复合材料有许多优点，如比强度、比刚度大，重度小且耐腐蚀等，最近几年来在桥梁工程中已有一定的应用［１］。夹层梁由上、下面板和中间的夹层组成，面板主要承受结构的弯矩，中间的夹层主要承受剪力。夹层梁结构较之一般的梁结构有自重小、承载力大的优点，广泛应用于飞... Composite materials have many advantages, such as specific strength, specific stiffness, low severity and corrosion resistance, etc., which have been used in bridge engineering in recent years [1]. The sandwich beam is composed of upper and lower panels and a middle sandwich. The panel is mainly subjected to the bending moment of the structure, and the middle sandwich is mainly subjected to the shear force. The sandwich beam structure has the advantages of small self-heavy weight and large bearing capacity compared with the general beam structure, and is widely applied to fly...