摘要
对比6根不同预应力度的部分外包组合简支梁和2根无预应力普通部分外包简支梁受弯裂缝分布及发展,研究最大裂缝宽度在不同预应力大小作用下的变化特性。结果表明,预应力能抑制裂缝的产生并使其开展减缓;随预应力增加,主裂缝宽度随荷载的增长速度却有明显减慢的迹象。在试验研究基础上,对最大裂缝宽度计算公式进行参数修正,推导了预应力部分外包组合简支梁在不同预应力下最大裂缝宽度计算公式,计算值与试验值吻合度较高。
Comparative analysis of six different prestressed should be efforts to outsource part of the composite beams and 2 without common prestressed partial outsourcing simply supported beam flexural crack distribution and development, the maximum crack width under different prestress effects the variation characteristics of. The results shown that the prestress can restrain the crack and make it develop slowly. With the increase of prestress, the main signs of crack width with the rate of load growth had slowed down significantly. This paper on the basis of experimental research on and on the maximum crack width calculation formula of parameter modification is partially prestressed encased composite beam under different prestressed maximum crack width formula calculated value is in agreement with the test value is higher.
作者
张鹏
张伟学
邓宇
钟卿瑜
ZHANG Peng;ZHANG Wei-xue;DENG Yu;ZHONG Qing-yu(Department of Civil Engineering and Architecture,Guangxi University of Science and Technology,545006,Liuzhou,Guangxi,China)
出处
《建筑技术》
2019年第6期744-747,共4页
Architecture Technology
基金
国家自然科学基金项目(51168006)
广西高校科学技术研究重点项目(ZD2014076)
广西自然科学基金项目(2015GXNSFAA139263)
关键词
预应力
部分外包
简支梁
张拉控制力
裂缝宽度
prestress
partial outsourcing
simply beam
tension control stress
crack width
