(SGER) Load Distribution Factors for Developed Innovative CFRP Prestressed Concrete Box-Beam Bridge System

根据SGER奖提供支持，以开发公路桥梁交通荷载下加载和卸载碳纤维增强聚合物（CFRP）预应力混凝土箱梁之间的荷载分配系数（LDF）。这一信息是迫切需要的第一个计划CFRP预应力混凝土桥梁将在这个国家，这是已经计划。为了开发这种类型的桥梁的LDF方程，将建立两个二分之一比例的纵向和横向CFRP预应力束的CFRP混凝土箱形梁桥模型，并进行充分的测试。.每个桥梁模型将在不同的无粘结横向力水平下进行后张。桥梁模型将承受使用荷载限值内的偏心和同心卡车荷载。所得的LDF对桥梁设计工程师合理确定预应力混凝土箱梁的尺寸具有重要意义。这项调查将导致有价值的技术信息，可以采用在未来的CFRP预应力混凝土桥梁在美国的设计和施工。研究团队开发的数据、设计方法和施工信息将提供设计指南，可在未来的ACI和AASHTO设计手册中实施。

Support is provided under an SGER award to develop the load distribution factors (LDF) between loaded and unloaded carbon fiber reinforced polymer (CFRP) prestressed concrete box beams under traffic loads for highway bridges. This information is urgently needed for the first planned CFRP prestressed concrete bridge to be built in this country, which is already planned. In order to develop the LDF equations for this type of bridge two one-half scale CFRP concrete box beam bridge models with longitudinal and transverse CFRP prestressing strands will be built and fully instrumented. . Each bridge model will be post-tensioned at different unbonded transverse force levels. The bridge models will be subjected to eccentric and concentric truck loadings within the service load limit. The obtained LDF is of significant importance to bridge design engineers to properly size the prestressed concrete box beams. This investigation will result in valuable technical information that can be adopted in the design and construction of future CFRP prestressed concrete bridges in the USA. The data, design approach and construction information developed by the research team will offer design guidelines that can be implemented in future ACI and AASHTO design manuals.