预应力混凝土梁中通常采用C50混凝土。
给出了无粘结预应力混凝土梁强度和受力性能的分析结果。
The analytical results for strength and behavior of unbonded prestressed concrete beams were presented.
完成了16根无粘结预应力混凝土梁的低周反复荷载试验。
Specimens of 16 unbonded prestressed concrete beams under low cyclic loading were tested.
无粘结预应力混凝土梁的分析要比有粘结混凝土梁复杂得多。
Analysis of beams prestressed with unbonded tendon is much more complicated than that of bonded concrete beams.
本文探讨重复荷载对部分预应力混凝土梁疲劳抗剪强度的影响。
The effects of repeated loading on the fatigue shear strength of partially prestressed concrete beams are studied.
建立了基于静动力测试的既有预应力混凝土梁桥的承载力评估方法。
A static and dynamic-based evaluation procedure of load-carrying capacity for existing prestressed concrete girder bridges is proposed.
对国内外体外预应力混凝土梁的研究成果进行了较为系统的分析总结。
The existing research achievements, at home and abroad, on external prestressed concrete beams are systematically analyzed in this paper.
后张法预应力混凝土梁板在张拉施工过程中，经常会出现一些施工病害。
Some diseases usually appear in the tension construction of post-tensioning prestressed concrete beam slabs.
部分预应力混凝土梁中的非预应力钢筋在反复运行荷载作用下承受交变应力。
The non—prestressed steel bars in ppc beams endure alternate stress under the repeated service loading.
波纹钢腹板预应力混凝土梁桥是对传统的预应力混凝土梁桥的一次重大改进。
The prestressed concrete beam bridge with corrugated web has greatly improved the traditional prestressed concrete beam bridge.
带过渡区的混凝土及预应力混凝土梁，它涉及一种土木工程中的混凝土结构。
The invention relates to the concrete and pre-stress concrete beam with transition area, which provides a concrete structure of civil engineering.
以实际工程为背景，针对预应力混凝土梁cfrp加固的抗弯受力性能进行了研究。
Based on a practical building project, the bending resistance properties of adopting CFRP strengthening method are studied for prestress concrete beam.
在试验和理论分析的墓础上，提出了无粘结部分预应力混凝土梁裂缝宽度的计算方法。
According to the test results and theoretical analyses, a method of calculating the crack width of unbonded partially prestressed concrete beams is presented.
分析无粘结预应力混凝土梁桥的主要困难，在于构件的截面强度和构件整体变形耦合。
The main difficulty in analysis of unbonded prestressed concrete beam bridge is the coupling between the sectional strength of member and the whole structural deformation of member.
因此，本文就应用ANSYS软件对火灾下预应力混凝土梁板非线性分析进行了尝试。
So the paper attempts to analyze the nonlinear properties of prestressed concrete beams and slabs subjected to fires by ANSYS software.
从工程实例出发，分析了后张预应力混凝土梁锚下混凝土裂缝产生的原因和处理方法。
By the engineering example, the reason and the treatment method of the concrete crack under anchorage device of post-tensioned concrete beam are analyzed.
本文概要地介绍了允许出现裂缝的部分预应力混凝土梁斜截面疲劳性能的试验研究结果。
The test research results on fatigue behaviour of inclined section of crack-permitted partially prestressed concrete beams are briefly described in this paper.
使用荷载下无粘结部分预应力混凝土梁应力分析的主要困难，是如何确定无粘结预应力筋的应力。
The main difficulty of stress analysis of unbonded partially prestressed concrete beam is how to determine unbonded tendons stress.
根据两类极限状态的基本要求，建立了预应力混凝土梁截面设计的控制方程，提出了直接设计方法。
Based on the demands of two limit states, the design control equations of cross section for prestressed concrete beam are derived and the direct design method is presented.
计算部分预应力混凝土梁开裂后截面应力时，需求解中和轴高度的三次方程，使计算显得比较复杂。
It is rather complicated to compute the neutral axis in partially pre-stressed concrete beams after cracking, since we have to solve a cubic equation.
采用本文提出的挠度计算方法计算了各级荷载下开裂预应力混凝土梁的挠度，并与试验值进行对比。
Used the deflection calculation method proposed by the paper, calculated the deflection under various load of the cracked prestressed concrete beam, and compared with experimental value.
研究以碳纤维筋为无粘结预应力筋和环氧涂层钢筋为非预应力筋的部分预应力混凝土梁的受弯性能。
Based on the existing test results, the calculation method of the closing stresses and closing moments in partially prestressed concrete beams has been discussed.
详细计算了体外预应力混凝土梁中常用型号体外索的自振特性，介绍了铁路混凝土梁的实测自振频率。
Vibration characteristics of external tendons used on external prestressing concrete beams are detailedly calculated. Also the tested vibration characteristics of railway concrete beams are presented.
在详细分析了预应力度同梁的应力、位移、开裂的关系的基础上提出了部分预应力混凝土梁的设计方法。
Based on analyzing the relations of degree of pre-stress to stress, deflection and crack of concrete beam, a design method is pro-posed.
为配合青藏铁路工程应用，配制抗冻性高、强度较高、适合于青藏铁路预应力混凝土梁的高性能混凝土。
An experimental investigation was conducted to provide high-performance concrete, with high frost resistance and proper strength, to construction of precast elements of Bridges in Qing-Zang railway.
将留后浇带预应力混凝土梁模拟为弹性支座梁，研究了留后浇带预应力混凝土结构施工期间的力学性能。
The structures are simulated as a beam with elastic bearing, then a model is proposed for the analysis of prestressed concrete structures with a strip of post pouring concrete during construction.
工程设计实践中将无粘结预应力混凝土梁的安全贮备比有粘结预应力的计算结果提高15%有一定的合理性。
It seems reasonable in practice to increase the safety margin of unbonded members by 15% in comparison with the bonded prestressed concrete bending members.
阐述了体外预应力结构的概念与特性，分析了传统体外预应力混凝土梁桥建模方法——等效荷载法和荷载平衡法的缺点。
The shortcomings of the traditional modeling methods, the equivalent load method and the load balance method, in external pre-stressed concrete bridges were analyzed.
运营中的大跨径预应力混凝土梁桥箱梁普遍开裂，严重影响了桥梁结构的安全性和耐久性，造成了桥梁过早的失效和破坏。
The long-span prestressed concrete beam bridge is likely to craze in operation, which decreases the bridge's safety and durability and then leads to its structure's early failure and destruction.
运营中的大跨径预应力混凝土梁桥箱梁普遍开裂，严重影响了桥梁结构的安全性和耐久性，造成了桥梁过早的失效和破坏。
The long-span prestressed concrete beam bridge is likely to craze in operation, which decreases the bridge's safety and durability and then leads to its structure's early failure and destruction.
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