【摘要】 为了研究混凝土剪力墙边缘约束构件对其抗震性能的影响,进行了在相同高宽比、轴压比、混凝土强度和竖向配筋下,考虑不同边缘约束配箍参数,即边缘约束区长度和配箍特征值共5片剪力墙的低周反复荷载试验。对试验结果进行了分析,主要内容包括:破坏形态、极限位移及极限位移角、骨架曲线、滞回曲线和承载力。分析表明边缘约束配箍参数对其抗震性能影响显著,合适的边缘约束区长度和适当提高配箍特征值是改善其抗震性能的有效措施。在对试验结果分析的基础上,进一步推导了考虑剪力墙截面应变协调的情况下,RC剪力墙极限位移角在高宽比、轴压比、边缘约束配箍参数、混凝土强度和竖向分布配筋参数影响下的计算式,并通过对本课题组同一批15个试件试验结果统计得到了相关参数,给出了弯剪形混凝土剪力墙边缘约束区长度和最小配箍特征值的建议设计方法。最后用相关文献中试验数据对文中推导的极限位移角计算方法进行了验证。更多还原

【Abstract】 To find the influence of the stirrup parameter and confined boundary zone on the RC shear walls seismic performance,five pieces of RC shear walls were made and tested under reversed cyclic quasi-static loading.The test results were also analyzed.The analysis includes the damage mode,limit drift ratios,skeleton curves,hysteretic curves and the bearing capacity.They indicate that the boundary element can influence the shear walls seismic performance remarkably,reasonably setting stirrup parameter and confined boundary zone can improve the seismic capacity.By use of coefficient of section’s coordinated strain,limit drift ratios calculation formula was gived with the shear-span ratio,axial compression ratio,stirrup parameter,concrete strength and vertical distribution reinforcements.Test results from 15 specimens were used for the formula.At last design methods of stirrup parameter and confined boundary zone were gived and the formula of limit drift ratios was verified by other testing results from references.更多还原