向和水平作用時(shí),對(duì)內(nèi)部橡膠層和板層的應(yīng)力狀態(tài)分布的影響;同時(shí)也通過改變內(nèi)部橡膠層與板層厚度,從而改變支座內(nèi)板層與橡膠層的厚度比,探索板/橡膠層厚比變化對(duì)支座的性能影響,以及對(duì)內(nèi)部橡膠層和板層的應(yīng)力狀態(tài)分布的影響。(4)現(xiàn)有的隔震結(jié)構(gòu)體系都要求進(jìn)行專業(yè)的隔震設(shè)計(jì),但這對(duì)于面大量廣的村鎮(zhèn)隔震結(jié)構(gòu)而言是不現(xiàn)實(shí)的,本文根據(jù)村鎮(zhèn)結(jié)構(gòu)的類型(以砌體結(jié)構(gòu)為主)、層數(shù)與當(dāng)?shù)氐脑O(shè)防烈度,場(chǎng)地類別以及隔震性能目標(biāo)提出基于反應(yīng)譜法的村鎮(zhèn)建筑實(shí)用設(shè)計(jì)方法,給出了簡易隔震的設(shè)計(jì)流程。(5)本文基于簡易隔震支座提出了一整套適用于村鎮(zhèn)建筑的簡易隔震連接構(gòu)造與施工工藝,以及相應(yīng)的限位措施。本文提出的這種簡易隔震技術(shù)經(jīng)濟(jì)有效、簡單易行,可望在不發(fā)達(dá)村鎮(zhèn)地區(qū)普及推廣,具有重要的科學(xué)理論價(jià)值、現(xiàn)實(shí)意義與應(yīng)用前景。
[Abstract]:This paper presents a new type of simple isolation bearing-engineering plastic plate simple isolation rubber bearing, which uses unsaturated polyester fiber reinforced composite plate instead of steel plate in common rubber isolation bearing, which has the advantages of light weight and low cost. Convenient for transportation and construction, suitable for low-rise village buildings and other advantages. The main research work of this paper is as follows: (1) based on the stiffness theory of ordinary rubber bearings, the theoretical stiffness and test stiffness of simple isolation bearings are compared and analyzed in this paper. The formula of vertical limit surface pressure of simple isolation bearing is modified. Under the condition of large deformation, the displacement formula of support warpage in horizontal limit deformation is derived, and the displacement formula of bearing warpage in large deformation condition is deduced, and the displacement formula of bearing warpage in horizontal limit is derived. The ultimate shear strain of the bearing with large deformation has been verified. (2) A variety of simple isolation bearings have been developed, using G4 with different shear modulus and G6 rubber with high damping, respectively. A square simple isolation bearing and a rectangular simple isolation bearing with a length-width ratio of 2:1 have been developed. The compression characteristics, horizontal shear characteristics, compressive stress dependence, shear strain dependence, frequency dependence, temperature dependence, damping characteristics and limit properties of the simple isolation bearing are tested. The test results show that the performance of square and rectangular simple isolation bearings is stable, the vertical stiffness and horizontal stiffness of G6 bearings are better than G4 bearings, and the simple bearings of general G4 rubber have certain damping characteristics. The simple bearings of high damping G6 rubber meet the design requirements of damping properties. (3) the finite element model of simple isolation bearings is established by using ABAQUS, and the stress-strain state of the bearings under vertical and horizontal action is analyzed. The stress-strain state of rectangular support under different shear deformation in two directions is analyzed. By changing the thickness of the sealing plate, the influence of the sealing plate on the performance of the support and the stress distribution of the inner rubber layer and the laminate under vertical and horizontal action are explored. At the same time, by changing the thickness of the inner rubber layer to the rubber layer, the thickness ratio of the inner layer to the rubber layer of the bearing is changed, and the influence of the change of the thickness ratio of the plate / rubber layer on the performance of the bearing is explored. (4) the existing seismic isolation structure systems require professional isolation design, but this is not realistic for a large number of village and town isolation structures with a large number of areas, and the impact on the stress state distribution of the inner rubber layer and the laminate layer is also discussed. (4) the existing seismic isolation structure system requires professional isolation design. In this paper, a practical design method based on response spectrum method is put forward according to the type of village structure (mainly masonry structure), story number and local fortification intensity, site type and seismic isolation performance target, and the practical design method of village building based on response spectrum method is put forward in this paper. The design flow of simple isolation is given. (5) based on the simple isolation bearing, a set of simple isolation connection structure and construction technology suitable for village and town buildings are proposed in this paper, as well as the corresponding limiting measures. The simple isolation technology proposed in this paper is economical, effective, simple and easy to carry out. It is expected to be popularized in underdeveloped villages and towns. It has important scientific theoretical value, practical significance and application prospect.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.12
