《Earthquake Engineering & Engineering Vibration》刊登“包括基础面与层缝面的混凝土重力坝的增量动态分析”

作者：Alembagheri Mohammad，Ghaemian Mohsen

刊物：《地震工程与工程振动》，2013年3月，第12卷第1期，119-134页

关键词：混凝土重力坝，损伤指标，增量动态分析，接缝，性能特征，抗震分析，结构承载能力

摘要：计算机处理程序的发展使利用耗时分析法在短时间内可以进行高精度分析，例如增量动态分析（IDA）。在IDA研究中，先在一结构上施加一系列地震荷载，并先后增加强度等级使得结构从弹性状态进入塑性状态，直至破坏。通过这样的方法可以确定结构的极限状态和结构承载力。目前，在进行混凝土重力坝的IDA研究时，应该考虑混凝土的非线性行为、坝体内和坝基界面的滑动面。研究了摩擦角和层缝面的斜率对响应参数的影响，确定了大坝不同的极限状态。观察到了通过引入层缝面可以避免大坝结构的拉伸损伤。在强震中层缝面的滑移与基地接缝摩擦角以及大坝上部纽带倾斜层缝面沿着上游滑动基本是无关的。

Incremental dynamic analysis of concrete gravity dams including base and lift joints

Authors: Alembagheri Mohammad，Ghaemian Mohsen

Journal: Earthquake Engineering & Engineering Vibration. Mar2013, Vol. 12 Issue 1, p119-134. 16p.

Key word: concrete gravity dams，damage index，incremental dynamic analysis，joints，performance characteristics，seismic analysis，structural capacity

Abstract: The growth in computer processing power has made it possible to use time-consuming analysis methods such as incremental dynamic analysis (IDA) with higher accuracy in less time. In an IDA study, a series of earthquake records are applied to a structure at successively increasing intensity levels, which causes the structure to shift from the elastic state into the inelastic state and finally into collapse. In this way, the limit-states and capacity of a structure can be determined. In the present research, the IDA of a concrete gravity dam considering a nonlinear concrete behavior, and sliding planes within the dam body and at the dam-foundation interface, is performed. The influence of the friction angle and lift joint slope on the response parameters are investigated and the various limit-states of the dam are recognized. It is observed that by introducing a lift joint, the tensile damage can be avoided for the dam structure. The lift joint sliding is essentially independent of the base joint friction angle and the upper ligament over the inclined lift joint slides into the upstream direction in strong earthquakes.

原文链接：https://vpn2.nlc.gov.cn/prx/000/http/web.ebscohost.com/ehost/detail?vid=6&sid=06a1f387-ba17-4034-9b33-79ed8b1229ae%40sessionmgr4&hid=19&bdata=Jmxhbmc9emgtY24mc2l0ZT1laG9zdC1saXZl#db=a9h&AN=85986020