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首页> 外文会议>SP-228; International Symposium on Utilization of High-Strength/High-Performance Concrete vol.1; 20050620-24; Washington,DC(US) >Shear Behavior of HPC Bulb-Tee Girders
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Shear Behavior of HPC Bulb-Tee Girders

机译：HPC灯泡形三通梁的剪力行为

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摘要

Three 96-ft (29.3-m) long, 72-in. (1.83-m) deep, pretensioned bulb-tee girders were tested to evaluate behavior under static shear loadings. The three girders had a design concrete compressive strength of 10,000 psi (69.0 MPa) and incorporated 0.6-in. (15.2mm) diameter, Grade 270, low relaxation prestressing strands. One of the girders was designed based on the AASHTO Standard Specifications for Highway Bridges and the other two were designed based on the AASHTO LRFD Bridge Design Specifications. The sheardesigns incorporated the use of eitherwelded wire fabric or conventional bars for reinforcement. Priorto testing, a 10-ft (3.05m) wide reinforced concrete deck slab was added to each girder and a fatigue test was performed. After the fatigue test, each girder was cut in half and both ends were tested to evaluate static shear strength performance. Measured strengths consistently exceeded the design strengths calculated by both AASHTO design approaches using both design and measured material properties.
机译：3个96英尺（29.3米）长，72英寸长。测试了（1.83-m）深的预张紧的T型梁，以评估在静态剪力作用下的性能。这三个大梁的设计混凝土抗压强度为10,000 psi（69.0 MPa），掺入量为0.6英寸。 （15.2mm）直径，等级270，低松弛预应力绞线。其中一个大梁是根据AASHTO公路桥梁标准规范设计的，另外两个是根据AASHTO LRFD桥梁设计规范设计的。剪力设计采用了焊接金属丝网或传统钢筋进行加固。在测试之前，将10英尺（3.05m）宽的钢筋混凝土甲板平板添加到每个大梁中，并进行了疲劳测试。疲劳测试后，将每个大梁切成两半，并测试两端以评估静态抗剪强度性能。测量的强度始终超过使用设计和测量的材料特性的两种AASHTO设计方法计算出的设计强度。

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