作为轻钢结构,集装箱房的水平抗侧能力是其抗震抗风设计的重要力学性能指标,而目前却缺乏可靠的理论计算式用以分析.为对实际工程设计提供参考,且为完善波纹蒙皮结构的理论体系,本文对集装箱房水平抗侧刚度的计算式进行推导.区别于传统利用螺栓连接的蒙皮结构,集装箱房的侧壁波纹板与其钢框架之间是焊接连接的,在剪切作用下的平面内相互作用力分布以及变形组成有很大变化,求解关键在于分析波纹膜板在焊接边界条件下的蒙皮效应.基于能量理论,结合ABAQUS有限元模拟方法,分析了集装箱房在顶部水平均布荷载作用下的理想抗侧刚度以及顶角件处水平集中荷载作用下的局部效应,分别得到相应的抗侧刚度计算公式,并利用已有试验数据对理论进行验证.结果表明:集中荷载作用下,加载端局部变形远大于整体侧移,且局部效应的有效作用范围同上侧梁线刚度、集装箱规格有关.实际工程中,通过增加上侧梁有效截面面积或上下层之间的连接件数量,可有效减小局部变形,提升整体抗侧能力.%As a light steel structure, the horizontal lateral resistance is an important parameter for the aseismic design of container house, while there is no reliable theoretical calculation formula.To provide reference for design and improve the theoretical system of corrugated skin structure, this paper deduced the calculation formula of lateral stiffness of container house.Different from the traditional skin structure using bolt connections, the side wall plate and steel frame of container house are connected by welding, the shear stress distribution and deformation composition in plane vary greatly, and the key point of solution is to analyze the diaphragm effect of corrugated plate under the welding boundary condition.Based on the energy theory and ABAQUS finite element simulation, the ideal lateral stiffness under uniformly horizontal distributed load and the local deformation under concentrated load at the top corner fitting were analyzed respectively.Then the calculation formula of lateral stiffness was derived, and it was verified by the experimental data.The results show that: under the concentrated load, the local deformation is much larger than the overall lateral displacement and the local effect ranges with the beam stiffness and the specifications of the container.In practical engineering, it is effective to increase the beam's effective sectional area or the amounts of connecting components for reducing the local deformation and improving the whole lateral stiffness.
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