新型粉煤灰泡沫混凝土墙体轴心受压性能试验研究
Experimental study on axial compression performance of new type fly ash foam concrete wall
郝贠洪 1邬卓轩 2秦立达 2孙浩 2慈天义2
作者信息
- 1. 内蒙古工业大学土木工程学院,呼和浩特 010051;内蒙古自治区土木工程结构与力学重点实验室,呼和浩特 010051;内蒙古自治区建筑检测鉴定与安全评估工程技术研究中心,呼和浩特 010051
- 2. 内蒙古工业大学土木工程学院,呼和浩特 010051
- 折叠
摘要
利用工业固废粉煤灰制备节能与承重一体的新型墙体,对无冷弯薄壁C型钢外包内置钢丝网片固废粉煤灰泡沫混凝土墙体FW、外包 1mm厚冷弯薄壁C型钢内置钢丝网片固废粉煤灰泡沫混凝土墙体CW1、外包2mm厚冷弯薄壁C型钢内置钢丝网片固废粉煤灰泡沫混凝土墙体CW2 分别在轴压作用下的破坏形态、荷载-位移曲线及墙体极限承载力进行试验研究.研究结果表明:从破坏形态度角度,FW、CW1 及CW2 在破坏时,冷拔钢丝、冷弯薄壁C型钢发生屈服,泡沫混凝土破裂;FW大面积泡沫混凝土挤压破碎剥落,破坏严重;CW2 破坏时完整性优于FW、CW1.从变形角度,CW1、CW2 外包的C型钢能够对墙体内部的泡沫混凝土起到约束作用,墙体的刚度得到提升.从承载力角度,CW2 较CW1 提升了 17.4%,较FW提升了 23.7%.对墙体的轴压承载力进行理论计算,与墙体轴心受压试验的实测值相比,二者误差在 10%以内且小于实测值,满足国家现行规范、行业技术标准相关要求.
Abstract
Industrial solid waste fly ash was used to prepare a new type of wall with energy saving and load-bearing integration.The failure mode,load-displacement curve and ultimate bearing capacity of cold-formed thin-walled C-section steel wrapped with built-in steel wire mesh solid waste fly ash foam concrete wall FW,1mm thick cold-formed thin-walled C-section steel wrapped with built-in steel wire mesh solid waste fly ash foam concrete wall CW1 and 2mm thick cold-formed thin-walled C-section steel wrapped with built-in steel wire mesh solid waste fly ash foam concrete wall CW2 under axial compression were studied.The results show that:from the perspective of failure form attitude,when FW,CW1 and CW2 are destroyed,cold drawn steel wire and cold-formed thin-walled C-shaped steel yield and foam concrete rupture;FW large area foam concrete crushing spalling,serious damage;the integrity of CW2 destroyed is better than that of FW and CW1.From the perspective of deformation,the C-shaped steel outsourced by CW1 and CW2 can restrain the foam concrete inside the wall,and the stiffness of the wall is improved.From the perspective of bearing capacity,CW2 is 17.4%higher than CW1 and 23.7%higher than FW.The theoretical calculation of the axial bearing capacity of the wall was carried out.Compared with the measured value of the wall's axial compression test,the error between the two is within 10%and less than the measured value,and can meet the relevant requirements of current national norms and industry technical standards.
关键词
泡沫混凝土墙体/冷弯薄壁C型钢/冷拔钢丝网片/轴心受压性能/极限承载力Key words
foam concrete wall/cold-formed thin-walled C steel/cold drawn steel wire mesh/axial compression performance/ultimate bearing capacity引用本文复制引用
基金项目
国家自然科学基金(51468049)
国家自然科学基金(11862022)
内蒙古自治区科学基金(2018MS05047)
内蒙古自治区科技计划(2020GG0014)
出版年
2024
NETL
NSTL
万方数据