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无格室-承压板钢-混凝土结合部构造的结构特性

, PP. 75-80

Keywords: 桥梁工程,结构特性,有限元方法,钢-混凝土结合部

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Abstract:

为了解无格室-承压板钢-混凝土结合部构造的结构特性,对该类型结合部构造的受力特点及各结构参数影响进行了较系统的研究。通过混合有限元方法建立了无格室-承压板结合部构造的局部计算模型,讨论了其受力特点,并选取混凝土梁预应力、抗剪连接件刚度、抗剪连接件数量、抗剪连接件间距及承压板厚度等5项参数,对该类型的构造进行了较为系统的参数分析。分析结果表明,承压板和钢梁顶底板上的抗剪连接件是该类型结合部荷载传递的主要部件,承压板以承受板厚方向的剪切为主,混凝土梁承担了大部分的结构荷载;在所取的参数范围内,承压板厚度20~70mm的影响很小;混凝土预应力、抗剪连接件刚度和数量对该类型的结合部构造的受力性能影响很大,是设计过程中需重点考虑的问题。

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