vertical prestress

Study on the vertical prestress loss of the prestress concrete box girder bridge web;

预应力混凝土箱梁桥腹板竖向预应力损失研究

Test of vertical prestress loss and analysis research on it;

竖向预应力损失的实测与分析研究

The vertical prestress applied to webs of concrete box girder is studied.

对混凝土箱梁腹板竖向预应力进行研究。

In this paper,starting from analysis of the sensitivity of slant box beam web cracks to vertical pre-stress,the dynamic mechanism of the effective reduction in main web pulling stress by vertical pre-stress is explained.

从箱梁腹板斜裂缝对竖向预应力的敏感性分析出发,阐明竖向预应力有效削减腹板主拉应力的力学机理,探讨现阶段国内外竖向预应力设置方法及其优缺点,提出用碳纤维力筋CFRP取代传统的精轧螺纹钢建立有效预应力的新方法,尝试设计其专用锚具及施工工艺。

The distribution of ring pre-stress, anchoring steel beam and pre-stress, vertical pre-stress of the anchoring zone of the main tower in Songhuajiang cable stayed bridge are introduced and the corresponding construction technologies are clarified in the paper.

介绍哈尔滨绕城公路松花江斜拉桥主塔锚固区环向预应力、锚固钢横梁及预应力、竖向预应力的布置情况及有关的预应力施工工艺。

The vertical pre-stressed reinforcement installed in the pre-stressed concrete continuous (rigid frame) box beam bridge is to decrease and control the main tension stress of the web and to prevent the creaking.

预应力混凝土连续(刚构)箱梁桥设置竖向预应力筋是为了减少和控制腹板主拉应力、防止开裂,然而在设置了竖向预应力后。

Based on the long-term field measurement of vertical prestress losses in the box girder of a long-span PC continuous bridge,a detailed analysis of the loss of the vertical prestressing is conducted.

基于某大跨预应力混凝土连续箱梁桥腹板竖向预应力的现场长期测试结果,对箱梁竖向预应力的各种损失进行了分析。

According to existing norms,the ratio of the vertical prestress loss to different length of the vertical prestressing bars is analyzed.

竖向预应力筋在连续刚构桥中主要起控制腹板主拉应力的作用,根据现行规范分析了不同长度竖向预应力筋的损失比例,提出了减小竖向预应力损失的几种措施;针对目前设计中采用的滞后张拉竖向预应力筋的方法,开展了3种滞后张拉竖向预应力筋方式对连续刚构桥受力的影响分析,在此基础上提出了竖向预应力合理张拉时间的建议;建立了箱梁腹板的细部有限元模型,详细地分析了腹板在单根竖向预应力筋作用下的应力分布情况和腹板上缘出现拉应力的原因,据此提出避免上缘拉应力出现的构造措施。

The vertical tendon had to be prestressed twice to ensure effective prestressing.

竖向预应力应两次张拉以保证有效预应力。

Research on the Prestress Losses in the Vertical Pre-stressed of PC Concrete Box Girder Bridge;

预应力混凝土箱梁桥竖向预应力损失的研究

Vertical Prestressing Construction Technology of PC Box-girder Bridge

PC箱梁桥竖向预应力施工技术探讨

Vertical Prestressed Concrete Box-girder Bridge Analysis of Field Test

混凝土箱梁桥竖向预应力现场测试分析

Monitoring and Analysis of Causes of Vertical Prestress Loss of Finish Rolling Thread Steel

精轧螺纹钢竖向预应力损失监测及其原因分析

Calculation of the Compressed Stress in Box Beam Web by Vertical Prestressing Forces in Consideration of Stress Diffusion

考虑竖向预应力扩散影响的箱梁腹板预压应力计算

Influnce of Vertical Prestressed Steel Anchor Backing Plate Installated Dip on Prestressed Loss;

竖向预应力钢筋锚垫板安装倾角对预应力损失的影响

Research on Technology of Twice Tension Applied in Web's Vertical Prestress of Box Beam

二次张拉钢绞线技术应用于箱梁腹板竖向预应力的研究

Calculation and Measure of Web Vertical Stress Field Using Low Retracting Prestressed Anchorage

低回缩预应力钢绞线锚具应用于腹板竖向预应力的应力场的计算与实测

Vertical Prestressing Test and Web Diagonal Cracks Control of PC Box-Girder Bridges;

PC箱梁桥竖向预应力测试及腹板斜裂缝控制研究

EXPERIMENTAL RESEARCH ON VERTICAL BEARING CAPACITY OF THE PRESTRESSED CONCRETE PIPE PILE WITH TOOTH PITCH

预应力齿面管桩竖向承载力试验研究

Research on the Vertical Joint of PC Concrete Box Girder Bridge

悬浇预应力箱梁桥竖向接缝试验研究

STUDY ON PREDICATION OF EFFECTIVE PRESTRESS FOR PC BEAM BASED ON STATIC PERFORMANCE

基于竖向位移测试的PC梁有效预应力预测研究

Research on Vertical Bearing Capacity of Prestressed Concrete Pipe Pile in Sand Soil;

预应力混凝土管桩在砂土中竖向承载力的研究

Fuzzy Probability Analysis on Pre-Stressed Concrete Tube Piles;

预应力管桩竖向承载力模糊可靠性分析研究

Research on Vertical Bearing Capacity of Prestressed Concrete Pipe Pile in Yangzhou City

扬州地区预应力混凝土管桩竖向承载力研究

Application of Pre-stressed Anchor Cable in Vertical Static Loading Test of Single Pile

预应力锚索在单桩竖向静载试验中的应用

Analysis of the Behaviour of Subassemblage and Prestressed Concrete Frames under Vertical Loads;

预压装配式预应力混凝土框架竖向荷载作用下的整体性分析