Affiliation:
1. School of Civil Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450015, China
2. Department of Civil Construction and Environmental Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA
3. Shaanxi Key Lab of Structure and Earthquake Resistance, School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Abstract
Composite structural insulated panels (CSIPs) are eco-friendly, high-performance materials, which not only good have mechanical properties, but also good waterproof, moisture-proof, fire-proof, and anti-corrosion characteristics, so they have been used to build envelope structures in recent years. However, how to improve stiffness of CSIPs remains unsolved. The poor stiffness is one of the biggest obstacles for the application of CSIPs in the load-bearing members of civil engineering. In this study, the layout of glass–polypropylene (PP) laminate layers is designed to enhance its stiffness, and this study applies CSIPs as load-bearing members of civil engineering for the first time. Thus, the bend model of CSIP thin-wall box-beams under uniform loading is built, based on Timochenko’s theory. The deflection curve equation is presented, considering shearing deformation. The expressions for the bending of normal strain flanges of the beam and the equation considering principal shearing strain at the beam’s web are obtained, respectively. Finally, mechanical properties of the thin-wall box-beam under uniformly distributed loads were performed by FE. FE results are entirely consistent with the theoretical results, thereby making the theoretical method applicable for the design of thin-wall box-beams, which are made of composite materials. Different from other beams, the shearing deformation is a critical factor that influences the deformation of thin-walled box-beams.
Funder
Science Foundation in the Henan province, China
NSFC
Key-Research-Projects of Higher Education Institutions of Henan Province, China
Key R&D Special Projects of Henan Province, China
Tackle-Key-Program of S&T Committee of Henan Province China
Subject
Building and Construction,Civil and Structural Engineering,Architecture
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