Estimation of Lateral Resistance of Anchor-Bolt Joints for High Resistant Timber Residential Constructions

高强度木结构住宅建筑锚栓接头横向阻力的估算

基本信息

批准号：
15380115
负责人：
HIRAI Takuro
金额：
$ 6.59万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15380115/
关键词：
Multiple anchor-bolt joints Lead-hole clearance Length diameter ratio Effective lateral resistance Initial stiffness Energy absorption canacity Monte Carlo simulation Stepwise linear analysis 弾性床上の梁理論破壊面圧変位耐力壁線一面せん断試験

项目摘要

Lateral resistance of single-anchor-bolt joints with 12 mm or 16 mm bolts was examined experimentally for ordinary specifications of Japanese post and beam constructions. Anchor-bolt joints loaded perpendicular to the grain had much lower maximum resistance, much smaller maximum slips and much smaller energy capacities. Maximum lateral resistance and maximum slips of the anchor-bolt joints with 16 mm bolts varied in wide range. Safety factor calculated from the fifth percentile lower limit maximum resistance and the short term allowable resistance was larger for the joints with 12 mm bolts than for the joints with 16 mm bolts.Monte Carlo simulations were conducted using the test results to estimate the effective lateral resistance of multiple anchor-bolt joints with lead-hole clearances. Anchor-bolt joints loaded perpendicular to lateral forces were not recommended to be counted as supplementary resisting elements because the supplementary shares of them were far less than those expected from the allowable lateral resistance of them. Multiple anchor-bolt joints with small length/diameter ratios had comparatively lower effective resistance ratios than multiple anchor-bolt joints with large length/diameter ratios. The effective resistance of multiple anchor-bolt joints was affected not only by lead-hole clearance or number of bolts but also variance of load-slip characteristics of single anchor-bolt joints.Monte Carlo simulations were also conducted using load-slip curves of single anchor-bolt joints given by the stepwise linear analyzes to estimate the effect of sill thickness on the load-slip characteristics of single anchor-bolt joints. The simulated results showed that lead-hole clearance affected more clearly as length/diameter ratios of single anchor-bolt joints decrease.

针对日本柱梁结构的普通规格，对采用 12 毫米或 16 毫米螺栓的单锚栓接头的侧向阻力进行了实验检验。垂直于纹理加载的锚固螺栓接头具有低得多的最大阻力、更小的最大滑移和更小的能量容量。 16mm螺栓锚栓接头的最大侧向阻力和最大滑移量变化范围较大。根据第五百分位下限最大阻力计算得出的安全系数，12 mm 螺栓节点的短期允许阻力大于 16 mm 螺栓节点。利用试验结果进行蒙特卡罗模拟，估算有效侧向阻力具有导孔间隙的多个锚栓接头。垂直于侧向力加载的锚栓接头不建议计为补充抗力元件，因为其补充份额远小于其许用侧向阻力的预期值。具有小长径比的多个锚栓接头比具有大长径比的多个锚栓接头具有较低的有效阻力比。多锚栓接头的有效阻力不仅受到导孔间隙或螺栓数量的影响，而且还受到单锚栓接头荷载滑移特性变化的影响。还利用单锚栓接头荷载滑移曲线进行了蒙特卡罗模拟。通过逐步线性分析给出锚栓接头，以估计窗台厚度对单个锚栓接头荷载滑移特性的影响。模拟结果表明，随着单个锚栓接头长径比的减小，导孔间隙的影响更加明显。