Abstract
Research on multi-hazard prevention and mitigation in building structures is the most recent developing trend in civil engineering. In this study, an analytical model is proposed to calculate the structural resistance of a type of multi-hazard resilient prefabricated concrete (MHRPC) frame under earthquake and column removal scenarios. The MHRPC frame is assembled using prefabricated RC beams and columns, unbonded post-tensioning (PT) tendons, energy-dissipating steel angles, and large rotational shear plates. According to the experimental results, the MHRPC frame exhibits the features of low damage and self-centering under seismic loading. Meanwhile, when subjected to column removal scenarios, the MHRPC frame is proven to demonstrate a high progressive collapse resistance. In order to calculate the seismic and progressive collapse resistance of the MHRPC frame, analytical models for the critical components in the MHRPC frame (PT tendons and steel angles) are compared and selected based on the experimental results and numerical simulations. Furthermore, calculation methods for the seismic and progressive collapse resistance of the MHRPC frame specimens are proposed. The calculation results are validated using the experimental results. This study could provide a reference for the design of MHRPC frame structures, considering both earthquake and progressive collapse.
Highlights
Over the past several years, increased attention has been paid to multi-hazard mitigation and prevention of building structures in the engineering community. Li et al (2011) reviewed the state-of-art research on the multi-hazard from the perspective of (1) damages and loses, (2) assessment of effects, and (3) design and mitigation strategies
The results indicate that, compared to the conventional RC frame, the multi-hazard resilient prefabricated concrete (MHRPC) frame specimen exhibits substantially smaller residual deformations and less component damage following the seismic cyclic test
The results indicate that the calculated cyclic response of the MHRPC joint specimen, including the tendon force-rotation relationship, fits strongly with the test results
Summary
Over the past several years, increased attention has been paid to multi-hazard mitigation and prevention of building structures in the engineering community. Li et al (2011) reviewed the state-of-art research on the multi-hazard from the perspective of (1) damages and loses, (2) assessment of effects, and (3) design and mitigation strategies. In order to improve the seismic and progressive collapse resistance of newly-designed RC frame structures simultaneously, a novel multi-hazard resilient prefabricated concrete (MHRPC) frame, incorporating a series of highperformance components, namely post-tensioning (PT) tendons, energy-dissipating steel angles, and shear plates, is proposed, as illustrated in Figures 1A,B (Lin et al, in press).
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