<p>An innovative steel reinforced concrete frame with replaceable high damping concrete wall (SRC-HDCW) is proposed. The HDCW contains a polyvinyl alcohol fiber-reinforced rubber concrete wall panel and ten fuses made by low yielding point (LYP) steel. Two SRC-HDCWs are designed for the quasi-static cyclic test, in which the one is directly loaded to overall failure to verify its seismic performance. The other one is repaired by installing a new set of HDCW when it reaches the limit value of elastic–plastic story drift. The earthquake-resilient behavior is demonstrated through the rehabilitation in bearing capacity and stiffness. The failure mode, yielding pattern, hysteretic characteristics and ductility are analyzed. According to the features of obtained skeleton curve and hysteretic loop, a restoring force model based on quadri-linear skeleton curve as well as the corresponding hysteretic rule is proposed. The shear capacity and the initial stiffness of this hybrid structure are deduced. The relationship between initial stiffness and its degeneration at loading (unloading) path is fitted, in which the pinching behavior is considered. The predicted hysteretic curves are found to agree closely with those of the experimental specimens.</p>

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Study on seismic behavior and restoring force model for steel reinforced concrete frame with replaceable high damping concrete wall

  • Yunfeng Xiao,
  • Xiaodong Wen,
  • Lei Zeng,
  • Qing Lyu,
  • Yanhua Liu

摘要

An innovative steel reinforced concrete frame with replaceable high damping concrete wall (SRC-HDCW) is proposed. The HDCW contains a polyvinyl alcohol fiber-reinforced rubber concrete wall panel and ten fuses made by low yielding point (LYP) steel. Two SRC-HDCWs are designed for the quasi-static cyclic test, in which the one is directly loaded to overall failure to verify its seismic performance. The other one is repaired by installing a new set of HDCW when it reaches the limit value of elastic–plastic story drift. The earthquake-resilient behavior is demonstrated through the rehabilitation in bearing capacity and stiffness. The failure mode, yielding pattern, hysteretic characteristics and ductility are analyzed. According to the features of obtained skeleton curve and hysteretic loop, a restoring force model based on quadri-linear skeleton curve as well as the corresponding hysteretic rule is proposed. The shear capacity and the initial stiffness of this hybrid structure are deduced. The relationship between initial stiffness and its degeneration at loading (unloading) path is fitted, in which the pinching behavior is considered. The predicted hysteretic curves are found to agree closely with those of the experimental specimens.