[Abstract]:This paper presents a new type of simple isolation bearing-engineering plastic plate simple isolation rubber bearing, which uses unsaturated polyester fiber reinforced composite plate instead of steel plate in common rubber isolation bearing, which has the advantages of light weight and low cost. Convenient for transportation and construction, suitable for low-rise village buildings and other advantages. The main research work of this paper is as follows: (1) based on the stiffness theory of ordinary rubber bearings, the theoretical stiffness and test stiffness of simple isolation bearings are compared and analyzed in this paper. The formula of vertical limit surface pressure of simple isolation bearing is modified. Under the condition of large deformation, the displacement formula of support warpage in horizontal limit deformation is derived, and the displacement formula of bearing warpage in large deformation condition is deduced, and the displacement formula of bearing warpage in horizontal limit is derived. The ultimate shear strain of the bearing with large deformation has been verified. (2) A variety of simple isolation bearings have been developed, using G4 with different shear modulus and G6 rubber with high damping, respectively. A square simple isolation bearing and a rectangular simple isolation bearing with a length-width ratio of 2:1 have been developed. The compression characteristics, horizontal shear characteristics, compressive stress dependence, shear strain dependence, frequency dependence, temperature dependence, damping characteristics and limit properties of the simple isolation bearing are tested. The test results show that the performance of square and rectangular simple isolation bearings is stable, the vertical stiffness and horizontal stiffness of G6 bearings are better than G4 bearings, and the simple bearings of general G4 rubber have certain damping characteristics. The simple bearings of high damping G6 rubber meet the design requirements of damping properties. (3) the finite element model of simple isolation bearings is established by using ABAQUS, and the stress-strain state of the bearings under vertical and horizontal action is analyzed. The stress-strain state of rectangular support under different shear deformation in two directions is analyzed. By changing the thickness of the sealing plate, the influence of the sealing plate on the performance of the support and the stress distribution of the inner rubber layer and the laminate under vertical and horizontal action are explored. At the same time, by changing the thickness of the inner rubber layer to the rubber layer, the thickness ratio of the inner layer to the rubber layer of the bearing is changed, and the influence of the change of the thickness ratio of the plate / rubber layer on the performance of the bearing is explored. (4) the existing seismic isolation structure systems require professional isolation design, but this is not realistic for a large number of village and town isolation structures with a large number of areas, and the impact on the stress state distribution of the inner rubber layer and the laminate layer is also discussed. (4) the existing seismic isolation structure system requires professional isolation design. In this paper, a practical design method based on response spectrum method is put forward according to the type of village structure (mainly masonry structure), story number and local fortification intensity, site type and seismic isolation performance target, and the practical design method of village building based on response spectrum method is put forward in this paper. The design flow of simple isolation is given. (5) based on the simple isolation bearing, a set of simple isolation connection structure and construction technology suitable for village and town buildings are proposed in this paper, as well as the corresponding limiting measures. The simple isolation technology proposed in this paper is economical, effective, simple and easy to carry out. It is expected to be popularized in underdeveloped villages and towns. It has important scientific theoretical value, practical significance and application prospect.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.12
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