884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(北京交通大學(xué)土建學(xué)院  100044)

［提要］  目前對活性粉末混凝土梁的正截面抗裂性能尚缺乏系統(tǒng)的研究，鋼纖維加入后對受拉區(qū)混凝土塑性變形的影響也未做較為深入的探討。為此，在試驗(yàn)研究的基礎(chǔ)上建立了活性粉末混凝土梁的正截面抗裂計(jì)算模型，結(jié)合試驗(yàn)數(shù)據(jù)和有限元分析結(jié)果，提出活性粉末混凝土梁正截面抗裂計(jì)算公式。

［關(guān)鍵詞］  活性粉末混凝土  正截面抗裂  塑性影響系數(shù)

Calculating Method of Crackresistant Capacity of Reactive Powder Concrete Beams/Wan Jianming, Gao Ri (School of Civil & Architecture Engineering, Beijing Jiaotong University，Beijing 100044,China)

Abstract:The crack resistant capacity performance of RPC beam hadn"t been researched systematically at present，and the effects of the steel fiber added on the plastic deformation of the RPC tension region hadn"t been studied deeply.Based on the theoretical and finite element analysis, the model of the crack resistant capacity of reactive powder concrete beams is set up，and the calculating formula are presented.The results from the method coincide well with those from the tests.

Keywords:reactive powder concrete; crack resistant capacity; plastic influence coefficient