新老混凝土界面往往是混凝土结构的薄弱界面。
研究了国内外新老混凝土结合面一般采取的措施。
General measures of interface between new and old concrete throughout the world were studied.
并对新老混凝土粘结面冻融损伤机理进行了探讨。
The freezing deteriorate mechanism of concrete itself and adherence of new-old concrete were discussed.
对新老混凝土的粘结问题的研究具有深远的现实意义。
The research on adherence of the new-to-old concrete has become profound significance.
针对新老混凝土修补界面薄弱过渡区的特点，提出改善方法。
A method was proposed to counter the feature of repair at interfacial transition zone between old and new concrete.
给出了沟槽式新老混凝土粘结的设计思路，并且应用于实际工程。
The design method of new to old concrete with cutting groove is given, and this is applied to the project strengthening.
最后，给出提高新老混凝土界面粘结强度和降低粘结面剪应力的方法。
At last, the approach of increasing bonding strength and decreasing shearing stress is presented.
从应力分析角度研究在劈拉荷载作用下，新老混凝土粘结的应力分布规律。
The stress distribution law of adherence of young on old concrete under splitting-tension load is studied as viewed from stress analysis.
利用BP人工神经网络对沟槽式新老混凝土的抗剪强度进行了模拟和预报。
The BP artificial neural network prediction model is established for forecasting the shearing strength of new to old concrete with cutting groove.
而在界面上植入抗剪钢筋后，能大幅度提高了新老混凝土的粘结抗剪强度。
As interfacial agent, the mix of cement and fly ash can improve the adhesive shear strength. After planted reinforced bar, the shear strength of new and existing concrete increases greatly.
阐述了新老混凝土粘结结构的当前研究现状，提出了本文主要的研究内容。
The main results are summarized as follows:1 , The development and the use in fact of adhesive structure of new to old concrete are expounded.
新老混凝土粘结是工程施工与老化病害结构修补补强中经常面临的一个问题。
Binding of new and used concrete is a issue often facing to project implementation and old and poor structure maintenance.
对新老混凝土粘结的微观机理进行了分析，认为新老混凝土粘结层呈叠层结构。
The micro mechanism of new old concrete bond is analyzed firstly, and the new old concrete is considered as a kind of layered composite material.
试验结果表明，新老混凝土粘结断裂性能明显低于新混凝土整体试件的断裂性能。
The test results show that, the fracture properties of adherence of new and old concrete are evidence lower than the new concrete itself.
新老混凝土粘结问题的研究，对混凝土结构的修补和加固具有重要的理论和实际意义。
The research on adherence of young on old concrete has important theoretical and practical meanings for the repair and strengthening of concrete structures.
总结了新老混凝土粘结面粗糙度处理及评定方法，阐述了沟槽法处理老混凝土表面的优越性。
The treating methods for the interfacial roughness of new to old concrete are summarized, and the advantages of cutting groove method are given.
试验探讨了KH- 570硅烷偶联剂溶液浓度对新老混凝土粘结界面层拉拔强度的影响。
The influence of concentration of KH-570silane coupling agent solution to the pull-off bonding strength of concrete at the new-to-old interfacial layer was studied through experiment.
酸洗和改性界面剂措施共同使用使新老混凝土修补界面层微细观结构全面改善，粘结强度显著提高。
Two methodsbeing used together could improve microstructure of new and old concrete repairedinterface layer fully, leading to a significantly increase of bond strength.
通过剪切试验研究，得出了不同界面剂对新老混凝土粘结剪切性能的影响规律，并进行了双因素方差分析。
By shear testing investigation, the influencing laws of different interfacial agents on new old concrete bonding shear property are obtained and the double factors variance analysis is presented.
为了解预应力钢绞线张拉顺序对新老混凝土组合梁力学性能的影响，进行了双T形截面新老混凝土组合梁试验研究。
The old and new concrete of composite beam with double T-section was tested to investigate the effect of tension sequence of prestressing tendon on mechanical behavior of composite beam.
因此，本文研究的是加强新老混凝土结合，弥补粘结力不足的一种新方法，即采用机械连接件将新老混凝土结合在一起的方法。
Thus, this paper bring forward a young method to make up the lack of felt capacity-use mechanical joint element to link young and old concrete.
本文就大坝加高的结构设计中涉及的加高型式、断面设计、材料分区、新老混凝土结合面的型式等几个关键技术问题进行了探讨。
Several problems about cross-section design are to be solved according to statics characters, structure requirements, performance conditions and the requirement of anti-slid stability.
采用ANSYS非线性模块，同时考虑工作过程中大变形、接触等多种非线性因素，对新老混凝土粘结试件和整体试件的复合受力进行数值模拟。
New on old concrete adhesive specimen and whole specimen are done by nonlinear module in ANSYS in which large deformation and contact are simultaneously considered.
在新老混凝土粘结面断裂性能试验的基础上，建立了新老混凝土粘结面断裂破坏模式，分析讨论了界面层特性及界面微裂缝扩展对新老混凝土粘结面断裂性能的影响。
Based on the adhesive fracture test results of new and old concrete of the authors, a toughness model of adhesive interface of new and old concrete is put forward.
在自密实混凝土与老混凝土约束收缩试验的基础上，本文采用大型有限元软件ABAQUS进行了新老混凝土粘结的约束收缩模拟，并与试验结果进行比较，以验证有限元模型的可行性。
Based on the test results of adherence of self-compacting concrete to old concrete, the restrained shrinkage of adhesion between new and old concrete is simulated by finite element program ABAQUS.
并对修补混凝土的抗折、抗压、新老界面粘结强度以及抗冻性等进行了试验研究。
Bending strength, compressive strength, interfacial bond strength and frost-resistance are also studied and analyzed.
并对修补混凝土的抗折、抗压、新老界面粘结强度以及抗冻性等进行了试验研究。
Bending strength, compressive strength, interfacial bond strength and frost-resistance are also studied and analyzed.
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