混合连续梁桥结合部连接栓钉受力分析

Analysis of Studs in Joint Section of Hybrid Continuous Beam Bridge

混合梁的使用大多是斜拉桥,而在连续梁桥上的应用还比很较少,为了探讨混合连续梁桥结合部的受力行为,采用通用有限元软件ANSYS,对其钢—混结合部的受力进行数值仿真分析.由于PBL板对混凝土的分割,影响结合段混凝土受力的整体性,因此本方案采用栓钉作为剪力连接件.分析表明,因混合连续梁桥结合部同时受到剪力、弯矩和较小的轴力作用,底板栓钉在远离承压板处受力较大,腹板栓钉在靠近顶板处受力较大,在设计中应予以考虑.

Almost all the use of hybrid bridge is cable - stayed bridge, and its use to continuous beam bridge is very few, to analysis the mechanical behavior of joint in hybrid continuous beam bridge, ANSYS, a general finite element package, was used to analyze the mechanical behavior of joint section with the method of numerical simulation. Be- cause the effect of integrity to concrete with the use of PBL, this analysis uses studs as shear connectors. The analy- sis shows that with the loads of bending moment, shear force and axial force, on bottom plate, stress of studs is bigger which are far away from bearing plate, and stress of studs is bigger when they close to top tray, and these thing should be considered in design.