双钢板-混凝土组合防护结构受力机理研究综述

Review on mechanisms of double skin composite protective structures

双钢板-混凝土组合结构不仅具有省模板、少支模等施工便捷性,而且具有抗渗性好、变形能力强、抗冲击与抗爆性能突出等良好的力学性能,在核设施、近海工程设施等防护抗灾结构中具有良好应用前景。除了抵御极端荷载外,防护结构在常规荷载下的良好受力性能对其维持正常使用功能、减少日常事故风险以及避免次生灾害至关重要。本文介绍了双钢板-混凝土组合防护结构的工程应用与研究现状,着重总结了各类新型双钢板-混凝土组合结构构件与连接的受力机理与性能,并以近年相关理论分析、试验与数值模拟等研究为例进行详细说明。内容主要涉及双钢板-混凝土组合防护结构中剪力连接件受剪与受拉性能、平面及曲面双钢板-混凝土组合梁斜截面抗剪与正截面抗弯性能、双钢板-混凝土组合墙(板)面外局部荷载作用下冲切性能与墙体受压性能、双钢板-混凝土组合壳面外冲切性能。

Double skin composite structures(DSCS),possessing extensive advantages of saving formworks,reducing on-site casting works,excellent penetration resistance and deformation capacity,and excellent structural performances under impact and blast loads,exhibit wide potential applications as protective structures in buildings,nuclear facilities,and offshore structures.Besides extreme loads,good mechanical performance of the protective structures under various conventional loads are important for maintaining the daily function,reducing the risk of normal accidents and avoiding secondary disasters.This paper introduces the research developments on double skin composite structures.It especially summarized the innovations and working mechanisms on double skin composite(DSC)structural members,and introduces the research achievements on theory,tests,and numerical simulations as well as case studies.The extensive review in this paper includes shear and tensile behavior of connections in DSCSs,flexural bending and diagonal shear behavior of flat and curved DSC beams,punching shear behavior of DSCS under out-of-plane punching shear and compressive behavior of DSC walls,and punching shear behavior of DSC shells.