Unified Earthquake Response Analysis for Reinforced Concrete Structures

钢筋混凝土结构统一地震反应分析

基本信息

批准号：
01460173
负责人：
MACHIDA Atsuhiko
金额：
$ 4.22万
依托单位：
Saitama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

项目摘要

(1) A program for inelastic earthquake response analysis of reinforced concrete structures has been developed, in which the restoring forces of the members are determined based on stress-strain relationship of the materials. This program can be applied to rather simple structures such as single-column type piers. However, because of the long computation time needed, the program is not practical for complicated structures such as rigid-frame type structures.(2) A second program has been developed in which each member of a structure is divided into segments ; and within a segment, the same moment-curvature relationship is assumed. With this idealization, this program can be practically applied to complicated structures.(3) In the case of adopting Clough hysteresis model as the moment-curvature relationship in the second program using the proper load-carrying capacities and taking the segment lengths to be equal to the lengths of the plastic hinges, the results given by the second program … More agree well with experimental results of shaking-table tests and pseudodynamic tests in the range before the decrease of load-carrying capacities. Even after the load-carrying capacities have decreased, the response can still be determined accurately by the program as long as the curvature in the reduced load-carrying capacity is taken into account in the moment-curvature relationship.(4) When shear cracks occurs after flexural yielding, the procedure of lowering the load-carrying capacity in the moment-curvature relationship does not necessarily reflect the true nature of the phenomenon. Strictly speaking, the shear rigidity should also be decreased accordingly. This is an area of research that needs further investigation.(5) The elapsed time when the maximum acceleration occurs and also the number of times of acceleration with amplitude close to the maximum value have significant influence on the response of reinforced concrete structures. This should be taken into account in generating the synthetic earthquake for use in response analysis. Less

（1）已经开发了用于钢筋混凝土结构的非弹性地震反应分析的程序，其中根据材料的应力 - 应变关系确定成员的恢复力。该程序可以应用于相当简单的结构，例如单列型码头。但是，由于需要较长的计算时间，该程序对于诸如刚性类型结构之类的复杂结构都不是实用的。（2）已经开发了第二个程序，其中一个结构的每个成员都分为段；在一个段中，假定相同的力矩 - 曲面关系。有了这种构想，该程序实际上可以应用于复杂的结构。（3）在采用克拉夫滞后模型作为第二个程序中的矩缘关系的情况下，使用适当的负载能力和将部分长度的长度和等于第二个程序的长度等于第二个程序的长度，并具有更高的测试。负载能力。即使在载荷能力下降之后，只要在瞬间展发生的关系中考虑到降低的负载能力中的曲率，响应仍然可以准确地确定。（4）当弯曲屈服后发生剪切裂纹时，降低载荷能力的过程在降低量子载荷能力的过程中不一定会反映出真正的现象性质。严格来说，剪切刚度也应相应提高。这是一个需要进一步研究的研究领域。（5）最大加速发生的经过的时间以及接近最大值的放大器的加速度数量对钢筋混凝土结构的响应产生了重大影响。应考虑到为响应分析使用的合成地震。较少的