24СʱÈÈÃŰæ¿éÅÅÐаñ    

²é¿´: 2038  |  »Ø¸´: 12
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

small·Ç·É

Í­³æ (³õÈëÎÄ̳)

[ÇóÖú] Çó´óÉñ°ïÎÒ·­ÒëÒ»ÏÂÕâ¶Î»°°¡ ¡¢Ð¡µÜ¸Ð¼¤²»¾¡£¡£¡£¡¼±ÓÃ

Lenticular-shaped iron truss bridges, built exclusively by the Berlin Bridge Company of East Berlin, Conn., dominated the New England and adjacent area¡¯s modest span bridge market for over a decade at the end of the nineteenth century. This paper examines this phenomenon in the larger context of earlier European development of the lenticular form and, with the assistance of numerous patent drawings and photographs of American lenticular bridges that were either proposed or built prior to the 1883 formation of the Berlin Bridge Company.
»Ø¸´´ËÂ¥

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

²»Òªº¦Å¡¢ÓÀ²»ÑÔÆú¡£
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lsy1018

Í­³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
6Â¥: Originally posted by small·Ç·É at 2013-03-03 19:58:04
The bridge deck was supported at midspan and all panels had counters.ÔÙ°ï°ïæ¡¢·­ÒëÒ»ÏÂ...

ÄãÕâÒª·­ÒëµÄÊÇÂÛÎÄ»¹ÊÇ£¿
9Â¥2013-03-04 20:10:04
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 13 ¸ö»Ø´ð

weikaihere

ľ³æ (ÕýʽдÊÖ)

ÎÒ¸ÒÈ·¶¨£¬Õâ²»ÊÇÓ¢Óï¹ú¼ÒµÄÈËдµÄ
2Â¥2013-03-02 00:19:34
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lsy1018

Í­³æ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
small·Ç·É: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú 2013-03-03 16:29:48
ÕâÖÖλÓÚ¶«°ØÁÖ¿µÄùµÒ¸ñÖݵİØÁÖÇÅÁº¹«Ë¾¶ÀÁ¢½¨ÔìµÄÓ㸹ÐÎÌúèì¼ÜÇÅ£¬ÔÚ19ÊÀ¼ÍĩͳÖÎÁËÐÂÓ¢¸ñÀ¼µØÇøµÄÖеȿç¶ÈÇÅÁºÊг¡²»ÏÂÊ®Äê¡£ÔÚ°ØÁÖÇÅÁº¹«Ë¾1883Äê³ÉÁ¢³öÏÖ֮ǰµÄ´óÁ¿ÓйØÃÀ¹úÓ㸹ÐÎרÀû¡¢Í¼Ö½ºÍÕÕÆ¬µÄ°ïÖúÏ£¬±¾ÎÄ»ùÓÚÅ·ÖÞÔçÆÚÓ㸹ÐÎÇŵķ¢Õ¹µÄ±³¾°£¬¶ÔǰÊöÏÖÏó½øÐÐÁË̽ÌÖ¡£

Çë¶àÖ¸½Ì£¡
3Â¥2013-03-03 00:23:41
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

mygt_hit

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
ÓÉλÓÚ¶«°ØÁÖ¿µÄùµÒ¸ñÖݵİØÁÖÇÅÁº¹«Ë¾¶À¼Ò½¨ÉèµÄÓ㸹ʽÌúèì¼ÜÇÅ£¬ÔÚ19ÊÀ¼ÍÄ©µÄÊ®¶àÄêÖÐÖ÷Ô×ÁËÐÂÓ¢¸ñÀ¼¼°ÁÙ½üµØÇøµÄÖеȿç¶ÈÇÅÁºÊг¡¡£±¾ÎÄÔÚÓ㸹ʽÇÅÁºÔÚÔçÆÚÅ·Ö޵ķ¢Õ¹µÄ¿ò¼ÜÄÚ£¬½èÖúÓÚÔÚ1883Äê°ØÁÖÇÅÁº¹«Ë¾³ÉÁ¢Ö®Ç°ÓÉÎÒÃÇÌá³ö»òÕß½¨ÉèµÄÃÀ¹úÓ㸹ʽÇÅÁºµÄ´óÁ¿×¨Àûͼ¼þºÍÕÕÆ¬£¬¿¼²ìÁËÕâÖÖÏÖÏó¡£

