Experimental Research on In-Plane Mechanical Characteristics of Precast Concrete Diaphragm Connections with Two-Stage Energy Dissipation

LUO Weigang; SONG Jiangpeng; QI Pan; SI Hangbin; LIU Kai; LI Lanzhou; ZHAO Xingxin

doi:10.13204/j.gyjzG21121802

Volume 52 Issue 12

Dec. 2022

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LUO Weigang, SONG Jiangpeng, QI Pan, SI Hangbin, LIU Kai, LI Lanzhou, ZHAO Xingxin. Experimental Research on In-Plane Mechanical Characteristics of Precast Concrete Diaphragm Connections with Two-Stage Energy Dissipation[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 80-87,215. doi: 10.13204/j.gyjzG21121802

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Experimental Research on In-Plane Mechanical Characteristics of Precast Concrete Diaphragm Connections with Two-Stage Energy Dissipation

doi: 10.13204/j.gyjzG21121802

1. Western Center of Disaster Mitigation in Civil Engineering, Ministry of Education, Lanzhou 730050, China;
2. Gansu Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Lanzhou 730050, China;
3. College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Received Date: 2021-12-18
Available Online: 2023-03-22

Abstract

Abstract

In order to improve the seismic performance of precast concrete floor structures in different seismic intensity, based on the concept of performance-based seismic design, a new type of dry connectors which could be used for the connections of precast concrete diaphragms in site was proposed. It showed the characteristics of dual energy dissipation properties of friction and metals, and could meet the multi-level seismic performance requirements based on two-stage energy dissipation, referred to as friction-metal damper (FMD) connectors. In order to study the mechanical properties of FMD connectors in different stress states, six quasi-static tests of precast floor slabs equipped with FMD connectors under pure shear and tension-shear coupling force were conducted. The test results showed that the new type of dry connectors had stable hysteretic characteristics and energy dissipation capacity, showing a cooperative working mechanism of friction and metals, which could realize the objectives of multi-level seismic fortification, and could meet the requirements for fast recovery of structural functions after earthquakes.
- precast concrete diaphragm connection,
- dual energy dissipation mechanism,
- friction energy dissipation,
- quasi-static test

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References(15)

References

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