集中荷载下超高强度梁剪压破坏研究  

EXPERIMENTAL STUDY ON UITRAHIGH STRENGTH CONCRETE RC BEAMS WITHOUT STIRRUPS IN SHEAR COMPRESSION FAILURE BY CONCENTRATED LOADS

作　　者：王卫仑[1] 邢锋[1] 

机构地区：[1]深圳大学深圳市土木工程耐久性重点实验室,深圳518060

出　　处：《低温建筑技术》2006年第4期7-9,共3页Low Temperature Architecture Technology

基　　金：深圳市科技计划项目(200438)

摘　　要：通过4组超高强度混凝土梁剪切试验,考察各主要因子对剪压破坏梁抗剪强度的影响。结果表明,在超高强度区域,目前的规范式对混凝土强度及剪跨比影响的评价是合理的,然而,梁有效高度及受拉钢筋配筋率对抗剪强度有很明显的影响,不考虑这些因素会使计算结果偏于不安全且计算结果有较大的变异系数。Study on shear compression failure of RC beams without stirrups was carried out by 4 series of ultrahigh strength specimens to estimate the influence of each design parameter separately. The results indicate the GB design equation is reasonable in shear span ratio and concrete compressive strength for ultrahigh strength beams. On the other hand, the calculated results with lager COV should be unsafe by GB equation because of not taking the significant effect of the effective depth and the tensile reinforcement ratio into account.

关 键 词：超高强度混凝土 无腹筋梁 剪压破坏 剪切强度公式 

分 类 号：TU392[建筑科学—结构工程]