This chapter addresses the technical challenges associated with assembled monolithic precast concrete shear walls in China, proposing the Emulative Hybrid Assembled Precast Concrete Shear Wall (EHSW) as a potential solution. The EHSW integrates advanced techniques such as post-tensioned unbonded prestressing, local unbonded technology for grouted rebars, and lapping closed stirrups to enhance structural performance. Key parameters influencing the seismic behavior of EHSW, including the section area of unbonded prestressed tendons, the initial effective stress of unbonded prestressed tendons, the local unbonded length of grouted rebar, and the axial compression ratio, are thoroughly analyzed. The chapter further details the anchorage and tensioning devices for unbonded prestressed tendons, the local unbonded construction of grouted rebars, and the construction methodology for lapping closed stirrups. These innovations aim to improve cracking resistance, reduce concentrated damage, and enhance force transmission, thereby offering a promising direction for the further development of precast concrete shear walls in China.

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Emulative Hybrid Assembled Precast Concrete Shear Wall

  • Zhangfeng Zhu,
  • Zhengxing Guo,
  • Lei Tang

摘要

This chapter addresses the technical challenges associated with assembled monolithic precast concrete shear walls in China, proposing the Emulative Hybrid Assembled Precast Concrete Shear Wall (EHSW) as a potential solution. The EHSW integrates advanced techniques such as post-tensioned unbonded prestressing, local unbonded technology for grouted rebars, and lapping closed stirrups to enhance structural performance. Key parameters influencing the seismic behavior of EHSW, including the section area of unbonded prestressed tendons, the initial effective stress of unbonded prestressed tendons, the local unbonded length of grouted rebar, and the axial compression ratio, are thoroughly analyzed. The chapter further details the anchorage and tensioning devices for unbonded prestressed tendons, the local unbonded construction of grouted rebars, and the construction methodology for lapping closed stirrups. These innovations aim to improve cracking resistance, reduce concentrated damage, and enhance force transmission, thereby offering a promising direction for the further development of precast concrete shear walls in China.