钢板-混凝土组合连梁受剪承载力概率模型分析  

Probabilistic Model Analysis for Shear Capacity of Plate-Reinforced Composite Coupling Beams

作　　者：吕贝贝 谭朝明 刘喜[2] LÜBeibei;TAN Zhaoming;LIU Xi(School of Architecture and Geomatics Engineering,Shanxi Datong University,Datong 037003,China;School of Civil Engineering,Chang’an University,Xi’an 710061,China)

机构地区：[1]山西大同大学建筑与测绘工程学院,大同037003 [2]长安大学建筑工程学院,西安710061

出　　处：《结构工程师》2020年第6期44-52,共9页Structural Engineers

基　　金：国家自然科学基金青年项目(51708036);陕西省自然科学基金项目(2017JQ5092);山西大同大学青年基金资助项目(2018Q6)。

摘　　要：为分析钢板-混凝土组合(PRC)连梁受剪承载力,收集国内外37组PRC连梁试件抗剪试验数据作为样本信息,以中国规范(YB 9082—2006、JGJ 138—2016)、美国规范(ACI318-02和AISC(1999))以及英国规范(BS8110和BS5950)中关于PRC连梁受剪承载力计算的模型为基础,考虑跨高比ln/h、配板率ρp、配板特征值λp、纵筋配筋率ρs、钢板强度f(py)、混凝土强度f(cu)、钢板截面尺寸tw/hw以及连梁截面尺寸b/h等影响参数为修正项,应用贝叶斯统计推断理论对各规范模型进行修正,建议了PRC连梁斜截面受剪承载力基于各国规范模型的概率计算模型。研究表明:四个规范计算模型对PRC连梁的跨高比ln/h、配板率ρp以及钢板截面尺寸tw/hw的影响程度考虑不够,均需保留在概率计算模型中;另YB 9082—2006模型对纵筋配筋率ρs考虑不够,也需保留;且概率模型计算值与试验值吻合较好,该建议模型能合理地进行PRC连梁受剪承载力的计算。To analyze the shear bearing capacity of plate-reinforced composite(PRC)coupling beam,collecting 37 shear test results of PRC coupling beam at home and abroad as sample information,based on the shear bearing capacity calculation models from Chinese codes(YB 9082—2006、JGJ 138—2016)and American codes(ACI318-02 and AISC(1999))and British codes(ACI318-02 and AISC(1999)),considering influencing parameters,for example span-depth ratio ln/h,plate ratio pp,characteristic value of plate Ap,longitudinal reinforcement ratioρs,strength of steel plate fpy,strength of concrete fcu,section size of plate tw/hw and section size of beam b/h,as the correction terms,probabilistic calculation models were suggested by using Bayesian statistics theory.It shows that four code calculation models consider the influence of the spandepth ratio ln/h,plate ratioρp and section size of plate tw/hw rarely,which need to be retained in the probabilistic models.Besides,calculation model from YB 9082—2006 considers the influence of longitudinal reinforcement ratioρs rarely,which also need to be retained.Furthermore good agreement between the experimental results and predicted results of probabilistic models was achieved.Since the suggested probabilistic models can be used for the prediction for the shear capacity of PRC coupling beams.

关 键 词：钢板-混凝土组合连梁 受剪承载力 贝叶斯理论 影响参数 

分 类 号：TU398.9[建筑科学—结构工程]