新型简易隔震技术理论与试验研究
发布时间：2019-04-12 06:44
【摘要】：本文提出一种新型简易隔震支座—工程塑料板简易隔震橡胶支座,该支座采用不饱和聚酯纤维加强复合材料板替代普通橡胶隔震支座中的钢板,具有重量轻、造价低、便于运输与施工、适合于低矮村镇建筑等优点。本文基于简易隔震支座进行了以下主要研究工作:(1)基于普通橡胶支座的刚度理论,本文对比分析了简易隔震支座的理论刚度与试验刚度,修正了简易隔震支座的竖向极限面压的公式。简易隔震支座在大变形情况下出现翘曲变形的现象,推导了水平极限变形时支座翘曲变形的位移公式,验证了支座大变形的极限剪应变。(2)研发了多种型号的简易隔震支座,分别采用不同剪切模量的G4和高阻尼的G6橡胶,研发了方形简易隔震以及长宽比例2:1的矩形简易隔震支座。对简易隔震支座进行了系统的压缩特性、水平剪切特性、压应力相关性、剪应变相关性、频率相关性、温度相关性、阻尼特性以及极限性能等力学性能试验。试验结果表明:方形与矩形简易隔震支座均性能稳定,G6型支座竖向刚度与水平刚度均优于G4型支座,普通G4橡胶的简易支座具有一定的阻尼特性,高阻尼G6橡胶的简易支座达到设计要求的阻尼性能。(3)采用ABAQUS建立了简易隔震支座的有限元模型,分析了支座竖向和水平作用时的应力应变状态,对比分析了矩形支座在长短两个方向上不同剪切变形时的应力应变状态。改变支座封板的厚度,探索了封板对支座的性能影响,以及在竖向和水平作用时,对内部橡胶层和板层的应力状态分布的影响;同时也通过改变内部橡胶层与板层厚度,从而改变支座内板层与橡胶层的厚度比,探索板/橡胶层厚比变化对支座的性能影响,以及对内部橡胶层和板层的应力状态分布的影响。(4)现有的隔震结构体系都要求进行专业的隔震设计,但这对于面大量广的村镇隔震结构而言是不现实的,本文根据村镇结构的类型(以砌体结构为主)、层数与当地的设防烈度,场地类别以及隔震性能目标提出基于反应谱法的村镇建筑实用设计方法,给出了简易隔震的设计流程。(5)本文基于简易隔震支座提出了一整套适用于村镇建筑的简易隔震连接构造与施工工艺,以及相应的限位措施。本文提出的这种简易隔震技术经济有效、简单易行,可望在不发达村镇地区普及推广,具有重要的科学理论价值、现实意义与应用前景。
[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.
【学位授予单位】：广州大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：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.
【学位授予单位】：广州大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TU352.12
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