²Î¿¼ÁË3Â¥µÄ²¿·Ö³É¹û£¬±íʾ¸Ðл¡£
ÖªÆäÈ»£¬ÖªÆäËùÒÔÈ»¡£
4Â¥2013-03-03 09:17:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O.5.4,¿ÆÄ¿È«,¿É+¼± +3 7K1CJE38xLG4 2026-08-25 5/250 2026-08-26 07:17 by cNXvBfCpiZOM
[¿¼²©] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O.5.4,¿ÆÄ¿È«,¿É+¼± +3 Qj98d49dHFb9 2026-08-25 5/250 2026-08-26 04:57 by cNXvBfCpiZOM
[»ù½ðÉêÇë] ½ñÌìÎñί»á¿ªÍêÁË£¬Ã÷Ìì³ö½á¹ûÂð +18 angus9576 2026-08-25 22/1100 2026-08-26 00:41 by merchancy
[»ù½ðÉêÇë] ÔÚ¼á±ù»¹¸Ç×ű±º£µÄʱºò£¬ÎÒ¿´µ½ÁËÅ­·ÅµÄ÷»¨¡£ (½ð±Ò+10) +6 ziyangfang 2026-08-25 9/450 2026-08-25 20:26 by huagongfeihu
[»ù½ðÉêÇë] Ã÷ÌìÓ¦¸Ã¿É²éÁË£¡£¿ +6 chengyan1220 2026-08-23 6/300 2026-08-25 19:45 by zfd97
[»ù½ðÉêÇë] ·Å°ñǰµÄ²»µ­¶¨ 20+4 snowwithsea 2026-08-19 19/950 2026-08-25 17:57 by chick875
[»ù½ðÉêÇë] ½ñÈÕ²»·Å°ñ£¿Íø´«¹ú×ÔȻԤ¼Æ 8 Ô 27 Èտɲé½á¹û +17 ҽѧÀÏÄк¢ 2026-08-20 22/1100 2026-08-25 15:36 by ҽѧÀÏÄк¢
[»ù½ðÉêÇë] Èç¹û´Ë¿ÌÄãÕýÔÚΪ¹ú»ù¸Ðµ½½¹ÂÇ£¬²»·ÁÀ´ÌýÌýÕâÊס¶»ù½ðÖ®Íâ¡· +8 scalable 2026-08-24 8/400 2026-08-25 12:52 by jnhyjjm
[»ù½ðÉêÇë] ûÓÐÈκÎÏûÏ¢-ÊDz»ÊǾÍÁ¹ÁË +9 ͼÀ²Í¼À² 2026-08-24 10/500 2026-08-25 11:59 by ÄϺ£Ð¡¸ç
[½Ìʦ֮¼Ò] µ¼Ê¦Í²ۣºÎÒÔõô̯ÉÏÁËÕâô¸ö¼«Æ·Ñо¿Éú£¡ +3 ËÕ¶«ÆÂ¶þÊÀ 2026-08-23 3/150 2026-08-25 10:35 by shisan1313
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +5 process2012 2026-08-23 7/350 2026-08-25 09:42 by huixian257
[»ù½ðÉêÇë] ½ñÌì»ù½ð»á³ö½á¹ûÂð£¿20260819 +17 kkkl_v 2026-08-19 18/900 2026-08-25 09:41 by windflowerwy
[»ù½ðÉêÇë] ÎÒÃæÉÏÍêµ°ÁË +13 ÇÒÌý»¢Ð¥ 2026-08-20 14/700 2026-08-25 09:10 by mrkang
[»ù½ðÉêÇë] Ö»ÓÐÿÄêÕâÖÖʱºòÀ´¹ä¹äСľ³æ +25 yaoyewhu2008 2026-08-20 27/1350 2026-08-25 08:01 by Equinoxhua
[»ù½ðÉêÇë] ÄÜ·ñÍ˳ö²ÎÓëµÄÃæÉÏÏîÄ¿½â³ýÏÞÏî +21 koalala 2026-08-24 24/1200 2026-08-24 19:25 by ¼ÒÓëÔ¶·½
[»ù½ðÉêÇë] ÈÃÎÒÖÐÒ»¸öÃæÉϰɣ¡ +13 ´óƼ1987 2026-08-20 16/800 2026-08-24 10:23 by ̫ɵÁË
[»ù½ðÉêÇë] ¿ÆÑй¶ùÌ«ÄÑÁË +18 ÎÒ4´ó°×²Ë 2026-08-20 19/950 2026-08-24 09:47 by ¿­¶÷¹ãÊ¢´ß»¯·ÖÎ
[»ù½ðÉêÇë] ½ñÌì·Å°ñÂ𣿠+15 ²¼²¼ºÍÒ»¶þ 2026-08-19 16/800 2026-08-23 09:55 by ÕÅ´ºÉú
[»ù½ðÉêÇë] ¿´À´½ñÌì²»»á·Å°ñÁË£¿ +8 chengyan1220 2026-08-21 11/550 2026-08-21 17:52 by dcqxinyang
[»ù½ðÉêÇë] ½ñÌì·Å°ñûϷÁ衃 +9 yuleib84 2026-08-19 11/550 2026-08-21 10:06 by gltch
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û