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Study on Load-Carrying Capacity and Dynamic Effect of RC Beam and Slab under Variable Load

变荷载作用下RC梁、板的承载能力及动力效应研究

基本信息

批准号：
13650533
负责人：
KIDA Tetsukazu
金额：
$ 1.98万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650533/
关键词：
New one-plane shear test Property of shear RC beam RC slab Variable load Coefficient of dynamic effect Failure mechanism Punching shear load-carrying capacity 静荷重実験走行荷重実験走行振動荷重実験せん断強度押し抜きせん断力学耐力実験衝撃係数衝撃係数実せん断応力度走行荷重

项目摘要

In this study, a running vibration load test unit capable of applying the fluctuating loads supposed large vehicles was used to conduct (1)static load tests (2)running load tests (3)constant running load tests and (4)running vibration load tests on reinforced concrete beam and slab test specimens, in order to determine the load-carrying capacity, failure mechanism and effect of vibrations in each test. The results provided new knowledge for use in improving the methods used to design reinforced concrete members.(1) Study of shear strength concrete materialsWith regard to shear strength, conventional (1)one-plane shear test and (2)Mode II type one-plane shear test were conducted. From the relationship between compressive strength and Mode II single shear strength, shear strength characteristic value for ordinary to high strength ranges was formulated.(2)Study of load-carrying capacity of reinforced concrete beams and slabsA single-reinforcement oblong section reinforced concrete slab an … More d a multiple-reinforcement oblong section reinforced concrete slab were used to perform (1)static load tests (2)running load tests (3)constant running load tests and (4)running vibration load tests to verify the effect of running loads on the static flexural load-carrying capacity of reinforced concrete beams. A study was also conducted to determine the conformity of static flexural load-carrying capacity with ultimate flexural load-carrying capacity in limit state design methods, and the handling of member correction factors with respect to running loads was also evaluated. In addition, studies were also conducted for the punching shear load-carrying capacity and failure mechanism of reinforced concrete slabs, and the effect of the dynamic characteristics of concrete members on punching shear load-carrying capacity was evaluated from tests, in order to evaluate the conformity of test load-carrying capacity with theoretical load-carrying capacity and the punching shear load-carrying capacity of reinforced concrete slabs subjected to running loads.(3)Study of dynamical influence of load fluctuations on reinforced concrete beams and slabsIndoor tests were conducted to determine the dynamical influence of load fluctuations on the reinforced concrete slabs of steel highway bridges. Reinforced concrete beams and slabs were used as test specimens for these tests. The test impact coefficient was derived from the dynamic amplification factor resulting from flexure when running vibration load was applied, and the dynamical influence coefficient was evaluated. An equation utilizing this dynamical influence coefficient for use in calculating the design bending moment for the reinforced concrete slabs in highway bridges was also proposed. Less

本研究利用能够施加大型车辆波动荷载的行驶振动荷载试验装置，对钢筋混凝土梁板试件进行(1)静载试验(2)行驶荷载试验(3)恒定行驶荷载试验和(4)行驶振动荷载试验，以确定各试验的承载能力、破坏机理和振动影响。研究结果为改进钢筋混凝土构件的设计方法提供了新的认识。(1)抗剪强度混凝土材料的研究在抗剪强度方面，进行了常规的(1)单面剪切试验和(2)II型单面剪切试验。从抗压强度与II型单剪强度之间的关系出发，建立了普通到高强范围内的抗剪强度特征值。(2)钢筋混凝土梁和板的承载能力研究钢筋混凝土单筋长方形截面板和…为了验证运行荷载对钢筋混凝土梁静弯承载能力的影响，采用多根钢筋混凝土长方形截面板进行了(1)静载试验(2)运行荷载试验(3)恒定运行荷载试验和(4)运行振动荷载试验。此外，还对极限状态设计方法中静力抗弯承载力与极限抗弯承载力的一致性进行了研究，并对构件相对于运行荷载修正系数的处理进行了评估。此外，还对钢筋混凝土板的冲剪承载能力和破坏机理进行了研究，并通过试验评价了混凝土构件的动力特性对冲剪承载能力的影响，以评价试验承载能力与理论承载能力和运行荷载作用下钢筋混凝土板的冲剪承载能力的一致性。(3)荷载波动对钢筋混凝土梁和板的动力影响研究通过室内试验，确定荷载波动对钢桥钢筋混凝土板的动力影响。试验采用钢筋混凝土梁和板作为试验试件。在运行振动载荷作用下，由挠曲产生的动力放大系数推导出试验冲击系数，并对动力影响系数进行了估算。提出了利用动力影响系数计算公路桥梁钢筋混凝土板设计弯矩的公式。较少