摘要
考虑剪跨比、截面高宽比两个因素,设计14个侧压竹材集成材简支梁试件,对其力学性能进行试验研究,采用非接触式激光位移传感器和Vic-3D测试系统进行位移测量。结果表明:侧压竹材集成材梁经历弹性阶段、弹塑性阶段后,突然发生脆性断裂破坏;侧压竹材集成材简支梁试件的抗压弹性模量与抗拉弹性模量相等;试件截面平均应变符合平截面假定;试件中竹材的抗压强度没有得到充分发挥;随着剪跨比的增大,试件的承载力下降较快,而梁截面宽度对承载力的影响较小。
Considering different shear span ratios and height to width ratios,14 side pressure laminated bamboo beam specimens have been designed and tested to study the mechanical performance. Two kinds of advanced displacement measuring instruments were used in the experiments. The test results indicate brittle failure happened suddenly for the side pressure laminated bamboo beam after the elastic stage and elasto-plastic stage during the loading process. The elastic modulus for compression and tension of the laminated bamboo were the same,and the average strain of the cross-section conformed to the plane section assumption. The compressive strength of the bamboo wasn't made full use. With the increase of shear span ratio,the ultimate shear strength of the specimens decrease quickly,and the influence of the width on the ultimate load is small.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2015年第3期121-126,共6页
Journal of Building Structures
基金
江苏省自然科学基金项目(BK20130978)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
侧压竹材集成材简支梁
静力试验
挠度
剪跨比
峰值应力
side pressure laminated bamboo beam
static test
deflection
shear span ratio
peak stress
