为研究中间设置保温层复合墙体轴压力学性能,通过应用5 000 k N加载试验系统和静态应变测量系统,对中间设置保温层复合墙体与普通混凝土墙体在轴压作用下的破坏形态、荷载-位移曲线、钢筋和混凝土变形及墙体极限承载能力进行对比试验研...为研究中间设置保温层复合墙体轴压力学性能,通过应用5 000 k N加载试验系统和静态应变测量系统,对中间设置保温层复合墙体与普通混凝土墙体在轴压作用下的破坏形态、荷载-位移曲线、钢筋和混凝土变形及墙体极限承载能力进行对比试验研究。研究结果表明:中间设置保温层复合墙体开裂裂缝分布较均匀,普通混凝土墙体出现较为明显的通长裂缝;在相同配筋率下,复合墙体的承载力高于普通混凝土墙体;从变形角度,复合墙体能充分利用墙体的整体性,提高混凝土和钢筋的利用率。展开更多
The axial bearing capacity of prefabricated composite walls composed of inner and outer concrete wythes,expandable polystyrene(EPS)boards and steel sleeve connectors is investigated.An experimental study on the axial ...The axial bearing capacity of prefabricated composite walls composed of inner and outer concrete wythes,expandable polystyrene(EPS)boards and steel sleeve connectors is investigated.An experimental study on the axial bearing capacity of four prefabricated composite walls after fire treatment is carried out.Two of the prefabricated composite walls are normal-temperature specimens,and the others are treated with fire.The damage modes and crack development are observed,and the axial bearing capacity,lateral deformation of the specimens,and the concrete and reinforcing bar strain are tested.The results show that the ultimate bearing capacity of specimens after a fire is less than that of normal-temperature specimens;when the insulation board thicknesses are 40 mm and 60 mm,the decrease amplitudes are 20.8%and 16.8%,respectively.The maximum lateral deformation of specimens after a fire is greater than that of normal-temperature specimens,and under the same level of load,the lateral deformation increases as the insulation board thickness increases.Moreover,the strain values of the concrete and reinforcing bars of specimens after a fire are greater than those of normal-temperature specimens,and the strain values increase as the thickness of insulation board increases.展开更多
文摘为研究中间设置保温层复合墙体轴压力学性能,通过应用5 000 k N加载试验系统和静态应变测量系统,对中间设置保温层复合墙体与普通混凝土墙体在轴压作用下的破坏形态、荷载-位移曲线、钢筋和混凝土变形及墙体极限承载能力进行对比试验研究。研究结果表明:中间设置保温层复合墙体开裂裂缝分布较均匀,普通混凝土墙体出现较为明显的通长裂缝;在相同配筋率下,复合墙体的承载力高于普通混凝土墙体;从变形角度,复合墙体能充分利用墙体的整体性,提高混凝土和钢筋的利用率。
基金The National Key Research and Development Program of China(No.2016YFC0701703)the Natural Science Foundation of Higher Education Institutions of Jiangsu Province(No.2016TM045J)the Scientific Innovation Research of Graduate Students in Jiangsu Province(No.KYLX_0151)
文摘The axial bearing capacity of prefabricated composite walls composed of inner and outer concrete wythes,expandable polystyrene(EPS)boards and steel sleeve connectors is investigated.An experimental study on the axial bearing capacity of four prefabricated composite walls after fire treatment is carried out.Two of the prefabricated composite walls are normal-temperature specimens,and the others are treated with fire.The damage modes and crack development are observed,and the axial bearing capacity,lateral deformation of the specimens,and the concrete and reinforcing bar strain are tested.The results show that the ultimate bearing capacity of specimens after a fire is less than that of normal-temperature specimens;when the insulation board thicknesses are 40 mm and 60 mm,the decrease amplitudes are 20.8%and 16.8%,respectively.The maximum lateral deformation of specimens after a fire is greater than that of normal-temperature specimens,and under the same level of load,the lateral deformation increases as the insulation board thickness increases.Moreover,the strain values of the concrete and reinforcing bars of specimens after a fire are greater than those of normal-temperature specimens,and the strain values increase as the thickness of insulation board increases.