灌孔配筋混凝土模壳砌块基础竖向承载性能试验研究与分析  

Experimental study and analysis of vertical load-bearing performance of hollow block foundation with grout concrete and reinforced

作　　者：尹烁 慈梦尧 王少杰[1] 王旭 刘佩玺 郑宝磊 YIN Shuo;CI Mengyao;WANG Shaojie;WANG Xu;LIU Peixi;ZHENG Baolei(College of Water Conservancy and Civil Engineering,Shandong Agricultural University,Tai′an 271018,China;Jiangsu Wanrong Construction Technology Co.,Ltd.,Xuzhou 221000,China;Jining Water Conservancy Development Center,Jining 272100,China;Shandong Jianzhu University Design Group Co.,Ltd.,Jinan 250013,China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]江苏万融工程科技有限公司,江苏徐州221000 [3]济宁市水利事业发展中心,山东济宁272100 [4]山东建筑大学设计集团有限公司,山东济南250013

出　　处：《混凝土》2024年第5期155-159,165,共6页Concrete

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2017YFE0195300);2021年山东省研究生教育教学改革研究项目;山东省自然科学基金(ZR2017BEE022)。

摘　　要：灌孔配筋混凝土模壳砌块基础具有免支模、整体性好、易施工等优点,为了研究其竖向承载性能和失效破坏模式,通过试验和数值分析研究了配筋方式、试件高度、侧向土压力等因素的影响。结果表明:模壳砌块参与灌孔配筋混凝土模壳砌块基础受力,其在失效破坏时外围剥落、内部横肋可被灌孔混凝土有效约束;内置箍筋能显著提高试件开裂荷载并改善变形性能,但对竖向极限承载力无显著影响,失效时箍筋呈受压屈曲灯笼状外鼓;试件高度增加即高厚比增加,竖向极限承载力小幅下降(最大降幅5.35%);侧向土压力对无箍筋试验组的竖向承载性能无显著影响,但其与内置箍筋会形成双重约束作用并显著改善内置箍筋基础的竖向承载性能。GB/T 50003—2011《砌体结构设计规范》适用于灌孔配筋混凝土模壳砌块基础竖向极限承载力的计算,建立的有限元模型分析结果可靠,可为工程应用或同类研究提供参考。Hollow block foundation with grout concrete and reinforced(HBF)has the advantages of no formwork,good integrity,and easy construction.To study HBF's vertical load-bearing performance and failure damage mode,the effects of the reinforcement method,specimen height,lateral soil pressure,and other factors were investigated through experimental studies and numerical analysis.The results show that the hollow block is involved in the foundation bearing of the HBF,during failure the outer ribs fall off and the inner ribs can be effectively restrained by the concrete.The stirrup can significantly improve the specimen cracking bearing capacity and deformation performance,but it has no significant effect on vertical ultimate bearing capacity,when the stirrup fails appears lantern-shaped outer drum in compression buckling.With the ratio ofheight to thickness increased,and the vertical ultimate bearing capacity slightly decreased(the maximum reduction was 5.35%).The lateral soil pressure has no significant effect on the vertical bearing capacity of the test group without stirrup,it has a double constraint effect with the inner stirrup can significantly improves the vertical bearing performance of the HBF."Code for design of masonry structures"(GB/T 50003—2011)suitable for the calculation ofHBF vertical ultimate bearing capacity,the analytical results ofthe established finite element model are reliable,can provide a reference for engineering applications or similar research.

关 键 词：灌孔配筋砌块砌体 模壳砌块 配筋砌体 条形基础 双重约束 

分 类 号：TU528.7[建筑科学—建筑技术科学]