Draw some valuable conclusions by the calculation analysis of the anchorage zones of cable support tower and beam , and the steel mix joint part of of the road bridge surface , which will have some instruction meaning and reference value to the design and construction of the anchorage zone of the similar bridge 通过对天兴洲大桥的索塔锚固区、索梁锚固区以及公路桥面板的钢混结合段的计算分析，得出一些有价值的结论，对今后同类桥型锚固区的设计、施工具有一定的指导意义和参考价值。
Firstly , the domestic researches , which have been reported , are introduced . then the characteristic of the system in estimation of prestressing losses is analyzed by theoretical method , and the reasons that the elimination of tendon is large and test results are not consistent are pointed . using fem software ansys , anchorage zone of pylon are analyzed 论文首先介绍了国内现阶段对该问题的一些研究成果，然后从理论上分析了小半径大吨位环向预应力体系在计算预应力损失方面的特点和造成张拉伸长量偏大且实测的数据离散性较大的原因，并采用国际权威的有限元分析软件? ? ansys从理论上进行分析和索塔锚固区最不利节段的足尺寸模型试验进行校验。
Choose appropriate verge condition for its anchorage zone , and construct a three dimensional space finite element analysis model by using ansys , caculate the distribution complexion of strain field in the anchorage zone , and analyze the majors factor which affect the safty capability of anchorage zone , so as to put forward some concrete measures to improve the distribution of local internal force , and draw the relevant conclusion 对索塔锚固区选取合适的边界条件，利用ansys建立三维空间有限元分析模型，计算索塔锚固区的应力场分布情况，并分析影响锚固区安全性能的主要因素，提出改善局部应力分布的具体措施，并得出相应的结论。
3 . a space bond slip relation of reinforcements in either end of a member is proposed , based on one - dimensional bond slip model of reinforcements proposed by teng zhiniirmg from tsinghua university , the first - time loaded ascending stage ? curve of which model is modified as the line which parameters are not changed so as to simply the computation . the bond , slip is regarded as the boundary nonlinearity of a member 3 、采用清华大学滕智明建议的一维钢筋粘结滑移恢复力模型，但从简化计算的角度出发，将首次加载的上升段曲线改为直线，并假定构件端部的诸多纵向钢筋的滑移服从平截面假定，考虑由节点锚固区粘结滑移引起的构件端截面轴向和两转角附加变形。
This thesis aims to analyze how to select and assign prestressed tendon , how to design anchorage bearing joint , how to control the crack , how to calculate the axial prestressed force and the third moment and how to design the edge column of top layer . on the base of the research in and out our country and construction of the prestressed structure , some helpful conclusion and suggestion are presented , which is suggestive for the design and construction of long span continuous prestressed concrete frame 本文将综合设计与施工两个方面，对预应力筋的选用、布置，锚固区的设计及构造处理，裂缝问题，侧向约束对梁轴向预压应力及柱中第三弯矩的影响，顶层大跨边柱设计等几个问题进行系统的分析研究，并在国内外研究和大量工程实践的基础上，提出了一些建议和预防措施，对此类工程设计和施工有一定的参考价值。
On basis of collecting information about the application of prestressing system to anchorage zone of pylon for cable - stayed bridge , theoretical analysis and full - scale mode test are carried out to research the application of circular prestressing system which radius is small and prestressing force is strong 在收集了国内有关斜拉桥索塔锚固区预应力体系应用情况资料的基础上，对小半径大吨位环向预应力体系在工程实践中的应用进行了理论分析和足尺寸模型试验研究。
Stress response of the tower wall at the least favorable section of all of the single section on the cable tower anchor segments of the cable - stayed bridge was studied under the annular pre - stress with cable force and tensile force by comparing the experiment results of the full - scale model of segment with the results of the finite element simulation analysis according to the forced status of the cable tower under practical conditions 摘要通过索塔锚固区节段足尺模型试验结果和有限元仿真分析比较，结合索塔受力的实际工况，对异型截面斜拉桥索塔锚固区节段最不利断面在环向预应力与索力共同作用下塔壁的应力响应进行了研究。
Consideration of the additional axial , two angular deformations generated by the bond slipping in anchorage zones of joints , the assumption is made , that the plane section of either end of a member before bond slipping of reinforcements remains afler bond slipping of reinforcements . additional deformations * contribution to stif ? nesses of plastic sub - elements is formed from the boundary nonlinearity of plastic stabelements . the space bond slip relation can truly compute bond slip in anchorage zones , additional def ? rmatinns , and their contribution to the space nonlinearity of a niember , has used iii space nonlinear analysis of columns and spandrel beams in this dissertation 附加变形对塑性子区域的刚度贡献，看作是塑性子区域的边界非线性，建立了构件端部子区域基于构件边界非线性的钢筋与砼之间的空间粘结滑移关系，能较真实地求得锚固区的粘结滑移、附加变形以及他们对构件空间非线性性能的贡献，并运用于柱、裙梁的空间非线性分析之中。
For example , the large friction loss of prestressed tendons , complex anchorage bearing joint , the problem of cracks in large area structure , axial compress of long span continuous beam under prestress . all those hinder its use in long span structure . until now days , the cognition about the behavior of such structure under loads is not enough for the realm of prestressed concrete of all the world 但是，预应力技术应用于大跨连续框架结构，在设计和施工中还存在一些缺点和不足，例如预应力筋的摩擦损失过大，节点锚固区设计和构造复杂、大面积结构的裂缝控制问题、大跨框架梁在预应力作用下的轴向缩短等，这些都是困扰大跨预应力混凝土框架结构应用的突出问题，特别是目前对于预应力混凝土超静定结构的受力性能，国内外预应力界的认识尚不够全面。
