【作者】 程达；

【导师】 金伟良； 干钢；

【作者基本信息】 浙江大学 ， 结构工程， 2006， 硕士

【摘要】 随着高层建筑结构的发展,新材料、新技术的应用,使得钢—混凝土组合结构体系发生了重大变化,其中型钢混凝土节点在整个结构体系中的性能显得尤为重要。在土木工程领域中开展这种新型结构的性能研究是很有必要的。 由于型钢混凝土材料本身是非线性材料,本文根据研究的需要,通过将多种不同的本构关系在有限元模型上试算,建立了比较合理的非线性有限元模型。 首先,推导了文中提出的型钢混凝土梁柱节点,处于轴向压力作用下,核心区混凝土平均抗压强度公式;并将该公式与其他文献指出的型钢混凝土整体抗压强度公式进行了对应分析。 再次,通过ANSYS中的混凝土单元Solid65模拟型钢混凝土节点,共对五种不同混凝土强度等级节点进行了非线性有限元模拟分析,分别得出了初裂、破坏荷载、应力、位移、层间变形等结果。综合分析本文设计的型钢混凝土节点的抗裂度、抗剪承载力、型钢与混凝土剪应力、裂缝开展情况以及抗震性能,并与试验研究资料进行比较。与此同时,还对影响节点性能的重要因素进行了研究,包括混凝土强度和柱轴向压力等。 本文的最后一部分,是利用超声检测分析仪检测桥梁的健康状况,分析桥梁的裂缝分布,为桥梁的加固分析计算提供理论依据。然后采用粘锚组合加固技术,对桥梁破坏处进行粘贴钢板加固修复,对节点处进行灌浆处理,并对受轴向压力拱肋进行周向粘锚钢板,从而形成套箍作用,提高承载力。这一工程实例说明了这种技术在实际工程应用中的可行性。更多还原

【Abstract】 As the development of high-rise buildings and new materials, the steel reinforced concrete (SRC) structural system have had the tremendous change. Meanwhile, the capability of SRC Beam-Column Joints become more important in the whole structural system, therefore, it’s necessary to study the new structural pattern.Because the materials in SRC are nonlinear structural materials, a new three-dimensional nonlinear finite element model of proposed SRC beam-column joints in this paper. mostly based on the content of research.Firstly, under triaxial compression,average compressive strength formula of concrete will be proposed in the central part of SRC beam-column jionts will be proposed in this paper.The formula with the whole compressive strength formulas of SRC is compeare,which are pointed out in other literaturesSecondly,by using 3-D Reinforced Concrete Solid in ANSYS, SRC joints of five strength grades have been nonlinear analyzed and achieved the cracking, extreme load, stress, displacement and interlaminar deformation respectively. With the SRC jionts model, the crack resistance capacity, the shear strength, shear stress of steel and concrete, cracks form and aseismic behavior have been synthetically analyzed, which are proposed in this paper. The results have been compared with the data of other reference tests. Also, the main influence factors of SRC beam-column joints including concrete strength and the axial pressure of column are studied in this paper.In the last part of the paper, health situation of bridges has been detected non-metal by ultrasonic tester, and distribution of structural fractures has been evaluated on, which could provide theoretical basis for reinforcement analysis. Then the cracking areas of bridge are reinforced and renovated by the composite reinforcement technique of anchoring bond, and jonts are also dealed with by concrete pouring technology. Meanwhile, arch rib, which is exerted axial pressure on, are bonded and anchored steel plates, thus created casing hoop effect and ehance bearing capability come into being. This example illustrates that the feasibility of the technique can work in the practical application of engineering.更多还原