空腹拱 meaning in English

caisson soffit
open spandrel arch
spandrel arch

Taking out a piece of frame in vierendeel latticed shell , analyzing the sameness and difference between vierendeel arc and full - web arc in mechanics characteristic
取出一榀空腹拱为研究对象，分析了它与实腹拱在受力特点和性能的异同。
The results indicate that the vierendeel arc is similar to full - web arc in macro while they are different in local . by comparing the mechanics characteristic between orthogonal vierendeel dome and vierendeel arc , the results reveal that vierendeel dome has the advantages of vierendeel arc and shell structures
通过对正交空腹网壳整体结构的受力特点与单榀空腹拱的比较，表明正交空腹网壳具有空腹拱的优点，又发挥了壳体结构以受薄膜力为主的特点。