嵌入式基础叠合墙板平面外受弯性能试验研究与数值模拟分析  

EXPERIMENTAL AND NUMERICAL STUDY ON OUT-OF-PLANE BENDING BEHAVIOR OF A SUPERIMPOSED WALL WITH EMBEDDED FOUNDATION

作　　者：种迅[1] 黄俊旗[1] 蒋庆[1,2] 叶献国[1] 周博文[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]清华大学土木工程系土木工程安全与耐久教育部重点试验室,北京100084

出　　处：《工程力学》2015年第5期131-137,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50908071;51278519)

摘　　要：为改善叠合式地下室外墙板基础顶部的受力情况,提出了嵌入式基础。设计制作了两组共4个试件,并施加模拟侧向土压力的平面外荷载进行了静力加载试验。结果表明:墙板嵌入深度对受力性能有较大影响,嵌入深度较大的第1组试件基础基本保持完好,破坏模式为墙板底部在剪力和弯矩共同作用下发生斜拉破坏;对于嵌入深度较小的第2组试件,基础底座发生了严重破坏,破坏模式为跨中塑性铰达到转动极限;预制墙板和核心区现浇混凝土未发生明显滑移,能够有效地共同工作。在试验研究基础上,采用ANSYS软件对试件受力过程进行了数值模拟分析。分析与试验结果的对比表明:所建立的有限元分析模型可以较好地模拟试件的受力过程和破坏形态,可作为下一步研究的基础。A kind of embedded foundation was suggested for the superimposed basement exterior wall to improve its performance under out-of-plane bending moment. Four specimens, divided into two groups, were tested under static loads simulating the earth pressure. The test results indicated that embedded depth of the wall has obvious effects on the behavior of the specimens. For the first group of specimens, with comparatively large embedded depth, the foundations remained almost intact and the failure mode appeared to be diagonal tension failure under shear force and bending moment near the bottom of the walls. For the second group of specimens, with comparatively small embedded depth, the foundations were severely damaged and the failure mode occurred when the plastic hinges at the mid-span of the specimens reaching their ultimate rotation. The precast panels and the cast-in-place core concrete of the specimens could work together and no obvious slippage was observed. Based on the test, numerical investigation of the specimens was conducted using ANSYS. Comparison between the analyzing and test results showed that the finite element model was able to predict the mechanical behavior and damage pattern of the specimens well, and could be used in further study.

关 键 词：叠合式地下室外墙 嵌入式基础 平面外受弯性能 试验研究 数值模拟分析 

分 类 号：TU470[建筑科学—结构工程]